A PHASE 3 RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED, PARALLEL GROUP, MULTI-CENTER STUDY TO EVALUATE THE EFFICACY AND SAFETY OF PF-04965842 MONOTHERAPY IN SUBJECTS AGED 12 YEARS AND OLDER, WITH MODERATE TO SEVERE ATOPIC DERMATITIS
Phase: PHASE3
Conditions: Dermatitis, Atopic
Sponsor: Pfizer

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A PHASE 3 RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED, 
PARALLEL GROUP, MULTI-CENTER STUDY TO EVALUATE THE EFFICACY 
AND SAFETY OF PF-04965842 MONOTHERAPYIN SUBJECTS AGED 12 YEARS 
AND OLDER, WITH MODERATE TO SEVERE ATOPIC DERMATITIS
Investigational Product Number:
PF-04965842
Investigational Product Name:
Not applicable (N/A)
United States (US) Investigational New 
Drug (IND) Number:
European Clinical Trials Database 
(EudraCT) Number:
2018-001136-21
Protocol Number:
B7451013
Phase:
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Document History
Document
Version Date
Summary of Changes and Rationale
Amendment 3
06 December 2018
For Japan and Republic of Korea only:
Similar to China, other countries in Asia,
such as Japan and Republic of Korea, have 
a high prevalence of hepatitis B surface 
antigen (HBsAg) negative, hepatitis B core 
antibody (HBcAb) positive, and hepatitis B 
surface antibody (HBsAb) positive 
serology. Therefore, Republic of Korea 
will adopt the same changes and Japan will 
adopt similar changes as those proposed 
for China in Amendment 2 to monitor the 
risk of hepatitis B reactivation.  The 
following sections of the protocol are 
affected: Schedule of Activities, 
Sections 4.2, 6.1, 6.2.7, 7.6.2, 7.6.2.1 and 
Appendix 1.
For Japan only: 
Based on local request, HBsAg, HBcAb 
and HBsAb testing will be performed 
concurrently at Screening for all subjects 
rather than performing HBsAb as a reflex 
test only.  
Based on local practices for tuberculosis 
testing in Japan, if QuantiFERON- TB 
Gold In-Tube (QTF-G) testing is not 
possible, the T-SPOT.TB test performed 
at a local laboratory is acceptable as the 
screening TB test. The following sections 
of the protocol are affected: Schedule of 
Activities, Sections 4.2, 6.1, 7.3.4 and 
7.6.2.
Amendment 2
12 September 2018
The following changes were requested by 
an Ethics Committee in China. These 
changes are in effect for China only.
Subjects who are HBsAg negative, HBcAb 
positive, and HBsAb positive at Screening

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will have reflex testing for HBV DNA. 
Subjects who have HBV DNA above the 
lower limit of quantification (LLQ) will be 
excluded. Subjects who are HBV DNA 
negative or below LLQ may be 
randomized but will have repeat HBV 
DNA testing at Week 12 (or early 
termination).
The following sections of the protocol are 
affected:

Schedule of Activities;

Section 4.2. Exclusion Criteria;

Section 6.1. Visit 1, Screening;

Section 6.2.7. Visit 8, Day 85/Week 12 
(±3 days) or Early Termination Visit;

Table of Laboratory Tests in 
Section 7.6.2. Laboratory Testing;

Section 7.6.2.1. Hepatitis Testing.
The protocol changes specified in Protocol 
Administrative Change Letter #1 (09 May 
2018) have been incorporated in Section 
4.1 Inclusion Criteria 3, 3rd bullet, and 
Section 7.8.1 Pruritus Numerical Rating 
Scale (NRS).
The protocol changes specified in Protocol 
Administrative Change Letter #2 (23 Jul 
2018) have been incorporated in 
Appendix 3. Prohibited Concomitant 
Medications.

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Amendment 1
13 July 2018
Added European Clinical Trials Database 
(EudraCT) Number on the cover page.
The following changes were requested 
from the Voluntary Harmonisation 
Procedure (VHP) for participating member 
states only (Czech Republic, Germany, 
Hungary, Latvia, Poland, United 
Kingdom):
1. In Section 1.2.4, additional text was 
added to present the model-estimated 
proportion of subjects achieving 
EASI-75 response in Phase 2B study 
B7451006. 
2. In Section 4.2, exclusion criterion 19, 
the absolute lymphocyte count 
thresholds have been updated to 
age-specific ranges.
The list of abbreviations has been updated 
to include VHP.
Final Protocol
27 February 2018
Not applicable (N/A)
This amendment incorporates all revisions to date, including amendments made at the 
request of country health authorities and institutional review boards (IRBs)/ethics 
committees (ECs).

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TABLE OF CONTENTS
LIST OF TABLES...................................................................................................................10
LIST OF FIGURES.................................................................................................................10
APPENDICES.........................................................................................................................10
PROTOCOL SUMMARY.......................................................................................................12
SCHEDULE OF ACTIVITIES................................................................................................18
1. INTRODUCTION...............................................................................................................24
1.1. Mechanism of Action/Indication.............................................................................24
1.2. Background and Rationale......................................................................................25
1.2.1. Drug Development and Rationale..............................................................25
1.2.2. Atopic Dermatitis........................................................................................25
1.2.3. Non-Clinical and Phase 1 Data...................................................................27
1.2.4. Phase 2b in AD (B7451006).......................................................................27
1.3. Summary of PF-04965842 Clinical Pharmacokinetics...........................................28
1.3.1. Population Pharmacokinetics......................................................................29
1.4. Summary of Benefits and Risks..............................................................................29
1.5. Dose Selection Rationale........................................................................................30
2. STUDY OBJECTIVES AND ENDPOINTS.......................................................................31
3. STUDY DESIGN.................................................................................................................33
4. SUBJECT ELIGIBILITY CRITERIA.................................................................................35
4.1. Inclusion Criteria.....................................................................................................35
4.2. Exclusion Criteria....................................................................................................37
4.3. Randomization Criteria...........................................................................................42
4.4. Lifestyle Requirements...........................................................................................42
4.4.1. Contraception..............................................................................................43
4.4.2. Vaccine and Exposure to Infections Guidelines.........................................45
4.4.2.1. Subject Specific Recommendations..........................................45
4.4.2.2. Guidance Regarding Household Contact Vaccine-Related 
Exposure............................................................................................45
4.4.3. Surgery........................................................................................................45
4.5. Sponsor’s Qualified Medical Personnel..................................................................46
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5. STUDY TREATMENTS.....................................................................................................46
5.1. Allocation to Treatment..........................................................................................46
5.2. Breaking the Blind..................................................................................................47
5.3. Subject Compliance.................................................................................................47
5.4. Investigational Product Supplies.............................................................................48
5.4.1. Dosage Form(s) and Packaging..................................................................48
5.4.2. Preparation and Dispensing........................................................................48
5.5. Administration.........................................................................................................48
5.6. Investigational Product Storage..............................................................................49
5.7. Investigational Product Accountability...................................................................50
5.7.1. Destruction of Investigational Product Supplies........................................50
5.8. Concomitant Treatment(s).......................................................................................50
5.8.1. Permitted Concomitant Medications..........................................................51
5.8.2. Prohibited Medications and Treatments.....................................................52
6. STUDY PROCEDURES.....................................................................................................52
6.1. Visit 1, Screening....................................................................................................53
6.2. Treatment Period.....................................................................................................56
6.2.1. Visit 2, Day 1/Week 0 (Baseline)...............................................................56
6.2.2. Visit 3, Day 8/Week 1 (1 day)..................................................................57
6.2.3. Visit 4, Day 15/Week 2 (1 day)................................................................57
6.2.4. Visit 5, Day 29/Week 4 (2 day)................................................................58
6.2.5. Visit 6, Day 43/Week 6 (3 day)................................................................59
6.2.6. Visit 7, Day 57/Week 8 (3 day)................................................................60
6.2.7. Visit 8, Day 85/Week 12 (3 days) or Early Termination Visit.................61
6.3. Follow-up Visits......................................................................................................62
6.3.1. Visit 9, Day 120/Week 16 (3 day)............................................................62
6.4. Subject Withdrawal.................................................................................................63
7. ASSESSMENTS..................................................................................................................65
7.1. Pregnancy Testing...................................................................................................65
7.3. Safety Assessments.................................................................................................67
7.3.1. Vitals Signs.................................................................................................67
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7.3.2. Medical History, Physical Examination, Height, and Weight....................68
7.3.3. Chest X-Ray................................................................................................69
7.3.4. Tuberculosis Testing...................................................................................69
7.3.5. Electrocardiogram.......................................................................................70
7.3.6. Special Safety Assessment.........................................................................70
7.4. Skin Type Assessment............................................................................................70
7.5. Assessment of Suicidal Ideation and Behavior.......................................................71
7.5.1. Columbia Suicide Severity Rating Scale (C-SSRS)...................................71
7.5.2. Suicidal Behaviors Questionnaire-Revised (SBQ-R).................................71
7.5.3. Patient Health Questionnaire –8 items (PHQ-8).......................................71
7.6. Clinical Laboratory Tests........................................................................................71
7.6.1. Blood Volume.............................................................................................71
7.6.2. Laboratory Tests.........................................................................................71
7.6.2.1. Hepatitis Testing.......................................................................73
7.6.2.2. Varicella Zoster Virus (VZV) IgG Antibody (Ab) Testing......74
7.6.2.3. Baseline Viral Screen................................................................74
7.7. Efficacy Assessments..............................................................................................74
7.7.1. Rater Qualifications....................................................................................74
7.7.2. Investigator’s Global Assessment (IGA)....................................................74
7.7.3. Eczema Area and Severity Index (EASI)...................................................75
7.7.3.1. Body Surface Area –Efficacy (BSA Efficacy).........................78
7.7.4. Scoring Atopic Dermatitis (SCORAD)......................................................78
7.7.5. Photography of Representative AD Lesions...............................................79
7.8.2. Night Time Itch Scale.................................................................................80
 
 
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7.9. Pharmacokinetics....................................................................................................83
7.9.1. Plasma for Analysis of PF-04965842.........................................................83
7.9.2.Shipment of Pharmacokinetic Samples......................................................84
8. ADVERSE EVENT REPORTING......................................................................................84
8.1. Requirements...........................................................................................................84
8.1.1. Additional Details on Recording Adverse Events on the CRF...................85
8.1.2. Eliciting Adverse Event Information..........................................................85
8.1.3. Withdrawal from the Study Due to Adverse Events (see also the 
Subject Withdrawal Section)...........................................................................85
8.1.4. Time Period for Collecting AE/SAE Information......................................86
8.1.4.1. Reporting SAEs to Pfizer Safety...............................................86
8.1.4.2. Recording Non-serious AEs and SAEs on the CRF.................86
8.1.5. Causality Assessment.................................................................................86
8.1.6. Sponsor’s Reporting Requirements to Regulatory Authorities..................87
8.2. Definitions...............................................................................................................87
8.2.1. Adverse Events...........................................................................................87
8.2.2. Abnormal Test Findings.............................................................................88
8.2.3. Serious Adverse Events..............................................................................88
8.2.4. Hospitalization............................................................................................89
8.3. Severity Assessment................................................................................................90
8.4. Special Situations....................................................................................................90
8.4.1. Protocol-Specified Serious Adverse Events...............................................90
8.4.2. Potential Cases of Drug-Induced Liver Injury............................................90
8.4.3. Exposure to the Investigational Product During Pregnancy or 
Breastfeeding, and Occupational Exposure.....................................................92
8.4.3.1. Exposure During Pregnancy......................................................92
8.4.3.2. Exposure During Breastfeeding................................................94
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8.4.3.3. Occupational Exposure .............................................................94
8.4.4. Medication Errors .......................................................................................94
8.4.4.1. Medication Errors......................................................................94
9. DATA ANALYSIS/STATISTICAL METHODS...............................................................95
9.1. Sample Size Determination.....................................................................................95
9.2. Efficacy Analysis ....................................................................................................95
9.2.1. Analysis Sets...............................................................................................95
9.2.2. Testing Procedure for Multiple Comparisons.............................................96
9.2.3. Analysis of the Primary Endpoints.............................................................97
9.2.4. Analysis of Secondary Endpoints...............................................................97
9.3. Safety Analysis........................................................................................................98
9.4. Analysis of Pharmacokinetic Endpoints .................................................................99
9.5. External Data Monitoring Committee.....................................................................99
9.6. Safety Adjudication Committees ............................................................................99
10. QUALITY CONTROL AND QUALITY ASSURANCE.................................................99
11. DATA HANDLING AND RECORD KEEPING ...........................................................100
11.1. Case Report Forms/Electronic Data Record .......................................................100
11.2. Record Retention.................................................................................................100
12. ETHICS............................................................................................................................101
12.1. Institutional Review Board/Ethics Committee....................................................101
12.2. Ethical Conduct of the Study ..............................................................................101
12.3. Subject Information and Consent........................................................................101
12.4. Reporting of Safety Issues and Serious Breaches of the Protocol or ICH 
GCP .........................................................................................................................102
13. DEFINITION OF END OF TRIAL.................................................................................103
13.1. End of Trial in All Participating Countries .........................................................103
14. SPONSOR DISCONTINUATION CRITERIA ..............................................................103
15. PUBLICATION OF STUDY RESULTS........................................................................103
15.1. Communication of Results by Pfizer ..................................................................103
15.2. Publications by Investigators ..............................................................................104
16. REFERENCES ................................................................................................................106

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LIST OF TABLES
Table 1.
Objectives and Endpoints:....................................................................................31
Table 2.
Investigational Product Administration................................................................49
Table 3.
Investigator’s Global Assessment (IGA) Score....................................................75
Table 4.
Clinical Sign Severity Scoring Criteria for the Eczema Area and Severity 
Index (EASI).........................................................................................................76
Table 5.
Handprint Determination of Body Surface Area (BSA).......................................77
Table 6.
Eczema Area and Severity Index (EASI) Area Score Criteria.............................77
Table 7.
Eczema Area and Severity Index (EASI) Body Region Weighting.....................77
LIST OF FIGURES
Figure 1.
Study Design Schematic.......................................................................................34
Figure 2.
Schematic for Multiple Testing Procedure...........................................................97
APPENDICES
Appendix 1. Abbreviations....................................................................................................110
Appendix 2. Diagnostic Criteria for Atopic Dermatitis.........................................................115
Appendix 3. Prohibited Concomitant Medications................................................................116
Appendix 4. Guidelines for Monitoring and Discontinuation ...............................................117
Appendix 5. Fitzpatrick Skin Type........................................................................................119
Appendix 6. Pruritus Severity and Frequency (Pruritus NRS)..............................................120
Appendix 7. Night Time Itch Scale .......................................................................................121
Appendix 8. Patient Global Assessment (PtGA)...................................................................122
Appendix 9. European Quality of Life 5-Dimension 5-Level Scale (EQ-5D-5L) and 
European Quality of Life 5-Dimension Youth Scale (EQ-5D-Y)......................123
Appendix 10. Dermatology Life Quality Index (DLQI) and Children’s Dermatology 
Life Quality Index (CDLQI)...............................................................................127
Appendix 11. Patient-Oriented Eczema Measure (POEM)...................................................129
Appendix 12. Hospital Anxiety and Depression Scale (HADS) ...........................................130
Appendix 13. Pruritus and Symptoms Assessment for Atopic Dermatitis (PSAAD) 
Symptom Diary...................................................................................................132
Appendix 14. SF-36v2, Acute ...............................................................................................136

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Appendix 15. Work Productivity and Activity Impairment Questionnaire: Atopic 
Dermatitis ...........................................................................................................142
Appendix 16. FACIT-F and Peds-FACIT-F..........................................................................144
Appendix 17. C-SSRS – Columbia Suicide Severity Rating Scale.......................................146
Appendix 18. SBQ-R – Suicide Behaviors Questionnaire – Revised ...................................149
Appendix 19. Patient Health Questionnaire – 8 items...........................................................150

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PROTOCOL SUMMARY
Background and Rationale:
Atopic dermatitis (AD), also known as atopic eczema, is a common, chronic, inflammatory
skin disorder characterized by flaky skin lesions, intense pruritus, and a general deterioration
in quality of life.  Over the past 50 years, AD has become more prevalent, especially in 
industrialized, temperate countries such as the United States (US).1,2 Earlier reports indicated 
that, in up to 70% of cases, the disease greatly improves or resolves by late childhood, 
however more recent findings suggest that disease activity remains manifest for a prolonged 
period of time.  Based on a total of 7157 patients enrolled in the Pediatric Eczema Elective 
Registry (PEER) study, comprising a total of 22,550 person-years, it was concluded that 
symptoms associated with AD seem to persist well into the second decade of a child’s life 
and likely longer.3  At every age, more than 80% of PEER study subjects had symptoms of 
AD and/or were using medication to treat their AD.
There are a limited number of treatments available for AD. Current treatments include 
emollients, topical corticosteroids (eg, betamethasone, clobetasol, fluocinonide), topical 
calcineurin inhibitors (eg, pimecrolimus, tacrolimus), and coal tar preparations.  Crisaborole 
was approved as a topical treatment in December 2016 by the Food and Drug Administration 
(FDA) for use in patients with mild to moderate AD.  Additional treatments generally 
reserved for severe AD include phototherapy (eg, ultraviolet A light [UVA] with or without 
psoralen, ultraviolet B light [UVB] narrowband or broadband) and systemic agents (eg, 
corticosteroids, cyclosporine, recombinant interferon gamma (IFN-, mycophenolate mofetil, 
methotrexate [MTX], azathioprine, intravenous immunoglobulin).4  Of the currently 
available therapies, none offers a cure; therefore, the main aims of existing treatments are to 
reduce the occurrence of acute flares, to increase the time between relapses, and to reduce 
pruritus and the resulting sleep disturbance.5,6
Other systemic agents to treat AD are under clinical development or recently approved.  
Dupilumab, an injectable human monoclonal antibody targeting interleukin (IL) -4 
and -13, was approved by the FDA in March 2017 and received marketing authorization in 
Europe in September 2017, and offers a novel mechanism of action for the treatment of 
moderate to severe AD.  However, the approved dosing for dupilumab as an initial dose of 
2 x 300 mg subcutaneous injections followed by 300 mg every other week injections may 
limit the desirability of this route of treatment.
Key cytokines implicated in the pathophysiology of AD include IL-4, IL-5, IL-13, IL-31,
and IFN-, require Janus kinase 1 (JAK1) for signal transduction; this suggests that selective
JAK1 inhibitors that modulate the activity of these cytokines represent a compelling
approach to the treatment of inflammatory skin diseases such as AD.7
PF-04965842 is an orally bioavailable small molecule that selectively inhibits JAK1 by
blocking the adenosine triphosphate (ATP) binding site. PF-04965842 has a high degree of
selectivity against other kinases: 28-fold selectivity over JAK2, >340-fold over JAK3 and 
43-fold over tyrosine kinase 2 (TYK2), as well as a good selectivity profile over the broader 
range of human kinases. The selective inhibition of JAK1 will lead to modulation of 

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multiple cytokine pathways involved in the pathophysiologyof AD,including
IL-4,IL-5,IL-13, IL-31 and IFN-.  Data from a Phase2b proof of concept (POC) study 
(B7451006) that evaluated subjects with moderate to severe AD have shown positive 
efficacy, as well as an acceptable safety profile, sufficient to support further clinical 
development in a larger Phase3 program.
Objectives and Endpoints  
Primary Objective:
To assess the efficacy of PF-04965842 compared with placebo in subjects aged 
12years and older with moderate to severe AD.
Secondary Objective:
To evaluate the effect of PF-04965842 on additional efficacy endpoints and 
patient-reported outcomes over time in subjects aged 12years andolder with 
moderate to severe atopic dermatitis.
Safety Objective:
To evaluate the safety and tolerability of PF-04965842 in subjects aged 12years and 
older with moderate to severe atopic dermatitis following 12weeks of treatment.
Pharmacokinetic Objective: 
To evaluate the pharmacokinetics (PK)of PF-04965842 in subjects aged 12years and 
older with moderate to severe atopic dermatitis following 12weeks of treatment.
 
 
 
Endpoints
Primary EfficacyEndpoints:
Response based on the Investigator’s Global Assessment (IGA) score of clear (0) or 
almost clear (1) (on a 5-point scale) and a reduction from baseline of 2points at 
Week 12.  The baseline will be defined as the IGA score on Day1 pre-dose;
Response based on the Eczema Area and Severity Index 75% improvement from 
baseline (EASI-75) response at Week12.  The baseline will be defined as the EASI 
score on Day1 pre-dose.  
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Key Secondary Efficacy Endpoints:
Response based on at least 4points improvement in the severity ofpruritus numerical 
rating scale (NRS) from baseline at Weeks2, 4, and 12;
Change from Baseline in Pruritus and Symptoms Assessment for Atopic Dermatitis 
(PSAAD) total scoreat Week12.
Secondary Efficacy Endpoints:
Response based on at least 4points improvement in the severity ofpruritus numerical 
rating scale (NRS) from baseline at all scheduled time points other than Weeks2, 4 
and 12; 
Time to achieve at least4pointsimprovement in the severity of pruritus NRS scale 
from baseline by Day 15;
Response based on the EASI-75 at all scheduled time points except Week12;
Response based on the IGA of clear (0) or almost clear (1) and 2point reduction 
from baseline at all scheduled time points except Week12.
Other Efficacy Endpoints:
Response based on a 50% and 90% improvement in the EASI total score 
(EASI-50and EASI-90) at all scheduled time points;
Change from baseline in the percentage Body Surface Area (BSA) affected at all 
scheduled time points;
Response based on a 50% and 75% improvement in Scoring Atopic Dermatitis 
(SCORAD) (SCORAD-50, SCORAD-75) from baseline at all scheduled time points;
Change from baseline at all scheduled time points in SCORAD-subjective 
assessments of itch and sleep loss.
 
 
 
 
 
 
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Safety Endpoints:
Incidence of treatment emergent adverse events;
Incidence of Serious Adverse Event (SAE)s and Adverse Event (AE)s leading to 
discontinuation;
The incidence of clinical abnormalities and change from baseline in clinical 
laboratory values, electrocardiogram (ECG) measurements, and vital signs.
Pharmacokinetic Endpoint:
Population PK characterization in subjects aged 12 years and olderwith moderate to 
severe atopic dermatitis. 
 
 
 
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Study Design
This is a randomized, double-blind, placebo-controlled, parallel-group, Phase 3 study to 
evaluate the efficacy and safety of PF-04965842 monotherapy in subjects aged 12 years and 
older with moderate to severe AD and a body weight 40 kg.  The treatment duration is 
12 weeks.  Subjects will be screened within 28 days prior to the first dose of investigational 
product to confirm that they meet the subject selection criteria for the study.  A total of 
approximately 375 subjects will be enrolled from approximately 85 sites located globally.  
Adolescent subjects below the age of 18 years old (or country-specific age of majority) will
only be enrolled in this study if instructed by the sponsor and approved by the country or 
regulatory/health authority.  If these approvals have not been granted, only subjects aged 
18 years (or country-specific age of majority) and older will be enrolled.
Qualified subjects completing the 12 week treatment period of the study will have the option 
to enter a long-term extension (LTE) study B7451015.  Subjects discontinuing early from 
treatment, or who are otherwise ineligible for the LTE study will undergo a 4 week follow-up 
period in B7451013.
Subjects who have chronic moderate to severe AD as defined per the inclusion criteria will 
be randomized to receive 200 mg or 100 mg PF-04965842 once daily (QD), or matching 
placebo.  Investigators, subjects, and the sponsor study team will be blinded as to treatment 
group.
After providing informed consent, subjects will be assessed for study eligibility at the 
screening visit.  For subjects younger than 18 years old (or country-specific age of majority),
their parent(s)/legal guardian will provide supplementary or sole written consent and minor 
children will provide assent, according to local regulations and rules regarding ability to give 
assent and consent.  Subjects will undergo screening within 28 days prior to randomization.  
During the screening period, treatments for AD will be washed out, as applicable, according 
to eligibility requirements.  Subjects may be re-screened once if they fail the screening 
evaluation for reasons related to incidental transitory conditions, unless the reason for the 
screen failure is the disease severity inclusion criteria. 
Subjects who continue to meet eligibility criteria at baseline will undergo Day 1/baseline 
assessments and be randomized in a 2:2:1 ratio to receive 200 mg PF-04965842 (N=150) or 
100 mg PF-04965842 QD (N=150) or matching placebo (N=75) from Day 1. 
Randomization will be stratified by baseline disease severity (moderate [IGA = 3] vs. severe 
[IGA = 4] AD), and, age <18 and 18.  Eligible subjects must have a documented history of 
inadequate response or intolerance to treatment with topical AD medications or have required 
systemic therapies for control of their disease.
Study Treatments

Doses of PF-04965842 will be 200 mg or 100 mg taken QD orally, or matching 
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
Treatment duration will be 12 weeks (randomized period).

Subjects who do not enroll into the long term extension study, B7451015, will enter a 
4 week follow-up post treatment period.
Statistical Methods
A total sample of 375 subjects, with 150 on PF-04965842 200 mg QD, 150 on PF-04965842 
100 mg QD and 75 on placebo (2:2:1 randomization) would provide at least 95% power to 
detect a difference of at least 20% in IGA response rate between PF-04965842 200 mg QD 
(or PF-04965842 100 mg QD) and placebo, assuming the placebo response rate is 6% at 
Week 12.
Furthermore, this will also provide at least 99% power to detect a difference of at least 
30% in EASI-75 response rate between PF-04965842 200 mg QD (or PF-04965842 100 mg 
QD) and placebo, assuming the placebo response rate is 15% at Week 12.
These two endpoints are co-primary and both must achieve statistical significance to meet the 
primary objective.
There are five key hypotheses to be tested for each of the two PF-04965842 doses 
(200 mg QD and 100 mg QD) versus placebo, for the co-primary endpoints and two key 
secondary endpoints.  For these hypotheses, the familywise Type-I error rate will be strongly 
controlled at 5% using a sequential, Bonferroni-based iterative multiple testing procedure.  
This is described in further detail in the statistical analysis section of the protocol and in the 
statistical analysis plan (SAP).
For analysis of the co-primary endpoints, the (Cochran-Mantel-Haenszel) test adjusted by 
randomization strata (baseline disease severity and age) will be used.  If a subject withdraws 
from the study, then this subject will be counted as a non-responder for endpoints after 
withdrawal. 
For continuous endpoints, a mixed-effect model with repeated measures (MMRM) will be 
used.  This model will include the factors (fixed effects) for treatment group, randomization 
strata (age group, disease severity), visit, treatment-by-visit interaction, and relevant baseline 
value.  Within the framework of MMRM, the treatment difference will be tested at the 
pre-specified primary time point, Week 12, as well as at the other time points by time 
point-specific contrasts from the MMRM model.
All subjects who receive investigational product (safety population) will be included in the 
safety analyses.  All the safety data will be summarized descriptively through appropriate 
data tabulations, descriptive statistics, categorical summaries, and graphical presentations.

PF-04965842
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Page 18
SCHEDULE OF ACTIVITIES
The schedule of activities table provides an overview of the protocol visits and procedures.  Refer to the STUDY PROCEDURES and 
ASSESSMENTS sections of the protocol for detailed information on each procedure and assessment required for compliance with the 
protocol. 
The investigator may schedule visits (unplanned visits) in addition to those listed on the schedule of activities table, in order to 
conduct evaluations or assessments required to protect the well-being of the subject.
Visit Identifiera
Day -28
Screening
Day 1
Week 0
Baseline
Day 8
Week 1
Call
Day 15
Week 2
Day 29
Week 4
Day 43
Week 6
Call
Day 57
Week 8
Day 85
Week 12 
(EOT/ET) 
EOS, 
Follow- up
Week 16
(4 Weeks 
after EOT or 
ET)
Visit 1
Visit 2
Visit 3
Visit 4
Visit 5
Visit 6
Visit 7
Visit 8
Visit 9
Visit Window
None
None
1 Day 
1 Days
2 
Days
3 Days 3 Days
3 Days
3 Days
Enrollment Procedure
Informed consent
X
Register subject using IRT system
X
Inclusion/Exclusion Criteria
X
X
Demographics, Medical History, Tobacco 
and Alcohol History, Atopic Dermatitis 
Disease Historyb
X
Review Prior/Concomitant Medications & 
Treatments
X
X
X
X
X
X
X
X
X
Dispense e-Diary and instruct subjects on use
X
Provide Patient Emergency Contact Card
X
Medical Procedures
Complete Physical Examc
X
X
X
Targeted Physical Examc
X
X
X
X
Vital Signsd
X
X
X
X
X
X
X
Additional Blood Pressure and Pulse Rate 
(post dose)d
X
X
Weight
X
X
X
Height
X
X
Chest X-raye
X

PF-04965842
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Final Protocol Amendment 3, 06 December 2018
Page 19
Visit Identifiera
Day -28
Screening
Day 1
Week 0
Baseline
Day 8
Week 1
Call
Day 15
Week 2
Day 29
Week 4
Day 43
Week 6
Call
Day 57
Week 8
Day 85
Week 12 
(EOT/ET) 
EOS, 
Follow-up
Week 16
(4 Weeks 
after EOT or 
ET)
Visit 1
Visit 2
Visit 3
Visit 4
Visit 5 Visit 6
Visit 7
Visit 8
Visit 9
Visit Window
None
None
1 Day 
1 Days
2 
Days
3 Days3 Days
3 Days
3 Days
ECG (12-lead)
Xf
X
X 
X
X 
X
X
Laboratory Assessments 
Serum chemistry and hematology (including 
coagulation panel)
g
X
X
X 
X
X 
X
X
Lipid Panel
g
X
X
X
X
Urinalysis
X
X
X 
X
X 
X
X
Serum FSH (WONCBP only) or Pregnancy 
Testh
X
Urine Pregnancy Test (conducted at study 
site)
i
X
X 
X
X 
X
X
HIVTestingk
X
HepatitisB Surface Antigen (HBsAg), 
Hepatitis B Surface Antibody (HBsAb), 
Hepatitis B Core Antibody (HBcAb), 
Hepatitis C Antibody (HCV Ab), Hepatitis 
C Viral RNA (HCV RNA)l
X
HBV DNA (for China, Japan and Republic 
of Koreaonly)bb
X
X
Varicella Zoster Virus (VZV IgG Ab) 
(adolescents only, if applicable)
m
X
Tuberculosis Testn
X
Pharmacokinetic 
Pharmacokinetic Blood Sampling (Pre-dose)o
X
Pharmacokinetic Blood Sampling 
(Post-dose)p
X
Trial Treatment 
Randomization 
X
Drug Dispensing
X
X
X
Investigational Product Accountability  
X 
X
X 
X
C
C
I

PF-04965842
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Final Protocol Amendment 3, 06 December 2018
Page 20
Visit Identifiera
Day -28
Screening
Day 1
Week 0
Baseline
Day 8
Week 1
Call
Day 15
Week 2
Day 29
Week 4
Day 43
Week 6
Call
Day 57
Week 8
Day 85
Week 12 
(EOT/ET) 
EOS, 
Follow- up
Week 16
(4 Weeks 
after EOT or 
ET)
Visit 1
Visit 2
Visit 3
Visit 4
Visit 5
Visit 6
Visit 7
Visit 8
Visit 9
Visit Window
None
None
1 Day 
1 Days
2 
Days
3 Days 3 Days
3 Days
3 Days
Investigational Treatment Administrationq
      X---------------------------------------------------------------------------------------------X
Review eDiary to assess completion
X
X
X
X
X
X
Assess eligibility for B7451015r
X
Clinical Assessments 
Fitzpatrick Skin Type Assessment
X
Investigator’s Global Assessment (IGA)
X
X
X
X
X
X
X
SCORing Atopic Dermatitis (SCORAD)
X
X
X
X
X
X
X
Eczema Area and Severity Index (EASI)
X
X
X
X
X
X
X
Body Surface Area (BSA from EASI) 
X
X
X
X
X
X
X
C-SSRSs
X
SBQ-Rs
X
PHQ-8s
X
Photography of representative AD lesionst
X
X
X
X
X
X
Patient-reported Outcome 
Pruritus Numerical Rating Scale (NRS)u
X------------------X
X-----------------------------------------X
X
X
X
X
Night Time Itch Scaleu
X------------------X
X-----------------------------------------X
X
X
X
X
Pruritus and Symptoms Assessment for 
Atopic Dermatitis (PSAAD)v
X -----------------X
X---------------------------------------------------------------------------------------------------------------------X
Patient Global Assessment (PtGA)
X
X
X
X
X
X
Dermatology Life Quality Index (DLQI or 
CDLQI)w
X
X
X
X
X
X
Patient-Oriented Eczema Measure (POEM)
X
X
X
X
X
X
Hospital Anxiety and Depression Scale 
(HADS)
X
X
X
X
X
X
EQ-5D-5L (adults) or EQ-5D-Y (ages 12-17 
years)
X
X
X
X
X
X
SF-36v2, Acutex
X
X
X
Work Productivity and Activity Impairment 
Questionnaire: Atopic Dermatitis 
(WPAI:AD)x
X
X
X
FACIT-F or Peds-FACIT-Fy
X
X
X

PF-04965842
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Final Protocol Amendment 3, 06 December 2018
Page 21
Visit Identifiera
Day -28
Screening
Day 1
Week 0
Baseline
Day 8
Week 1
Call
Day 15
Week 2
Day 29
Week 4
Day 43
Week 6
Call
Day 57
Week 8
Day 85
Week 12 
(EOT/ET) 
EOS, 
Follow- up
Week 16
(4 Weeks 
after EOT or 
ET)
Visit 1
Visit 2
Visit 3
Visit 4
Visit 5
Visit 6
Visit 7
Visit 8
Visit 9
Visit Window
None
None
1 Day 
1 Days
2 
Days
3 Days 3 Days
3 Days
3 Days
Safety
Serious and non-serious adverse event 
monitoring
X
X
X
X
X
X
X
X
X
Contraception Checkz
X
X
X
X
X
X
X
X
X
Serum Sample for Baseline Viral Screenaa
X
Abbreviations: AD = atopic dermatitis; BSA = body surface area; CDLQI = Children’s Dermatology Life Quality Index; C-SSRS = Columbia Suicide Severity 
Rating Scale; DLQI = Dermatology Life Quality Index; EASI = Eczema Area and Severity Index; ECG = electrocardiogram; EOS = End of Study; EOT = End 
of Treatment; ET = early termination; EQ-5D-5L = EuroQol Quality of Life 5-Dimension 5-Level Scale; EQ-5D-Y = EuroQol Quality of Life 5-Dimension, 
Youth Scale; FACIT-F = Functional Assessment of Chronic Illness Therapy Fatigue Scale; FSH = follicle stimulating hormone; GGT = gamma-glutamyl 
transferase; HADS= Hospital Anxiety and Depression Scale; HBsAg = hepatitis B surface antigen; HBsAb = hepatitis B surface antibody; HBcAb = hepatitis B 
core antibody; HBV DNA = hepatitis B virus deoxyribonucleic acid; HCVAb = hepatitis C antibody; HCV RNA = Hepatitis C Viral RNA; HIV = human 
immunodeficiency virus; HSV-1 = herpes simplex virus type 1; HSV2 = herpes simplex virus type 2; IGA = Investigator’s Global Assessment; IRT = Interactive 
Response System; LLQ = lower limit quantification; NRS = numerical rating scale; Peds-FACIT-F = Pediatric Functional Assessment of Chronic Illness Therapy 
Fatigue Scale; PHQ-8 = Patient Health Questionnaire 8 items; POEM = Patient-Oriented Eczema Measure; PSAAD = Pruritus and Symptoms Assessment for 
Atopic Dermatitis; PtGA = Patient Global Assessment; RNA = Ribonucleic acid; SBQ-R = Suicide Behaviors Questionnaire-Revised; SCORAD = SCORing 
Atopic Dermatitis; SF-36v2 = Short Form-36 Health Survey Version 2;VZV = varicella zoster virus; VZV IgG Ab = varicella zoster virus immunoglobulin G 
antibody; WPAI:AD = Work Productivity and Activity Impairment Questionnaire: Atopic Dermatitis; WONCBP = women of non-childbearing potential.
a.
Day relative to start of study treatment (Day 1).
b.
Atopic Dermatitis Disease History includes collection of details of AD: AD diagnosis and duration, the use of topical treatments, systemic treatments and 
other treatments for AD. 
c.
Complete physical examinations must be performed by the investigator, sub investigator or a qualified health professional per local guidelines.  Complete 
physical examinations consist of assessments of general appearance; skin; head, eyes, ears, nose and throat (HEENT); mouth, heart; lungs; breast (optional); 
abdomen; external genitalia (optional); extremities; neurologic function; and lymph nodes.  Targeted physical examinations must be performed by the 
investigator, sub-investigator or a qualified health professional per local guidelines and should include skin, heart, lungs, and abdomen and examination of 
body systems where there are symptom complaints by the subject.
d.
Vital Signs include sitting blood pressure, pulse rate, respiratory rate, and temperature measured after at least 5 minutes of rest.  All vital signs at baseline 
and Week 12 must be performed prior to administration of investigational product and additional blood pressure and pulse rate assessments must be 
performed at least 1 hour following administration of investigational product.  All vital signs at all other on-site visits must be performed at least 1 hour 
following administration of investigational product.  

PF-04965842
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Page 22
e. Chest X-ray or other appropriate diagnostic image (ie, CT or MRI) may be performed up to 12weeks prior to Day1.  Chest X-rays (posterior-anterior and 
lateral views) are required for adults and recommended for adolescents as per local guidelines and standard of care.Official reading must be located and 
available in the source documentation.
f. A single 12-lead ECG will be performed at screening and all other on-site visits and interpreted by a central reader.  Clinically significant or exclusionary 
ECG findings at the screening or baseline visits will require screen failure.  
g. Serum chemistry includes: blood urea nitrogen (BUN), serum creatinine, creatine phosphokinase, glucose, Ca++, Na+, K+, Cl-, total CO2, aspartate 
aminotransferase (AST), alanine aminotransferase (ALT), gamma-glutamyl transferase (GGT), total, indirect and direct bilirubin, alkaline phosphatase, 
lactate dehydrogenase, uricacid, albumin and total protein.  The lipid profile panel will include total cholesterol, low-density lipoprotein(LDL), 
high-density lipoprotein(HDL), and triglycerides.  A minimum of 8-hour fasting is required for lipid profile evaluation at Day1, Week4, Week12 and EOS 
visits.  Hematology includes: Hemoglobin, hematocrit, red blood cell count and indices (MCH, MCHC, MCV, RBC Morphology), WBC count with 
differential,totalneutrophils (%,absolute), lymphocytes (%, absolute), monocytes (%, absolute), eosinophils (%, absolute), basophils (%, absolute), 
platelets, reticulocyte count and coagulation panel.  Coagulation panel includes: Activated Partial Thromboplastin Time (APTT), Prothrombin 
Time/International Normalized Ratio (PT/INR).  Laboratory tests with abnormal results (perSection 6.1andSection 7.6.2)may be repeated once during the 
screening period; the last value will be used to determine eligibility. 
h. Serum pregnancy testing at screening is required for women of childbearing potential, including adolescents aged 12 years and older, regardless of whether 
they have experienced menarche.  Follicle stimulating hormone (FSH) test to be performed at Screening to confirm postmenopausal status in female subjects 
who have been amenorrheic for at least 12consecutive months.
i. Urine pregnancy test must be performed prior to dosing with the investigational product for female subjects of childbearing potential, including adolescents 
aged 12 years and older, regardless of whether they have experienced menarche. 
k. HIV testing will be performed for all subjects. Subjects who are positive for HIV will be screen-failed.
l. HBsAb reflex testingwill be performed only if HBsAg negative but HBcAb positive. Subjects who are positive for HCVAb and HCV RNA will be 
screen-failed.
m. VZV IgG antibody testing is required to confirm eligibility in adolescent subjects who have not received at leastone dose of a varicella vaccine.
n. A documented TB test performed within 12weeks prior to Day1 is acceptable.  Subjects with a history of tuberculosis may not require TB testing as per the 
protocol exclusion criteria in Section4.2.  Perform TB test procedure using the QuantiFERON-TB Gold In Tube Test (or Purified Protein Derivative).  A 
negative PPD test can be substituted for the QuantiFERON-TB Gold In-Tube test only if the central laboratory is unable to perform the 
QuantiFERON-TB Gold In-Tube test or cannot determine the results to be positive or negative and the Pfizer Medical Monitor approves it on a 
case-by-case basis.  In addition to protocol required TB testing, sitesshould follow their local standards for TB status determination, which may include 
chest X-ray.  SeeSection 7.3.3. For Japan only: While QuantiFERONis the preferred testing method, the T-SPOT.TBtest is acceptable as the screening 
TB test.T-SPOT.TBtesting will be performed at the site’s local laboratory.  Borderline results from the T-SPOT.TBtest should be considered 
exclusionary. If the test results are indeterminate, the test should be repeated.  If the result of the repeat test is indeterminate,subjects may be screened using
the Mantoux/PPD skin testwith Pfizer Medical Monitor approval. SeeSection 7.3.4.
o. A pharmacokinetic (PK) blood sample will be collected 2.0 hours (30min)prior to dosing at the study site on Week8.
p. PK blood samples will be collected at 1.0 hour (15min) and 2.0hours (30min) post-dose at the Week12 visit (EOT/ET). If the ET visit occurs after 
Week 8, collect PK samples only if the subject takes the investigational product at the site visit. 
q. Subjects should take the medication from study Days1 to 85.  Subjects will be encouraged to take the medication in the morning whenever possible; 
however, at study visit days, subjects are to be instructed to refrain from dosing at home, and are to take the dose in the clinic.
C
C
I

PF-04965842
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Page 23
r.
Subjects who complete EOT will be assessed for eligibility for participation in long-term extension study B7451015 as noted in Section 6.2.7. 
s.
Site staff is to administer the C-SSRS, SBQ-R and PHQ-8 to all subjects at screening and score immediately.  Subjects who have recent or active suicidal 
ideation or behavior or clinically significant depression will be excluded from the study or discontinued from the study per Section 4.2, Section 7.5.1, 
Section 7.5.2 and Section 7.5.3. For subjects meeting exclusionary results on the C-SSRS, SBQ-R and PHQ-8, it is recommended the subject’s primary care 
physician (PCP) should be informed, and the subject referred to a mental health professional, either by the PCP or the investigator according to their usual 
practice.
t.
For subjects at selected study sites, photographs of treated AD will be obtained. Photographs will be utilized for illustrative purposes and not evaluated as an 
endpoint (see Section 7.7.5).  
u.
Pruritus Numerical Rating Scale (NRS) and Night Time Itch Scale will be assessed using an eDiary, daily during the screening period and from Day 1 to 15.  
After Day 15, the pruritus NRS and Night Time Itch Scale will be completed only on study visit days in the eDiary. At the Screening visit, site staff will 
dispense the ePRO device and review instructions for completion of the subject eDiary for the NRS and Night Time Itch Scale. At every visit, the study 
coordinator will review the eDiary for completeness and counsel the subject on how to complete the items in the daily eDiary, if needed. 
v.
Pruritus and Symptoms Assessment for Atopic Dermatitis (PSAAD) will be conducted to assess the severity and frequency of pruritus, symptoms and sleep 
collected daily in a subject e-diary during the screening period and from Day 1 through the End of Study visit in selected countries (See Section 7.8.8).  At 
the Screening visit, site staff will dispense the ePRO device and review instructions for completion of the subject eDiary for the PSAAD questionnaire.  
Subjects will be asked to record their assessment in their eDiary once a day before taking the investigational product.  At every visit, the study coordinator 
will review the eDiary for completeness and counsel the subject on how to complete the items in the daily eDiary, if needed. 
w.
DLQI will be completed by adult subjects only.  Adolescents 12-17 years of age will complete the CDLQI instead. 
x.
SF-36v2 and WPAI:AD will be completed by adult subjects only.  Adolescents 12-17 years of age will not complete these assessments.
y.
FACIT-F will be completed by adult subjects only.  Adolescents 12-17 years of age will complete the Peds-FACIT-F instead. 
z.
The contraception check is an opportunity to confirm that contraception, if assigned, is used consistently and correctly.  It also facilitates continual 
reassessment of child-bearing potential in women.  This allows for implementing necessary changes to contraception; for example, investigators may need to 
ensure alternative contraceptive methods if new concomitant disease contraindicates a selected method of contraception, or if a subject is demonstrably no 
longer of child-bearing status (as per protocol) then they will no longer require contraception.  Continual reassessment of contraceptive needs is imperative.
aa. A serum sample will be collected at baseline but analyzed only if the subject has suspected varicella or herpes zoster.  In that event, the sample would be 
analyzed for HSV1, HSV2 and VZV. 
bb. For China and Republic of Korea only: Subjects who are HBsAg negative, HBcAb positive, HBsAb positive at screening will have reflex testing for HBV 
DNA. Subjects who are HBV DNA negative or below LLQ will have repeat HBV DNA repeated at Week 12 or early termination.   
For Japan only: In addition to HBsAg and HBcAb, HBsAb testing will be performed at Screening for all subjects rather than as a reflex test. Subjects with 
negative results for HBsAg, HBcAb and HBsAb may be eligible.  Subjects who are HBsAg negative, HBcAb negative and HBsAb positive and provide 
documentation of prior HBV vaccination may be eligible and will not require HBV DNA monitoring during the study. Subjects who are HBsAg negative, 
HBcAb negative and HBsAb positive without documentation of prior HBV vaccination AND subjects who are HBsAg negative, HBcAb positive, and 
HBsAb positive at screening will have reflex testing for HBV DNA.  Subjects who are HBV DNA negative or below LLQ may be randomized but will have 
HBV DNA repeated at Week 12 or early termination.

PF-04965842
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1. INTRODUCTION
1.1. Mechanism of Action/Indication
PF-04965842 is a Janus kinase 1 (JAK1) inhibitor that is being investigated as a treatment for 
patients with Atopic Dermatitis (AD). 
The Janus kinase (JAK) family, including JAK1, JAK2, JAK3 and tyrosine kinase 2 (TYK2), 
is a group of cytoplasmic tyrosine kinases that mediate signal transduction via interactions 
with Type 1 and Type 2 cytokine receptors critical for leukocyte activation, proliferation, 
survival and function.  Cytokine receptors demonstrate restricted association with JAKs such 
that different receptors or receptor classes preferentially utilize a given JAK dimer or trimer 
combination to transduce their signal.  JAK1 pairs with JAK3 to mediate -common cytokine 
signaling and also with JAK2 or TYK2 to transmit the signals of additional cytokines 
important in inflammation and immune responses including interleukin 
(IL) -4, -5, -6, -13,-21, -31, interferon gamma (IFN-), and interferon alpha (IFN-).  JAK2 
homodimers are critical for the signaling of hematopoietic cytokines and hormones including 
erythropoietin (EPO), IL-3, granulocyte-macrophage colony-stimulating factor (GM-CSF) 
and prolactin. 
IL-12 and IL-23 are dependent on TYK2 and JAK2 for transmitting their signals.  Following 
cytokine activation, receptor-associated JAKs are phosphorylated and in turn phosphorylate 
specific sites on the receptor intracellular domain.  Phosphorylation of specific sites on the 
intracellular domain of the receptor allows for the recruitment of signal transducers and 
activators of transcription (STATs) that can subsequently be phosphorylated by JAKs.  
Phosphorylated STAT molecules are released from the receptor, translocate to the nucleus 
where they bind to specific sites on the deoxyribonucleic acid (DNA) and regulate gene 
transcription. 
Key cytokines implicated in the pathophysiology of AD include IL-4, IL-5, IL-13, IL-31,
and IFN-, require JAK1 for signal transduction; this suggests that selective JAK1 inhibitors 
that modulate the activity of these cytokines represent a compelling approach to the 
treatment of inflammatory skin diseases such as AD.7
PF-04965842 is an orally bioavailable small molecule that selectively inhibits JAK1 by 
blocking the ATP binding site.  PF-04965842 has a high degree of selectivity against other 
kinases: 28-fold selectivity over JAK2, >340-fold over JAK3 and 43-fold over TYK2, as 
well as a good selectivity profile over the broader range of human kinases. The selective 
inhibition of JAK1 will lead to modulation of multiple cytokine pathways involved in the 
pathophysiology of AD, including IL-4, IL-5, IL-13, IL-31 and IFN-.  Data from a Phase 2b 
proof of concept (POC) study (B7451006) that evaluated subjects with moderate to severe 
AD have shown positive efficacy, as well as an acceptable safety profile, sufficient to support 
further clinical development in a larger Phase 3 program.

PF-04965842
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Page 25
1.2. Background and Rationale
1.2.1. Drug Development and Rationale
PF-04965842 is being developed as an oral treatment for patients with moderate to severe 
AD based on its mechanism of action, and the clinical results obtained in Phase 1 and 
Phase 2 studies.  The clinical development program for PF-04965842 includes healthy 
volunteers, subjects with psoriasis and subjects with AD.  
Additional information for this compound may be found in the single reference safety 
document (SRSD), which for this study is the Investigator’s Brochure (IB). 
1.2.2. Atopic Dermatitis
Atopic dermatitis, also known as atopic eczema, is a common, chronic, inflammatory skin 
disorder characterized by flaky skin lesions, intense pruritus, and a general deterioration in 
the quality of life.  Over the past 50 years, AD has become more prevalent, especially in 
industrialized, temperate countries such as the US.1,2  AD is one of the most common, 
chronic, relapsing childhood dermatoses, impacting 15-30% of all children in the US and 
many have disease that persists into adulthood with a lifetime prevalence of those affected in 
childhood reported to be 34%.8 Earlier reports indicated that, in up to 70% of cases, the 
disease greatly improves or resolves by late childhood, however more recent findings suggest 
that disease activity remains manifest for a prolonged period of time.  Based on a total of 
7157 patients enrolled in the Pediatric Eczema Elective Registry (PEER) study, comprising a 
total of 22,550 person-years, it was concluded that symptoms associated with AD seem to 
persist well into the second decade of a child’s life and likely longer.3  At every age, more 
than 80% of PEER study subjects had symptoms of AD and/or were using medication to treat 
their AD.  In 833 AD patients who were aged 20 years or older when they visited the clinic 
and 45 years or older when they responded to a follow-up questionnaire, 59% responded that 
they had defined persistent AD at some time during the last 12 months.9
The majority of studies conducted across multiple age groups suggest a continued decrease in 
prevalence with older age.10  Adult-onset AD does also occur, though it is less common.  The 
prevalence of AD in adults is estimated to be 10%.11 Recent studies have indicated that 
adults with AD are more likely to smoke cigarettes, drink alcohol, and have a sedentary 
lifestyle, potentially associated with increased comorbidities, such as asthma and 
cardiovascular disease.12
Although great strides have been made in understanding the causes, the complex 
pathophysiology of AD is still not completely understood.  It has been established that the 
pathophysiology of AD includes a defective skin barrier function, allergic responses, 
defective antimicrobial immune defense, and a genetic predisposition.  The predominant 
symptom of AD, pruritus and the resulting scratching, typically sets off an amplification 
cycle of atopic skin inflammation.  Activation of T lymphocytes, dendritic cells, 
macrophages, keratinocytes, mast cells, and eosinophils results in a release of numerous 
pro-inflammatory cytokines and chemokines.  This amplification cycle sustains the 
inflammatory responses characteristic of the AD lesions.13

PF-04965842
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Page 26
Acute AD lesions have been associated with the Type 2 helper T cell (TH2) phenotype, 
showing dominance of IL-4, -5, -13, and -31 secretion.7,13,14 Recent research showed that a 
small increase of Type 1 helper T cell (TH1)-associated genes has been also detected in acute 
phase.15
While IL-4-producing TH2 cells may drive the development of atopic skin lesions, chronic 
lesions show either the coexistence of both IL-4-producing TH2 and IFN--producing TH1 
cells or TH1 dominance.13 This coexistence of TH2 and TH1 responses or TH1 dominance 
is more likely to be the underlying immunopathology in adult patients who have had AD 
chronically or intermittently since childhood.  Recent evidence also supports IL-31’s role in 
pruritus and inflammation in AD.7,14
There are a limited number of treatments available for AD.  Current treatments for AD 
include emollients, topical corticosteroids (eg, betamethasone, clobetasol, fluocinonide), 
topical calcineurin inhibitors (eg, pimecrolimus, tacrolimus), and coal tar preparations.  
Crisaborole was approved as a topical treatment in December 2016 by the FDA for use 
in patients with mild to moderate AD.  Additional treatments generally reserved for severe 
AD include phototherapy (eg, ultraviolet A light [UVA] with or without psoralen, 
ultraviolet B light [UVB] narrowband or broadband) and systemic agents (eg, corticosteroids, 
cyclosporine, recombinant IFN-, mycophenolate mofetil, methotrexate [MTX], 
azathioprine, intravenous immunoglobulin).4  Of the currently available therapies, none 
offers a cure; therefore, the main aims of existing treatments are to reduce the occurrence of 
acute flares, to increase the time between relapses, reduce pruritus and the resulting sleep 
disturbance.5,6  
Currently available therapies for the treatment of AD have multiple limitations.  The topical 
therapies have drawbacks related to the duration of use due to the potential for local and 
systemic side effects (eg, corticosteroid use is limited to 2 to 4 weeks) and to the body 
regions of use (eg, mid-high potency corticosteroids are not approved for use on the face 
and/or intertriginous areas).  For AD patients not responding to topical therapies and 
phototherapy, off-label use of systemic agents, which include oral corticosteroids or oral 
immunosuppressants, remain the last viable treatment option.  Systemic therapy options are 
associated with potentially severe adverse effects and require careful monitoring.  The risk of 
toxicity and side effects remain a concern when systemic agents are used.  For these reasons 
the use of these agents is limited to short courses or intermittent therapy.  
Other systemic agents to treat AD are under clinical development or recently approved.  
Dupilumab, an injectable human monoclonal antibody targeting interleukin (IL) -4 
and -13, was approved by the FDA in March 2017 and received marketing authorization in 
Europe in September 2017, and offers a novel mechanism of action for the treatment of 
moderate to severe AD. However, the approved dosing for dupilumab as an initial dose of 
2 x 300 mg subcutaneous injections followed by 300 mg every other week injections may 
limit the desirability of this route of treatment.
Therefore, the predominant unmet medical need is an oral therapy with an acceptable safety 
profile for long term use which is effective for refractory AD.  

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As mentioned above, a variety of pro-inflammatory cytokines such as IL-4, IL-13, IL-22, 
IL-31 and IFN-, have been suggested to have a role in the pathogenesis of AD.  Many of 
these pathogenic cytokines use the JAK1 for signaling.  Therefore, JAK1 is an attractive 
therapeutic target for AD.
1.2.3.Non-Clinical and Phase 1 Data 
Data from nonclinical and Phase 1 programs supports the planned clinical trials with 
PF-04965842 and further information is in the current version of the IB.
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2.STUDY OBJECTIVES AND ENDPOINTS
Study objectives and corresponding endpoints are provided in Table1. 
Table1.
Objectives and Endpoints:
Primary Objective
Primary Endpoints
To assess the efficacy 
of PF-04965842 
compared with placebo 
in subjects aged 
12years and older with 
moderate to severe AD.
The following co-primary endpoints will be tested:

Response based on the Investigator’s Global Assessment (IGA) score of clear (0) or 
almost clear (1) (on a 5 point scale) and a reduction from baseline of 2points at 
Week12.  The baseline will be defined as the IGA score on Day1 pre-dose;

Response based on the Eczema Area and Severity Index 75% improvement from 
baseline (EASI-75) response at Week12. The baseline will be defined as the EASI score 
on Day1 pre-dose.
Secondary Objective
Secondary Endpoints
To evaluate the effect of 
PF-04965842 on 
additional efficacy 
endpoints and patient 
reported outcomes over 
time in subjects aged 
12years and older with 
moderate to severe 
atopic dermatitis.
Key Secondary Endpoints:

Response based on at least 4points improvement in the severity of pruritus numerical 
rating scale (NRS) from baseline at Weeks2, 4, and 12;

Change from Baseline in Pruritus and Symptoms Assessment for Atopic Dermatitis 
(PSAAD) total score at Week12. 
Secondary Efficacy Endpoints:

Response based on at least 4points improvement in the severity of pruritus numerical 
rating scale (NRS) from baseline at all scheduled time points other than Weeks2, 4 and 
12;  

Time to achieve at least4pointsimprovement in the severity of pruritus NRS scale from 
baseline by Day 15;

Response based on the EASI-75 at all scheduled time points except Week12; 

Response based on the IGAofclear (0) or almost clear (1) and 2point reduction from 
baseline at all scheduled time points except Week12.
Other Efficacy Endpoints:

Response based on a 50%and 90% improvement in the EASI total score (EASI-50
and EASI-90) at all scheduled time points;

Change from baseline in the percentage Body Surface Area (BSA) affected at all 
scheduled time points;

Response based on a 50% and 75% improvement in SCORAD (SCORAD50, 
SCORAD75) from baseline at all scheduled time points;

Change from baseline at all scheduled time points in SCORAD subjective assessments of 
itch and sleep loss.
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Safety Objective
Safety Endpoints
To evaluate the safety 
and tolerability of 
PF-04965842 in 
subjects aged 12years 
and older with moderate 
to severe atopic 
dermatitis following 
12weeks of treatment.

Incidence of treatment emergent adverse events;

Incidence of SAEs and AEs leading to discontinuation;

The incidence of clinical abnormalities and change from baseline in clinical laboratory 
values, ECG measurements, and vital signs.
PK Objective
PK Endpoint
To evaluate the PK of 
PF-04965842 in 
subjects aged 12years 
and older with moderate 
to severe atopic 
dermatitis following 
12weeks of treatment.

Population PK characterization in subjects aged 12 years and olderwith moderate to 
severe atopic dermatitis.
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Exploratory 
Objectives

Exploratory Endpoints
 
 
 
 
 
 
 
 
 
 
 
 
 
 
AD = Atopic dermatitis; AE = Adverse Event; BSA = Body Surface Area ; CDLQI = Children’s Dermatology Life 
Quality Index; DLQI=Dermatology Life Quality Index; EASI = Eczema Area and Severity Index; ECG = 
Electrocardiogram;EQ-5D-5L = EuroQol; Quality of Life measure; 5-Dimension 5-Level Scale; EQ-5D-Y = EuroQol 
Quality of Life 5-Dimension Youth Scale; FACIT-F  = Functional Assessment of Chronic Illness Therapy Fatigue Scale; 
Peds-FACIT-F = Pediatric FACIT-F; HADS = HospitalAnxiety and Depression Scale; IGA = Investigator’s Global 
Assessment; NRS = pruritus numerical rating scale; PK = pharmacokinetics; SCORAD = Scoring Atopic Dermatitis; 
POEM=Patient-Oriented Eczema Measure; PtGA = Patient Global Assessment; PSAAD = Pruritus and Symptoms 
Assessment for Atopic Dermatitis; SF-36v2= Short Form-36Version 2; SAE = Serious Adverse Event
3.STUDY DESIGN
This is a randomized, double-blind, placebo-controlled, parallel-group, Phase3 study to 
evaluate the efficacy and safety of PF-04965842 monotherapy in subjects aged 12years and 
older with moderate to severe AD and a body weight 40kg.  The treatment duration is 
12weeks.  Subjects will be screened within 28days prior to the first dose of investigational 
product to confirm that they meet the subject selection criteria for the study.  A total of 
approximately 375subjects will be enrolled from approximately 85sites located globally. 
Adolescent subjects below the age of 18 years old (or country-specific age of majority) will 
only be enrolled in this study if instructed by the sponsor and approved by the country or 
regulatory/health authority.  If these approvals have not been granted, only subjects aged 
18years (or country-specific age of majority) and older will be enrolled.A study design 
schematic is presented in Figure 1.
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Figure 1.
Study Design Schematic
Qualified subjects completing the 12-week treatment period of the study will have the option 
to enter a long-term extension (LTE) study B7451015.  Subjects discontinuing early from 
treatment, or who are otherwise ineligible for the LTE study will undergo a 4 week follow-up 
period in B7451013.
Subjects who have chronic moderate to severe AD as defined per the inclusion criteria will 
be randomized to receive 200 mg or 100 mg PF-04965842 once daily (QD), or matching 
placebo. Investigators, subjects, and the sponsor study team will be blinded as to treatment 
group.
After providing informed consent, subjects will be assessed for study eligibility at the 
screening visit.  For subjects younger than 18 years old (or country-specific age of majority), 
their parent(s)/legal guardian will provide supplementary or sole written consent and minor 
children will provide assent, according to local regulations and rules regarding ability to give 
assent and consent.  Subjects will undergo screening within 28 days prior to randomization.  
During the screening period, treatments for AD will be washed out, as applicable, according 
to eligibility requirements.  Subjects may be re-screened once if they fail the screening 
evaluation for reasons related to incidental transitory conditions, unless the reason for the 
screen failure the disease severity inclusion criteria. 
Subjects who continue to meet eligibility criteria at baseline will undergo Day 1/baseline 
assessments and be randomized in a 2:2:1 ratio to receive 200 mg PF-04965842 (N=150) or 
100 mg PF-04965842 QD (N=150) or matching placebo (N=75) from Day 1. 

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Randomization will be stratified by baseline disease severity (moderate [IGA = 3] vs. severe 
[IGA = 4] AD), and, age <18 and 18.  Eligible subjects must have a documented history of 
inadequate response or intolerance to treatment with topical AD medications or have required 
systemic therapies for control of their disease.
4. SUBJECT ELIGIBILITY CRITERIA
This study can fulfill its objectives only if appropriate subjects are enrolled.  The following 
eligibility criteria are designed to select subjects for whom participation in the study is 
considered appropriate.  All relevant medical and nonmedical conditions should be taken into 
consideration when deciding whether a particular subject is suitable for this protocol. 
Subject eligibility should be reviewed and documented by an appropriate member of the 
investigator’s study team before subjects are included in the study. 
4.1. Inclusion Criteria
Subjects must meet all of the following inclusion criteria to be eligible for enrollment into the 
study:
1. Evidence of a personally signed and dated informed consent document indicating that 
the subject or their parent(s)/legal guardian, if applicable, have been informed of all 
pertinent aspects of the study. 
2. Male or female subjects of 12 years of age or older, at the time of informed consent 
and body weight 40 kg.  Adolescent subjects below the age of 18 years old (or 
country-specific age of majority) will only be enrolled in this study if instructed by 
the sponsor and approved by the country or regulatory/health authority.  If these 
approvals have not been granted, only subjects aged 18 years (or country-specific age 
of majority) and older will be enrolled.
3. Meet all the following atopic dermatitis criteria:

Clinical diagnosis of chronic atopic dermatitis (also known as atopic eczema) for 
at least 1 year prior to Day 1 and has confirmed atopic dermatitis at the screening 
and baseline visits according to Hanafin and Rajka criteria for AD16 (see 
Appendix 2).

Documented recent history (within 6 months before the screening visit) of 
inadequate response to treatment with topical medications for at least 4 weeks, or 
for whom topical treatments are otherwise medically inadvisable (eg, because of 
important side effects or safety risks), or who have required systemic therapies for 
control of their disease.

Moderate to severe AD (affected BSA ≥10%, IGA ≥3, EASI ≥16, and Pruritus 
NRS severity score ≥4 on the day of the baseline visit).

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4. Willing and able to comply with scheduled visits, treatment plan, laboratory tests and 
other study procedures.
5. Female subjects who are of child-bearing potential (which includes all adolescents
aged 12 years and older, regardless of whether they have experienced menarche) must 
not be intending to become pregnant, currently pregnant, or lactating.  The following 
conditions apply:
a.
Female subjects of childbearing potential must have a confirmed negative 
pregnancy test prior to randomization;
b. Female subjects of childbearing potential must agree to use a highly effective 
method of contraception (as per Section 4.4.1) for the duration of the active 
treatment period and for at least 28 days after the last dose of investigational 
product.
NOTE: Sexual abstinence, defined as completely and persistently refraining from all 
heterosexual intercourse (including during the entire period of risk associated with 
study treatments) may obviate the need for contraception ONLY if this is the 
preferred and usual lifestyle of the subject. 
6. Female subjects of non-childbearing potential must meet at least 1 of the following 
criteria: 

Have undergone a documented hysterectomy and/or bilateral oophorectomy;

Have medically confirmed ovarian failure; or

Achieved postmenopausal status, defined as follows: cessation of regular menses 
for at least 12 consecutive months with no alternative pathological or 
physiological cause and have a serum follicle-stimulating hormone (FSH) level 
confirming the postmenopausal state.
All other female subjects (including female subjects with tubal ligations) are 
considered to be of childbearing potential.
7. Must agree to avoid prolonged exposure to the sun and not to use tanning booths, sun 
lamps or other ultraviolet light sources during the study.
8. If receiving concomitant medications for any reason other than AD, must be on a 
stable regimen, which is defined as not starting a new drug or changing dosage within 
7 days or 5 half-lives (whichever is longer) prior to Day 1 and through the duration of 
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4.2. Exclusion Criteria
Subjects with any of the following characteristics/conditions will not be included in the 
study:
1. Other acute or chronic medical or psychiatric condition including recent (within the 
past year) or active suicidal ideation or behavior or laboratory abnormality that may 
increase the risk associated with study participation or investigational product 
administration or may interfere with the interpretation of study results and, in the 
judgment of the investigator, would make the subject inappropriate for entry into this 
study.
2. Any psychiatric condition including recent or active suicidal ideation or behavior that 
meets any of the following criteria: 

Suicidal ideation associated with actual intent and a method or plan in the past 
year: “Yes” answers on items 4 or 5 of the Columbia suicide severity rating scale 
(C-SSRS) (Appendix 17);

Previous history of suicidal behaviors in the past 5 years: “Yes” answer (for 
events that occurred in the past 5 years) to any of the suicidal behavior items of 
the C-SSRS;

Any lifetime history of serious or recurrent suicidal behavior;

Suicidal behaviors questionnaire – revised (SBQ-R) total score 8 (Appendix 18);

Clinically significant depression: patient health questionnaire – 8 items (PHQ-8) 
total score 15 (Appendix 19);

The presence of any current major psychiatric disorder that is not explicitly 
permitted in the inclusion/exclusion criteria;

In the opinion of the investigator or Pfizer (or designee) exclusion is required.
3. A current or past medical history of conditions associated with thrombocytopenia, 
coagulopathy or platelet dysfunction.
4. Receiving anti-coagulants or medications known to cause thrombocytopenia, (unless 
considered safe to stop and washout for the duration of the study).
5. Currently have active forms of other inflammatory skin diseases, ie, not AD or have 
evidence of skin conditions (eg, psoriasis, seborrheic dermatitis, Lupus) at the time of 
Day 1 that would interfere with evaluation of atopic dermatitis or response to 
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6. Vaccinated or exposed to a live or attenuated vaccine within the 6 weeks prior to the 
first dose of investigational product, or is expected to be vaccinated or to have 
household exposure to these vaccines during treatment or during the 6 weeks 
following discontinuation of investigational product.
7. Adolescent subjects 12 to <18 years old without documented evidence of having 
received at least one dose of the varicella vaccine in countries where the vaccine is 
approved and standard of care or those who do not have evidence of prior exposure to 
varicella zoster virus (VZV) based on serological testing (ie, varicella zoster virus 
immunoglobulin G antibody [VZV IgG Ab]) at screening.
8. Subjects who have received prior treatment with any JAK inhibitors.
9. Participation in other studies involving investigational drug(s) within 8 weeks or 
within 5 half-lives (if known) whichever is longer, prior to study entry and/or during 
study participation.
Note: Any investigational or experimental therapy taken or procedure performed for 
AD, psoriasis, psoriatic arthritis or rheumatoid arthritis in the previous 1 year should 
be discussed with the Pfizer Medical Monitor (or designee).  Subjects cannot 
participate in studies of other investigational or experimental therapies or procedures 
at any time during their participation in this study.
10. Have received any of the following treatment regimens specified in the timeframes 
outlined below:
Within 1 year of first dose of investigational product:

Prior treatment with non B cell-specific lymphocyte depleting agents/therapies 
(eg, alemtuzumab [CAMPATH], alkylating agents [eg, cyclophosphamide or 
chlorambucil], total lymphoid irradiation, etc.).  Subjects who have received 
rituximab or other selective B lymphocyte depleting agents (including 
experimental agents) are eligible if they have not received such therapy for at 
least 1 year prior to study baseline and have normal cluster of differentiation (CD)
19/20+ counts by fluorescence-activated cell sorting (FACS) analysis.
Within 12 weeks of first dose of investigational product:

Other biologics: within 12 weeks of first dose of investigational product or 
5 half-lives (if known), whichever is longer.
Within 6 weeks of first dose of investigational product:

Use of dupilumab.

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Within 4 weeks of first dose of investigational product: 

Use of oral immunosuppressive drugs (eg, cyclosporine A [CsA], azathioprine, 
methotrexate, systemic corticosteroids, mycophenolate-mofetil, IFN-) within 
4 weeks of first dose of investigational product or within 5 half-lives (if known), 
whichever is longer; 

Phototherapy narrowband UVB (NB-UVB) or broad band phototherapy;

Regular use (more than 2 visits per week) of a tanning booth/parlor;

Herbal medications with unknown properties or known beneficial effects for AD.
Within 1 week of first dose of investigational product:

Anti-platelet drugs. 
Note: low dose acetyl salicylic acid (100 mg QD) is permitted, for the purpose of 
cardiovascular prophylaxis, at the discretion of the investigator.
Within 72 hours of first dose of investigational product:

Topical treatments that could affect atopic dermatitis (eg, corticosteroids, 
calcineurin inhibitors, tars, antibiotic creams, topical antihistamines).
Note: Corticosteroid inhalers and intranasal sprays are allowed for stable asthma 
patients.
11. Have a history of any lymphoproliferative disorder such as Epstein Barr Virus (EBV) 
related lymphoproliferative disorder, history of lymphoma, leukemia, or signs or 
symptoms suggestive of current lymphatic or lymphoid disease.
12. Infection History:
a.
Have a history of systemic infection requiring hospitalization, parenteral 
antimicrobial therapy, or as otherwise judged clinically significant by the 
investigator within 6 months prior to Day 1.
b. Have active chronic or acute skin infection requiring treatment with systemic 
antibiotics, antivirals, antiparasitics, antiprotozoals, or antifungals within 2 weeks 
prior to Day 1, or superficial skin infections within 1 week prior to Day 1.
c.
A subject known to be infected with Human Immunodeficiency Virus (HIV), 
Hepatitis B, or Hepatitis C (Section 7.6.2).
For China and Republic of Korea only: Subjects who are HBsAg negative, 
HBcAb positive, and HBsAb positive at Screening will have reflex testing for 
Hepatitis B virus deoxyribonucleic acid (HBV DNA). Subjects who have HBV 
DNA above the lower limit of quantification (LLQ) will be excluded.  Subjects 
who are HBV DNA negative or below LLQ may be randomized but will have 
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For Japan only: Subjects with negative results for HBsAg, HBcAb and HBsAb 
may be eligible. Subjects who are HBsAg negative, HBcAb negative and HBsAb 
positive and provide documentation of prior HBV vaccination may be eligible and 
will not require HBV DNA monitoring during the study. Subjects who are 
HBsAg negative, HBcAb negative and HBsAb positive without documentation of 
prior HBV vaccination AND subjects who are HBsAg negative, HBcAb positive, 
and HBsAb positive at screening will have reflex testing for HBV DNA.  Subjects 
who are HBV DNA negative or below LLQ may be randomized but will have 
repeat HBV DNA testing at Week 12 (or early termination).
d. Have a history (single episode) of disseminated herpes zoster or disseminated 
herpes simplex, or a recurrent (more than one episode of) localized, dermatomal 
herpes zoster.
13. Have a history of alcohol or substance abuse within 6 months prior to Day 1 that in 
the opinion of the investigator will preclude participation in the study.
14. A Screening 12-lead ECG that demonstrates clinically significant abnormalities 
requiring treatment (eg, acute myocardial infarction, serious tachy- or 
brady-arrhythmias) or that are indicative of serious underlying heart disease 
(eg, cardiomyopathy, major congenital heart disease, low voltage in all leads, 
Wolff-Parkinson-White syndrome) or criteria associated with Q wave interval 
(QT)/ Fridericia-corrected Q wave interval (QTcF) abnormalities including:

A marked prolongation of QTcF interval (>450 milliseconds [ms]) on the 
screening ECG;

A history of additional risk factors for Torsade de Pointes (TdP) (eg, heart failure, 
hypokalemia, family history of Long QT Syndrome);

Use of concomitant medications that prolong the QT/QTcF interval.
15. Have a known immunodeficiency disorder or a first-degree relative with a hereditary 
immunodeficiency.
16. Have any malignancies or have a history of malignancies with the exception of 
adequately treated or excised non-metastatic basal cell or squamous cell cancer of the 
skin, or cervical carcinoma in situ.
17. Require treatment with prohibited concomitant medication(s) (Section 5.8.2 and 
Appendix 3) or have received a prohibited concomitant medication within the 
specified time frame prior to the first dose of study medication.
18. Have evidence of active or latent or inadequately treated infection with 
Mycobacterium tuberculosis (TB) as defined by the following:

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
A positive QuantiFERON-TB Gold (QFT-G) In-Tube test or positive 
Mantoux/Purified Protein Derivative (PPD) tuberculin skin test (if appropriate per 
Section 7.3.4) performed at or within the 12 weeks prior to Day 1 is exclusionary; 
a negative test is required for eligibility. It is recommended that subjects with a 
history of Bacille Calmette Guérin (BCG) vaccination be tested with the QFT-G 
test since the Mantoux/PPD tuberculin skin test may be positive due to 
vaccination.  See Section 7.3.4 for requirements for Mantoux/PPD tuberculin skin 
testing.  A QFT-G or Mantoux/PPD tuberculin skin test is not required if the 
subject has previously received a documented adequate course of therapy for 
either latent or active TB infection.
For Japan only: While QuantiFERONis the preferred testing method, the 
T-SPOT. TB test is also acceptable as the screening TB test. Borderline results 
from the T-SPOT.TB test should be considered exclusionary. If the test results
are indeterminate, the test should be repeated.  If the result of the repeat test is 
indeterminate, subjects may be screened using the Mantoux/PPD skin test with 
Pfizer Medical Monitor approval.  See Section 7.3.4.

A history of either untreated or inadequately treated latent or active TB infection;

If a subject has previously received an adequate course of therapy for either latent 
(9 months of isoniazid in a locale where rates of primary multi-drug TB resistance 
are <5% or an acceptable alternative regimen) or active (acceptable multi-drug 
regimen) TB infection, neither a QFT-G test, T-SPOT.TB test (Japan only) nor a 
Mantoux/PPD tuberculin skin test is needed, but a chest radiograph(s) is required 
for adults, and recommended for adolescents per local standard/guidelines, if not 
performed within 12 weeks prior to Day 1.  To be considered eligible for the 
study, the radiograph(s) must be negative for active tuberculosis infection as 
determined by a qualified radiologist.  Documentation of adequate treatment for 
TB and negative chest radiograph(s) results must be obtained prior to Day 1.  If 
the current incidence rates of multi-drug resistant TB infection in the locale are 
unavailable, an adequate treatment regimen should be defined as the regimen 
recommended by the health ministry or expert panel in the locale;

A subject who is currently being treated for active TB infection is to be excluded.
19. ANY of the following abnormalities in clinical laboratory tests at screening, as 
assessed by the study-specific laboratory and confirmed by a single repeat, if deemed 
necessary:

Absolute neutrophil count of <1.2 x 109/L (<1200/mm3);

Hemoglobin <10.0 g/dL or hematocrit <30%;

Platelet count of <150 x 109/L (<150,000/mm3);

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
Absolute lymphocyte count of <0.50 x 109 /L (<500/mm3);

For the Voluntary Harmonisation Procedure (VHP) participating member 
states (Czech Republic, Germany, Hungary, Latvia, Poland, United Kingdom) 
only, the following absolute lymphocyte count thresholds apply:

<0.95 x 109 /L (<950/mm3) for subjects 12-17 years of age;

<0.91 x 109 /L (<910/mm3) for subjects 18-59 years of age;

<0.80 x 109 /L (<800/mm3) for subjects 60 years of age.

Estimated Creatinine Clearance <40 mL/min based on the age appropriate
calculation, or serum creatinine >1.5 times the upper limit of normal (ULN);

Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) values 
>2 times the ULN;

Total bilirubin 1.5 times the ULN; subjects with a history of Gilbert’s syndrome 
may have a direct bilirubin measured and would be eligible for this study 
provided the direct bilirubin is ULN.
20. In the opinion of the investigator or sponsor, have any uncontrolled clinically 
significant laboratory abnormality that would affect interpretation of study data or the 
subject’s participation in the study.
21. Have undergone significant trauma or major surgery within 1 month of the first dose 
of investigational product.
22. Investigator site staff members directly involved in the conduct of the study and their 
family members, site staff members otherwise supervised by the investigator, or 
subjects who are Pfizer employees, including their family members, directly involved 
in the conduct of the study. 
4.3. Randomization Criteria 
Subjects will be randomized into the study provided they or their parent(s)/legal guardian, if 
applicable, have signed an informed consent document to participate in the study, have 
undergone all screening procedures, and have met all inclusion and none of the exclusion 
criteria for participation in the study at Day 1.  A computer-generated randomization 
schedule will be used to assign subjects to the treatment groups using an Interactive 
Response Technology (IRT).
4.4. Lifestyle Requirements 
In order to participate in the study, subjects must be aware of the following lifestyle
guidelines and restrictions that apply during and after the treatment period.

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
On study visit days (Day 1, Weeks 4, 12 and End of Study [EOS]), subjects must 
comply with fasting requirement for at least 8 hours prior to the visit.  Water and 
permitted non-study medications are allowed (see Section 5.8.1).

On study visit days, subjects must not smoke or ingest caffeine during the 30 minutes 
prior to blood pressure and heart rate measurements.

On study visit days, subjects must not take the dose of investigational product until 
instructed to do so by the investigator or designated study site staff.

On study visit days, showering or bathing is permitted prior to attending the study 
visit, but subjects must not moisturize or apply emollient.  Non-medicated emollient 
is allowed after the visit.  Discontinue and avoid using certain medications and 
treatments (Section 4.2, Section 5.8.2, and Appendix 3).

Agree to use one highly effective method of contraception (as specified in 
Section 4.4.1, as applicable.
4.4.1. Contraception
All female subjects who are of childbearing potential including adolescents aged 12 years 
and older, regardless of whether they have experienced menarche, who are, in the opinion of 
the investigator, sexually active and at risk for pregnancy with their partner(s) must agree to 
use a highly effective method of contraception consistently and correctly for the duration of 
the active treatment period and for at least 28 days after the last dose of investigational 
product.  The investigator or his or her designee, in consultation with the subject, will 
confirm that the subject has selected an appropriate method of contraception for the 
individual subject and her partner from the permitted list of contraception methods (see 
below) and will confirm that the subject has been instructed in its consistent and correct use.  
At time points indicated in the Schedule of Activities, the investigator or designee will 
inform the subject of the need to use highly effective contraception consistently and correctly 
and document the conversation and the subject’s affirmation in the subject’s chart (subjects 
needs to affirm their consistent and correct use of at least 1 of the selected methods of 
contraception).  In addition, the investigator or designee will instruct the subject to call 
immediately if the selected contraception method is discontinued or if pregnancy is known or
suspected in the subject or the partner. 
Highly effective methods of contraception are those that, alone or in combination, result in a 
failure rate of less than 1% per year when used consistently and correctly (ie, perfect use) and 
include the following:
1. Established use of hormonal methods of contraception associated with inhibition of 
ovulation (eg, oral, inserted, injected, implanted, transdermal) provided the subject 
plans to remain on the same treatment throughout the entire study and has been using 
that hormonal contraceptive for an adequate period of time to ensure effectiveness.
2. Correctly placed copper-containing intrauterine device (IUD). 

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3. Male condom or female condom used WITH a separate spermicide product (ie, foam, 
gel, film, cream, or suppository).  For countries where spermicide is not available or 
condom plus spermicide is not accepted as highly effective contraception, this option 
is not appropriate.
4. Male sterilization with absence of sperm in the post-vasectomy ejaculate.
5. Bilateral tubal ligation/bilateral salpingectomy or bilateral tubal occlusive procedure 
(provided that occlusion has been confirmed in accordance with the device’s label).
NOTE: Sexual abstinence, defined as completely and persistently refraining from all 
heterosexual intercourse (including during the entire period of risk associated with the study 
treatments) may obviate the need for contraception ONLY if this is the preferred and usual 
lifestyle of the subject.
The contraception check is an opportunity to confirm that contraception, if assigned, is used 
consistently and correctly.  It also facilitates continual reassessment of child bearing potential 
in women.  This allows for implementing necessary changes to contraception; for example, 
investigators may need to ensure alternative contraceptive methods if new concomitant 
disease contraindicates a selected method of contraception, or if a subject is demonstrably no 
longer of child bearing status (as per protocol) then they will no longer require contraception.  
Continual reassessment of contraceptive needs is imperative.
For countries in the EU:
Highly effective methods of contraception are those that, alone or in combination, result in a 
failure rate of less than 1% per year when used consistently and correctly (ie, perfect use) and 
include the following:
1. Established use of hormonal methods of contraception associated with inhibition of 
ovulation (eg, oral, inserted, injected, implanted, transdermal) provided the subject 
plans to remain on the same treatment throughout the entire study and has been using 
that hormonal contraceptive for an adequate period of time to ensure effectiveness.
2. Correctly placed copper-containing intrauterine device (IUD).
3. Male sterilization with absence of sperm in the post-vasectomy ejaculate.
4. Bilateral tubal ligation/bilateral salpingectomy or bilateral tubal occlusive procedure 
(provided that occlusion has been confirmed in accordance with the device’s label).
NOTE: Sexual abstinence, defined as completely and persistently refraining from all 
heterosexual intercourse (including during the entire period of risk associated with the study 
treatments) may obviate the need for contraception ONLY if this is the preferred and usual 
lifestyle of the subject.

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4.4.2. Vaccine and Exposure to Infections Guidelines
4.4.2.1. Subject Specific Recommendations
It is recommended that all subjects should be up-to-date with respect to standard of care 
vaccinations (as defined by their country health ministry) or AD guidelines.  Vaccination of 
subjects with live components is prohibited within the 6 weeks prior to first dose of 
investigational product.  Adolescent subjects without documented evidence of having 
received at least one dose of the varicella vaccine or those who are without evidence of 
previous varicella zoster exposure as confirmed by VZV IgG Ab serological testing are 
excluded. 
4.4.2.2. Guidance Regarding Household Contact Vaccine-Related Exposure
Current routine household contact with children and others who have been vaccinated with 
live vaccine components may pose a risk during treatment and for 6 weeks following 
completion of the study.  Some of these vaccines include varicella (“chickenpox”) vaccine, 
oral polio vaccine, and the inhaled flu vaccine.  Following vaccination with live component 
vaccines, the virus may be shed in bodily fluids, including stool, and there is a potential risk 
that the virus may be transmitted.  General guidelines for immunosuppressed subjects 
suggest that exposure (through routine contact) should be avoided following vaccination (of 
others) with these vaccines for the stated time period:
a.
Varicella or attenuated typhoid fever vaccination for 4 weeks following vaccination.
b. Oral polio vaccination for 6 weeks following vaccination.
c.
Attenuated rotavirus vaccine for 10 days following vaccination.
d. FluMist(inhaled flu vaccine) for 1 week following vaccination.
Subjects should avoid exposure to vaccinated or infected persons and contact the investigator 
promptly should they develop signs or symptoms of infections.
4.4.3. Surgery
During the study, no elective surgery should occur without first consulting with the Pfizer 
Medical Monitor or designee.  Preferably, elective surgery should occur before the study or 
be delayed until participation in the study is completed.
The Pfizer Medical Monitor or designee should be notified if a subject requires surgery 
(including dental surgery) during the study to determine whether the subject should 
discontinue from the study and/or discontinue investigational product prior to the surgical 
procedure.  In general, planned surgical procedures should not be performed unless the 
investigational product has been discontinued for at least 28 days (unless otherwise advised 
by the Pfizer Medical Monitor or designee).  The Pfizer Medical Monitor or designee should 
be notified as soon as possible if a subject undergoes a surgical procedure without first 
informing the study staff.

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4.5. Sponsor’s Qualified Medical Personnel
The contact information for the sponsor's appropriately qualified medical personnel for the 
study is documented in the study contact list located in the coordinator’s manual and in the 
study portal.
To facilitate access to appropriately qualified medical personnel on study-related medical 
questions or problems, subjects are provided with a contact card.  The contact card contains, 
at a minimum, protocol and investigational product identifiers, subject study numbers, 
contact information for the investigator site, and contact details for a contact center in the 
event that the investigator site staff cannot be reached to provide advice on a medical 
question or problem originating from another healthcare professional not involved in the 
subject’s participation in the study.  The contact number can also be used by investigator 
staff if they are seeking advice on medical questions or problems; however, it should be used 
only in the event that the established communication pathways between the investigator site 
and the study team are not available.  It is therefore intended to augment, but not replace, the 
established communication pathways between the investigator site and the study team for 
advice on medical questions or problems that may arise during the study.  The contact 
number is not intended for use by the subject directly, and if a subject or their parent(s)/legal 
guardian calls that number, he or she will be directed back to the investigator site.
5. STUDY TREATMENTS 
For this study, the investigational products are PF-04965842 and placebo.  PF-04965842 will 
be administered orally at doses of 100 mg or 200 mg given QD for 12 weeks based on 
treatment assignment.  In addition, one treatment group will be assigned to receive 
PF-04965842-matching placebo. 
For the purposes of this study, and per International Conference on Harmonisation (ICH) 
guidelines, investigational product is defined as a pharmaceutical form of an active 
ingredient or placebo being tested or used as a reference/comparator in a clinical trial, 
including a product with a marketing authorization when used or assembled (formulated or 
packaged) in a way different from the approved form, or when used for an unapproved 
indication, or when used to gain further information about an approved use (ICH E6 1.33).  
5.1. Allocation to Treatment
Allocation of subjects to treatment groups will proceed through the use of an Interactive 
Response Technology (IRT) system.  The site personnel (study coordinator or specified 
designee) will be required to enter or select information including but not limited to the 
user’s identification (ID) and password, protocol number, the subject number and the date of 
birth of the subject.  The site personnel will then be provided with a treatment assignment 
and dispensable unit (DU) or container number when investigational product is being 
supplied via the IRT.  The IRT system will provide a confirmation report containing the 
subject number and DU or container number assigned.  The confirmation report must be 
stored in the site’s files. 

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There is a 24 hour a day, 365 days a year IRT help desk available for any questions or issues.  
The study specific IRT reference manual will provide the contact information and further 
details on the use of the IRT. 
Note: The IRT is the source of the subject number.  The IRT system will provide the subject 
number at the end of the first IRT subject transaction.
5.2. Breaking the Blind
Investigators, subjects and the sponsor study team will be blinded as to treatment group.  The 
study will be subject and investigator blinded.  At all times, treatment and randomization 
information will be kept confidential and will not be released to the investigator, the study 
staff, or the sponsor’s study team until following the conclusion of the study, with the 
exception described in this section. 
At the initiation of the study, the study site will be instructed on procedures for breaking the 
blind.  Blinding codes should only be broken in emergency situations for reasons of subject 
safety.  The method will be an electronic process.  When the blind for a subject has been 
broken, the reason must be fully documented and entered on the Case Report Form (CRF).  
Whenever possible, the investigator should contact Pfizer before breaking the blind.  If the 
blind is broken, the investigator should promptly inform the Pfizer Clinician or Medical 
Monitor.  The subject for whom the blind has been broken will be discontinued from the 
study and undergo the early termination (ET) procedures.
5.3. Subject Compliance
For self-administration of the investigational product at home, compliance will be captured 
and completed by the subject.  Subjects will be issued an electronic dosing diary (eDiary) and 
will be educated to record the time of their daily dosing, once they have taken the 
investigational product. 
When investigational product is administered at the research facility, it will be administered 
under the supervision of study personnel.
Compliance with the dosing of investigational product will be monitored and verified by 
delegated site personnel through a combination of the accounting of unused investigational 
product returned by the subject at the study visits, review of the dosing diary, and discussion 
with the subject which will be documented in the source documents.
Investigational product should be taken in the morning.  Subjects should be instructed that if 
a dose is inadvertently missed then it should be taken as soon as remembered, but not within 
12 hours of the next scheduled dose. 
The following compliance cases will be considered medication errors and will be discussed 
with the sponsor for possible withdrawal from the study:

Subjects interrupting investigational product for more than 4 consecutive days or for a 
total of more than 7 days between visits;  

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
Subjects administering >8 tablets in one day or administering 4 tablets/day for 
4 consecutive days;  

Subjects who have an overall compliance of <80% or >120% between visits.
Any deviation from protocol specified dosing should be recorded as a protocol deviation and 
the investigator or designee is to counsel the subject and parent(s)/legal guardian (if 
applicable) and ensure steps are taken to improve compliance. In addition, if the compliance 
deviation reaches the thresholds defined above it should also be recorded as a medication 
error (see Section 8.4.4).
5.4. Investigational Product Supplies
5.4.1. Dosage Form(s) and Packaging
Blinded PF-04965842 and its matched placebo will be provided as 100 mg tablets for oral 
administration.  The 100 mg tablets and their matching placebos will be supplied in separate 
bottles and labeled according to local regulatory requirements.
When received by the pharmacy, PF-04965842 and matching placebo will be in containers 
that will sufficiently blind all site staff to content within the bottles (ie, active versus 
placebo).
5.4.2. Preparation and Dispensing
The investigational product should be dispensed using a drug management system at each 
dispensing visit.  A qualified staff member will dispense the investigational product via 
unique container numbers in bottles provided, in quantities appropriate for the study visit 
schedule.  The subject/caregiver should be instructed to maintain the product in the bottles 
provided throughout the course of dosing and return the bottles to the site at the next study 
visit.
5.5. Administration
Subjects will be dispensed two (2) bottles at each dispensing visit and given clear dosing 
instructions to take one tablet from each bottle, once daily, preferably in the morning, at 
approximately the same time of day.  Subjects should take the investigational product orally 
once a day for 12 weeks, however, for study visit days, subjects are to be instructed to refrain 
from dosing at home, and are to take the dose in the clinic on site visit days.

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Table 2.
Investigational Product Administration
Treatment Assignment
QD Dosing*
100 mg QD
Bottle A 100 mg - 1 tablet 
Bottle B Placebo - 1 tablet
200 mg QD
Bottle A 100 mg - 1 tablet
Bottle B 100 mg - 1 tablet
Placebo
Bottle A Placebo - 1 tablet 
Bottle B Placebo - 1 tablet
* Bottle A and B designations are used for example purposes only.
Subjects will swallow the investigational product whole, and will not manipulate or chew the 
medication prior to swallowing.  Investigational product may be taken with or without food, 
other than on study visit days where fasting is required. 
A guidance document with detailed dosing instructions will also be provided to subjects to 
support at-home dosing.
5.6. Investigational Product Storage 
The investigator, or an approved representative, eg, pharmacist, will ensure that all 
investigational products are stored in a secured area with controlled access under required 
storage conditions and in accordance with applicable regulatory requirements. 
Investigational product should be stored in their original container and in accordance with the 
labels.  See the Investigational Product Manual (IP Manual) for storage conditions of the 
product.
Any storage conditions stated in the SRSD will be superseded by the storage conditions 
stated on the product label.
Site systems must be capable of measuring and documenting (for example, via a log), at a 
minimum, daily minimum and maximum temperatures for all site storage locations (as 
applicable, including frozen, refrigerated, and/or room-temperature products).  This should 
be captured from the time of investigational product receipt throughout the study.  Even for 
continuous-monitoring systems, a log or site procedure that ensures active evaluation for 
excursions should be available.  The intent is to ensure that the minimum and maximum 
temperature is checked each business day to confirm that no excursion occurred since the last 
evaluation and to provide the site with the capability to store or view the minimum/maximum 
temperature for all non-working days upon return to normal operations.  The operation of the 
temperature monitoring device and storage unit (for example, refrigerator), as applicable, 
should be regularly inspected to ensure they are maintained in working order. 
Any excursions from the product label storage conditions should be reported to Pfizer upon 
discovery.  The site should actively pursue options for returning the product to the storage 
conditions described in the labeling, as soon as possible.  Deviations from the storage 
requirements, including any actions taken, must be documented and reported to Pfizer.

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Once an excursion is identified, the investigational product must be quarantined and not used 
until Pfizer provides documentation of permission to use the investigational product.  It will 
not be considered a protocol deviation if Pfizer approves the use of the investigational 
product after the temperature excursion.  Use of the investigational product prior to Pfizer 
approval will be considered a protocol deviation.  Specific details regarding information the 
site should report for each excursion will be provided to the site in the IP Manual. 
Receipt of materials, door opening and closing, and other routine handling operations where 
the products are briefly out of the temperature range described in the labeling are not 
considered excursions.
Site staff will instruct subjects on the proper storage requirements for take home 
investigational products. 
5.7. Investigational Product Accountability 
The investigator site must maintain adequate records documenting the receipt, use, loss, or 
other disposition of the investigational product supplies.  All investigational products will be 
accounted for using a drug accountability form/record.  To ensure adequate records, all drug 
supplies will be accounted for in the drug accountability inventory forms as instructed by 
Pfizer and will be monitored by the accounting of unused investigational product returned by 
the subjects.  At the end of the clinical trial, all drug supplies unallocated or unused by the 
subjects must be returned to Pfizer or its appointed agent, or destroyed in an approved 
manner unless otherwise authorized by Pfizer.  In either case, the forms must identify the 
investigational product, including batch or code numbers, and account for its disposition on a 
subject-by-subject basis, including specific dates and quantities. 
All bottles of investigational product must be brought back to the site at every visit for 
inspection by the site staff and all bottles/unused investigational product must be returned to 
the investigator by the subject at the relevant visit(s).
5.7.1. Destruction of Investigational Product Supplies 
The sponsor or designee will provide guidance on the destruction of unused investigational 
product (eg, at the site).  If destruction is authorized to take place at the investigator site, the 
investigator must ensure that the materials are destroyed in compliance with applicable 
environmental regulations, institutional policy, and any special instructions provided by 
Pfizer, and all destruction must be adequately documented.
5.8. Concomitant Treatment(s)
Subjects will abstain from all concomitant medications as described in Section 4.2 and 
Appendix 3 of the protocol.  Medications that are taken in the Screening/Washout period 
(after informed consent is obtained and before the first dose of investigational product) will 
be documented as prior medications.  Medications taken after the first dose of investigational 
product has been administered will be documented as concomitant medications.  All 
concomitant medications taken during the study must be recorded in study records with 
indication (if atopic dermatitis), reference to any associated adverse event, dose, and start and 

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stop dates of administration.  Subjects will be queried about concomitant medication 
(including topical medications and treatments, over-the-counter and prescription medications 
and treatments, and vaccinations) at each study visit.  Any new concomitant medications or 
dose changes to current concomitant medications should be evaluated for potential new or 
worsening adverse events.
5.8.1. Permitted Concomitant Medications
The following concomitant AD therapies are permitted during the study:

Oral antihistamines; 

Topical non-medicated emollient. 
The following concomitant medications are permitted during the study:

Corticosteroid inhalers and intranasal sprays are allowed for stable asthma patients;

Ophthalmic corticosteroids are allowed for patients receiving a stable dose to treat 
rhinoconjuntivitis;

Low dose acetyl salicylic acid (<100 mg QD) is permitted, for the purpose of 
cardiovascular prophylaxis, at the discretion of the investigator;

Acetaminophen/paracetamol may be used intermittently (not to exceed 1 g/day); 

Vitamin and mineral supplements of standard potency are allowed in amounts not 
known to be associated with adverse effects (such as hyper-vitaminosis).
For the purposes of this protocol, dietary supplements are defined as vitamins, minerals, and 
purified food substances.  Vitamins, minerals and purified food substances are allowed in 
amounts not known to be associated with adverse effects (such as hyper-vitaminosis).
Unless a prohibited medication or treatment, subjects may be administered any other 
medications necessary for the treatment of concomitant medical disorders as deemed 
necessary by the treating physician.  Following Day 1, addition of concomitant medications 
or any change in the dosage should be limited to those considered medically essential.
A subject who is receiving a permitted concomitant medication for any reason must be on a 
locally-approved medication and dose, and this must be documented in the CRF.  Subjects 
are not allowed any other investigational drugs or treatments during the study. 
Subjects should refrain from starting new or changing doses of permitted prescription or 
non-prescription drugs, vitamins, and dietary supplements within 7 days or 5 half-lives 
(whichever is longer) prior to Day 1 and prior to study visits throughout the study, unless 
otherwise noted below. 

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Subjects should report any changes to permitted medications during the study to the 
investigator as soon as they occur.  Medication changes must be documented in the subject’s 
record and CRF.
5.8.2. Prohibited Medications and Treatments
Subjects are required to discontinue and avoid using certain medications and treatments (see 
Section 4.2, Inclusion Criteria and Exclusion Criteria, and Appendix 3).  Subjects should be 
instructed at each visit to contact the study site investigator promptly if there are any 
intended changes or additions to concomitant medications. 
All medications and treatments that could affect atopic dermatitis must be discontinued 
except oral antihistamines.  Due to the potential to affect atopic dermatitis with ultraviolet 
light exposure, subjects must also avoid prolonged exposure to the sun and not to use tanning 
booths, sun lamps or other ultraviolet light sources during the study. 
Subjects who received prior treatment with JAK inhibitors are to be excluded from the study. 
Herbal medications with unknown properties or known beneficial effects for AD must be 
discontinued at least 4 weeks before the first dose of investigational product. 
Restrictions on certain vaccinations are described in Section 4.4.2.
The Pfizer study team is to be notified of any prohibited medications taken during the study.  
After consulting with the Medical Monitor, the investigator will make a judgement on the 
ongoing eligibility of any subject with prohibited medication use during the study. 
6. STUDY PROCEDURES 
Refer to the Schedule of Activities for a detailed list of study procedures as they should be 
conducted at each respective visit. 
Due to possible need for PPD testing and chest radiograph, screening procedures may be 
performed over more than 1 visit in the 28 days prior to the Day 1 visit. 
Visit windows are based on Day 1 visit.  To assure consistency and reduce variability, all 
study visits should occur in the morning whenever possible.  On days of study visits, subjects 
will receive their dose at the clinic during the visit. 
Subjects are required to fast for at least 8 hours prior to all visits that include lipid profile 
panel testing (Day 1, Week 4, Week 12, and EOS).  During the fasting period, subjects 
should refrain from all food and liquids (water and permitted non-study medications are 
allowed). 
ECGs will be interpreted by a central reader for all visits.

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Urine pregnancy test must be performed prior to dosing with the investigational product for 
female subjects of childbearing potential, including adolescents aged 12 years and older, 
regardless of whether they have experienced menarche, through to the EOS visit.
Prior to attending a study visit, subjects are allowed to shower and bathe but should not 
moisturize or apply emollient. 
Refer to Appendix 4 for guidelines on subject safety monitoring and discontinuation. 
6.1. Visit 1, Screening
Subjects will be screened (Visit 1) within 28 days prior to administration of the 
investigational product to confirm that they meet the subject selection criteria for the study.  
The investigator (or an appropriate delegate at the investigator site) will obtain informed 
consent from each subject, or parent(s)/legal guardian (and assent from the subject, as 
appropriate), in accordance with the procedures described in the Subject Information and 
Consent in Section 12.3. 
If the Mantoux PPD tuberculin skin test is given, the subject must return between 
48-72 hours post-injection for induration evaluation.
Screening laboratory tests with abnormal results may be repeated once to confirm abnormal 
results; the last value will be used to determine eligibility.  If results return to normal within 
the 4-week screening period, the subject may enter the study. 
The following procedures will be completed: 

Obtain written informed consent; for subjects aged less than the legal age of majority 
(legal adulthood) in the subject’s country, obtain written informed consent from 
parent(s)/legal guardian, and informed assent from the patient (if age appropriate 
according to local regulations);

Register subject using the IRT system;

Collect demography;

Administer C-SSRS, SBQ-R and PHQ-8.  Subjects meeting any of the criteria 
specified in Exclusion Criterion 2 as described in Section 4.2 on the C-SSRS, SBQ-R 
and PHQ-8 should be excluded from participation; it is recommended the subject’s 
primary care physician (PCP) should be informed, and the subject referred to a mental 
health professional, either by the PCP or the investigator according to their usual 
practice;

Complete medical history, including history of alcohol and tobacco use.  Smoking 
status and average weekly alcohol consumption (units/week) will also be collected, 
where a unit contains 12 g of pure alcohol, an amount equivalent to that contained in 

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5 oz/150 ml (a glass) of wine, 12 oz/360 ml of beer, or 1.5 oz/45 ml of 90 proof 
(45% alcohol by volume) of spirits;

Complete AD disease history includes collection of details of AD: AD diagnosis and 
duration, the use of topical treatments, systemic treatments and other treatments for 
AD;

Obtain complete medication history of all prescription or nonprescription drugs, and 
dietary and herbal supplements taken within 28 days prior to the planned first dose, 
except as noted below:  
The following timeframe prior to the planned first dose must be used for collection of 
the following Current/Prior Medications:

1 year: Previous drug treatments for AD including the use of topical treatments, 
systemic treatments and other treatments; 

Any previous history of intolerance/allergy to any drug, regardless of indication.

Obtain vital signs including pulse rate, blood pressure, respiratory rate and oral or 
tympanic temperature (after at least 5 minutes of rest);

Obtain weight;

Obtain height;

Perform a single 12-lead electrocardiogram (ECG). Clinically significant or 
exclusionary ECG findings require screen failure;  

Conduct complete physical examination;

Dispense electronic patient reported outcome (ePRO) handheld device and instruct 
subject in how to use the device.  Instruct the subject to begin daily completion of the 
PSAAD (in selected countries) and pruritus NRS questionnaire; 

Pruritus NRS and Night Time Itch Scale will be collected daily in a subject eDiary 
during the screening period and from Day 1 to 15 and then on study visit days; 

PSAAD will be collected daily in a subject eDiary during the screening period and 
from Day 1 through the End of Study visit, in selected countries; 

Chest X-ray (posterior-anterior and lateral views) or other appropriate diagnostic 
image (ie, computerized tomography [CT] or magnetic resonance imaging [MRI]) are 
required for adults and recommended for adolescents (based on local guidelines and 
standard of care). Official reading must be located and available in the source 
documentation. Chest X-ray may be performed up to 12 weeks prior to Day 1;

Obtain samples for laboratory testing: serum chemistry, hematology (including 
coagulation panel), urinalysis, serum FSH (post-menopausal women) or serum 

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pregnancy test (women of childbearing potential, including adolescents aged 12 years 
and older, regardless of whether they have experienced menarche), HIV, hepatitis B 
surface antigen (HBsAg), hepatitis B core antibody (HBcAb), hepatitis B surface 
antibody (HBsAb), hepatitis C viral antibody (HCV Ab), hepatitis C viral ribonucleic 
acid (HCV RNA) (see Section 7.6.2.1), VZV IgG antibody testing for adolescent 
subjects who have not received at least one dose of a varicella vaccine;

For China and Republic of Korea only: Subjects who are HBsAg negative, 
HBcAb positive, and HBsAb positive will have reflex testing for HBV DNA;

For Japan only: In addition to HBsAg and HBcAb, HBsAb testing will be 
performed at Screening for all subjects rather than as a reflex test. Subjects with 
negative results for HBsAg, HBcAb and HBsAb may be eligible. Subjects who 
are HBsAg negative, HBcAb negative and HBsAb positive and provide 
documentation of prior HBV vaccination may be eligible and will not require 
HBV DNA monitoring during the study. Subjects who are HBsAg negative, 
HBcAb negative and HBsAb positive without documentation of prior HBV 
vaccination AND subjects who are HBsAg negative, HBcAb positive, and HBsAb 
positive at screening will have reflex testing for HBV DNA. Subjects who are 
HBV DNA negative or below LLQ may be randomized but will have HBV DNA 
repeated at Week 12 or early termination.

QuantiFERON– TB Gold test or locally analyzed T-SPOT.TB test (Japan only)
(unless performed within 12 weeks of Day 1).  If Mantoux PPD tuberculin skin 
test is required to be performed instead, per Section 7.3.4, the subject must return 
between 48-72 hours post-injection for evaluation of induration (see Section 7.3.4
for further details on TB testing);

Conduct clinical evaluations including IGA, SCORAD, EASI and BSA 
(calculated in the EASI);

Assess need for contraception and adherence to applicable lifestyle requirements 
(Section 4.4).  Establish willingness and ability to comply with lifestyle 
requirements going forward in the study;

Review Inclusion and Exclusion criteria for subject eligibility;

Assess for occurrence of Adverse Events: The adverse event and SAE reporting 
period starts with the signing of the informed consent document;

If the subject is eligible for continued participation, provide subject with 
emergency contact card.

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6.2.Treatment Period
6.2.1.Visit 2, Day 1/Week 0 (Baseline)
Administer patient-reported outcomes (PROs)including: PtGA, DLQI (or CDLQI), 
POEM,HADS, EQ-5D-5L (or EQ-5D-Y), SF-36v2, Acute, WPAI:AD and FACIT-F 
(or Peds-FACIT-F).  SF-36v2 and WPAI:AD will be completed by adult subjects 
only; 
Adolescents 12-17 years of age will not complete the SF-36v2 or WPAI:AD.  
Adolescents12-17 years of age will complete the CDLQI instead of the DLQI, the 
EQ-5D-Y instead of the EQ-5D-5L and Peds-FACIT-F instead of the FACIT-F;
Review eDiary pruritus NRS, Night Time Itch Scale, andPSAAD completion (in 
selected countries) and review eDiary procedures with subject as necessary;
Review any changes in the subject’s prior and concomitant medications and treatment 
information;
Obtain pre-dose vital signs including pulse rate, blood pressure, respiratory rate and 
oral or tympanic temperature (after at least 5minutes of rest);
Obtain weight;
Perform a single 12-lead electrocardiogram (ECG). Clinically significant or 
exclusionary ECG findings require screen failure; 
Conduct complete physical examination; 
Obtain fasting samples for laboratory testing: serum chemistry, hematology 
(including coagulation panel), lipid profile, and urinalysis; 
Urine pregnancy test (female subjects of childbearing potential, including adolescents 
aged 12 years and older, regardless of whether they have experienced menarche).  A 
negative urine pregnancy test must be obtained prior to dosing with the 
investigational product;

 
Collect sample for viral surveillance: Herpes simplex virus (HSV) HSV-1, HSV-2 
and VZV;
Conduct clinical evaluations including Fitzpatrick Skin Type Assessment, IGA, 
SCORAD, EASI and BSA (calculated in the EASI);
Photography of AD lesions (at selected sites; Section 7.7.5);
CCI

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
Assess need for contraception and adherence to applicable lifestyle requirements 
(Section 4.4).  Establish willingness and ability to comply with lifestyle requirements 
going forward in the study;

Review of Inclusion/Exclusion Criteria;

If subject continues to meet all Inclusion/Exclusion criteria, officially randomize 
subject into the study;

Dispense investigational product  to the subject;

Administer first dose of investigational product to subject;

Obtain an additional pulse rate and blood pressure (after at least 5 minutes of rest).  
Pulse rate and blood pressure must be performed at least 1 hour following the first 
dose of investigational product;

Assess and record any Adverse Events since the last visit.
6.2.2. Visit 3, Day 8/Week 1 (1 day)

Call subject and confirm compliance with daily completion of pruritus NRS, Night 
Time Itch Scale, and PSAAD (in selected countries);

Verbally confirm subject has been compliant with study dosing and entry in the 
eDiary.  Review eDiary procedures with subject as necessary;

Review any changes in the subject’s concomitant medications and treatment 
information;

Assess need for contraception and adherence to applicable lifestyle requirements 
(Section 4.4).  Establish willingness and ability to comply with lifestyle requirements 
going forward in the study;

Assess and record any Adverse Events since the last visit.
6.2.3. Visit 4, Day 15/Week 2 (1 day)

Administer PROs including PtGA, DLQI (or CDLQI), POEM, HADS and EQ-5D-5L 
(or EQ-5D-Y);  

Adolescents 12-17 years of age will complete the CDLQI instead of the DLQI and the 
EQ-5D-Y instead of the EQ-5D-5L;

Review pruritus NRS, Night Time Itch Scale, and PSAAD completion (in selected 
countries) and review eDiary procedures with subject as necessary.  Instruct subject 
that pruritus NRS and Night Time Itch Scale will now be completed only at visits on 
site and in the eDiary and will no longer be completed on a daily basis at home;

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
Urine pregnancy test (female subjects of childbearing potential, including adolescents 
aged 12 years and older, regardless of whether they have experienced menarche).  A 
negative urine pregnancy test must be obtained prior to dosing with the 
investigational product; 

Administer investigational product at clinic;

Perform a single 12-lead electrocardiogram (ECG);

Conduct targeted physical examination;

Obtain samples for laboratory testing: serum chemistry, hematology (including 
coagulation panel), and urinalysis;

Conduct clinical evaluations including IGA, SCORAD, EASI and BSA (calculated in 
the EASI);

Photography of AD lesions (at selected sites; Section 7.7.5); 

Obtain vital signs including pulse rate, blood pressure, respiratory rate and oral or 
tympanic temperature (after at least 5 minutes of rest).  Vital signs must be performed 
at least 1 hour following administration of investigational product;

Assess need for contraception and adherence to applicable lifestyle requirements 
(Section 4.4).  Establish willingness and ability to comply with lifestyle requirements 
going forward in the study;

Review any changes in the subject’s concomitant medications and treatments 
information;

Review eDiary to assess completion;

Perform drug accountability procedures;

Assess and record any Adverse Events since the last visit.
6.2.4. Visit 5, Day 29/Week 4 (2 day)

Administer PROs including PtGA, DLQI (or CDLQI), POEM, HADS and EQ-5D-5L 
(or EQ-5D-Y);  

Adolescents 12-17 years of age will complete the CDLQI instead of the DLQI and the 
EQ-5D-Y instead of the EQ-5D-5L;

Review PSAAD daily completion (in selected countries), Night Time Itch Scale, and 
pruritus NRS completion for this visit in the eDiary; 

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
Perform a single 12-lead electrocardiogram (ECG);

Conduct targeted physical examination;

Obtain fasting samples for laboratory testing: serum chemistry, hematology 
(including coagulation panel), lipid profile, and urinalysis; 

Urine pregnancy test (female subjects of childbearing potential, including adolescents 
aged 12 years and older, regardless of whether they have experienced menarche).  A 
negative urine pregnancy test must be obtained prior to dosing with the 
investigational product; 

Administer investigational product at clinic; 

Obtain vital signs including pulse rate, blood pressure, respiratory rate and oral or 
tympanic temperature (after at least 5 minutes of rest) and oral or tympanic 
temperature.  Vital signs must be performed at least 1 hour following administration 
of investigational product;

Conduct clinical evaluations including IGA, SCORAD, EASI and BSA (calculated in 
the EASI);

Photography of AD lesions (at selected sites; Section 7.7.5);

Assess need for contraception and adherence to applicable lifestyle requirements 
(Section 4.4).  Establish willingness and ability to comply with lifestyle requirements 
going forward in the study;

Review any changes in the subject’s concomitant medications and treatments 
information;

Review eDiary to assess completion;

Perform drug accountability procedures;

Dispense investigational product to the subject;

Assess and record any Adverse Events since the last visit.
6.2.5. Visit 6, Day 43/Week 6 (3 day)

Call subject and confirm compliance with daily completion of PSAAD (in selected 
countries);

Verbally confirm subject has been compliant with study dosing and entry in the 
eDiary.  Review eDiary procedures with subject as necessary;  

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
Review any changes in the subject’s concomitant medications and treatment 
information;

Assess need for contraception and adherence to applicable lifestyle requirements 
(Section 4.4).  Establish willingness and ability to comply with lifestyle requirements
going forward in the study;

Assess and record any Adverse Events since the last visit.
6.2.6. Visit 7, Day 57/Week 8 (3 day)

Administer PROs including PtGA, DLQI (or CDLQI), POEM, HADS and EQ-5D-5L 
(or EQ-5D-Y);

Adolescents 12-17 years of age will complete the CDLQI instead of the DLQI and the 
EQ-5D-Y instead of the EQ-5D-5L;

Review PSAAD daily completion (in selected countries), Night Time Itch Scale, and 
pruritus NRS completion for this visit in the eDiary; 

Urine pregnancy test (female subjects of childbearing potential, including adolescents 
aged 12 years and older, regardless of whether they have experienced menarche).  A 
negative urine pregnancy test must be obtained prior to dosing with the 
investigational product; 

Obtain blood samples for PK analysis 2.0 hours (30 min) pre-dose;

Administer investigational product at clinic;

Perform a single 12-lead electrocardiogram (ECG);

Conduct targeted physical examination;

Obtain samples for laboratory testing: serum chemistry, hematology (including 
coagulation panel), and urinalysis; 

Conduct clinical evaluations including IGA, SCORAD, EASI and BSA (calculated in 
the EASI);

Photography of AD lesions (at selected sites; Section 7.7.5);

Obtain vital signs including pulse rate, blood pressure, respiratory rate and oral or 
tympanic temperature (after at least 5 minutes of rest).  Vital signs must be performed 
at least 1 hour following administration of investigational product; 

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
Assess need for contraception and adherence to applicable lifestyle requirements 
(Section 4.4).  Establish willingness and ability to comply with lifestyle requirements 
going forward in the study;

Review any changes in the subject’s concomitant medications and treatments 
information;

Review eDiary to assess completion;

Perform drug accountability procedures;

Dispense investigational product to the subject; 

Assess and record any Adverse Events since the last visit.
6.2.7. Visit 8, Day 85/Week 12 (3 days) or Early Termination Visit

Administer PROs including PtGA, DLQI (or CDLQI), POEM, HADS, EQ-5D-5L (or 
EQ-5D-Y), SF-36v2, Acute, WPAI:AD and FACIT-F (or Peds-FACIT-F).  SF-36v2 
and WPAI:AD will be completed by adult subjects only; 

Adolescents 12-17 years of age will not complete the SF-36v2 or WPAI:AD.  
Adolescents 12-17 years of age will complete the CDLQI instead of the DLQI, the 
EQ-5D-Y instead of the EQ-5D-5L and Peds-FACIT-F instead of the FACIT-F;

Review PSAAD daily completion (in selected countries), Night Time Itch Scale, and
pruritus NRS completion for this visit in the eDiary; 

Urine pregnancy test (female subjects of childbearing potential, including adolescents 
aged 12 years and older, regardless of whether they have experienced menarche).  A 
negative urine pregnancy test must be obtained prior to dosing with the 
investigational product;

Obtain pre-dose vital signs including pulse rate, blood pressure, respiratory rate and 
oral or tympanic temperature (after at least 5 minutes of rest);

Obtain weight;

Obtain height;

Perform a single 12-lead electrocardiogram (ECG);

Conduct complete physical examination;

Obtain fasting samples for laboratory testing: serum chemistry, hematology 
(including coagulation panel), lipid profile, and urinalysis; 

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For China, Japan and Republic of Koreaonly: In subjects who had HBV DNA testing
at Screening, collect blood sample for repeat HBV DNA testing, as appropriate;

;
Administer investigational product at clinic;
Obtain blood samples for PK analysis 1.0hour (15min) and 2.0hours (30min)
post-dose. If the ET visit occurs after Week 8, collect PK samples only if the subject 
takes the investigational product at thesite visit;
Obtain an additional pulse rate and blood pressure (after at least 5minutes of rest).
Pulse rate and blood pressure must be performed at least 1 hour following 
administration of investigational product;
Conduct clinical evaluations including IGA, SCORAD, EASI and BSA (calculated in 
the EASI);
Photography of AD lesions (at selected sites; Section 7.7.5);
Assess need for contraception and adherence to applicable lifestyle requirements 
(Section4.4).  Establish willingness and ability to comply with lifestyle requirements 
going forward in the study;
Review any changes in the subject’s concomitant medication and treatments 
information;
Review eDiary to assess completion;
Perform drug accountability procedures;
Assess and record any Adverse Events since the last visit;
Subjects who complete the trial to this visit will be assessed for eligibility for 
participation in long-term extension study B7451015.Subjects who are not eligible 
or are not interested are to continue to Visit9 (see Section 6.3.1).
6.3.Follow-up Visits
6.3.1.Visit 9, Day 120/Week 16 (3 day) 
Administer PROs including PtGA, DLQI (or CDLQI), POEM, HADS, EQ-5D-5L (or 
EQ-5D-Y), SF-36v2, Acute, WPAI:AD and FACIT-F (or Peds-FACIT-F).  SF-36v2 
and WPAI:AD will be completed by adult subjects only;
Adolescents 12-17 years of age will not complete the SF-36v2 or WPAI:AD.  
Adolescents12-17 years of age will complete the CDLQI instead of the DLQI, the 
EQ-5D-Y instead of the EQ-5D-5L and Peds-FACIT-F instead of the FACIT-F; 
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
Review PSAAD daily completion (in selected countries), Night Time Itch Scale, and 
pruritus NRS completion for this visit in the eDiary;

Obtain vital signs including pulse rate, blood pressure, respiratory rate and oral or 
tympanic temperature (after at least 5 minutes of rest);

Perform a single 12-lead electrocardiogram (ECG);

Conduct targeted physical examination;

Obtain fasting samples for laboratory testing: serum chemistry, hematology 
(including coagulation panel), lipid profile, and urinalysis; 

Urine pregnancy test (female subjects of childbearing potential, including adolescents 
aged 12 years and older, regardless of whether they have experienced menarche); 

Conduct clinical evaluations including IGA, SCORAD, EASI and BSA (calculated in 
the EASI);

Photography of AD lesions (at selected sites; Section 7.7.5); 

Assess need for contraception and adherence to applicable lifestyle requirements 
(Section 4.4).  Establish willingness and ability to comply with lifestyle requirements 
going forward in the study;

Review any changes in the subject’s concomitant medications and treatments 
information;

Assess and record any Adverse Events since the last visit.
6.4. Subject Withdrawal
Ongoing safety concern at the time of subject withdrawal from the study:
If a subject has a clinically significant, treatment-emergent, abnormality at the time of 
withdrawal from the study, the Pfizer Medical Monitor (or designee) should be notified and 
every effort should be made to arrange follow-up evaluations at appropriate intervals to 
document the course of the abnormality.  All abnormal laboratory events of clinical 
significance should be followed until the laboratory values have returned to normal or 
baseline levels or are deemed clinically stable.  Follow-up for abnormal laboratory findings 
and adverse events by the investigator is required until the event or its sequelae resolve or 
stabilize at a level acceptable to the investigator, and Pfizer concurs with that assessment.  
Refer to Appendix 4 for Guidelines for Monitoring and Discontinuation. 

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Withdrawal of consent:
Subjects (or parent(s)/legal guardian, as applicable) who request to discontinue receipt of 
study treatment will remain in the study.  If this request occurs at a scheduled visit, an end of 
treatment visit should be performed and the subject should enter into the follow-up period, 
with an end of study visit scheduled for 4 weeks after the end of treatment visit.  If the 
request occurs outside of a scheduled visit (eg, via telephone contact) the subject should be 
scheduled to return to site for an end of treatment visit within one week, and the subject 
should enter into the follow-up period, with an end of study visit scheduled for 4 weeks after 
the end of treatment visit. 
The only exception to this is when a subject (or parent(s)/legal guardian, as applicable) 
specifically withdraws consent for any further contact with him or her or persons previously 
authorized by the subject to provide this information.  Subjects (or parent(s)/legal guardian, 
as applicable) should notify the investigator in writing of the decision to withdraw consent 
from future follow-up, whenever possible.  The withdrawal of consent should be explained in 
detail in the medical records by the investigator, as to whether the withdrawal is only from 
further receipt of investigational product or also from study procedures and/or posttreatment 
study follow-up, and entered on the appropriate CRF page.  In the event that vital status 
(whether the subject is alive or dead) is being measured, publicly available information 
should be used to determine vital status only as appropriately directed in accordance with 
local law.
Lost to follow-up: 
All reasonable efforts must be made to locate subjects to determine and report their ongoing 
status.  This includes follow-up with persons authorized by the subject as noted above.  Lost 
to follow-up is defined by the inability to reach the subject after a minimum of 2 documented 
phone calls, faxes, or e-mails as well as lack of response by the subject to 1 registered mail 
letter.  All attempts should be documented in the subject’s medical records.  If it is 
determined that the subject has died, the site will use locally permissible methods to obtain 
the date and cause of death.  If the investigator’s use of a third-party representative to assist 
in the follow-up portion of the study has been included in the subject’s (or parent(s)/legal 
guardian, as applicable) informed consent, then the investigator may use a sponsor-retained 
third-party representative to assist site staff with obtaining the subject’s contact information 
or other public vital status data necessary to complete the follow-up portion of the study.  
The site staff and representative will consult publicly available sources, such as public health 
registries and databases, in order to obtain updated contact information.  If, after all attempts, 
the subject remains lost to follow-up, then the last-known-alive date as determined by the 
investigator should be reported and documented in the subject’s medical records.
Subjects may withdraw from the study at any time at their own request, or they may be 
withdrawn at any time at the discretion of the investigator or sponsor for safety (see also the 
Withdrawal From the Study Due to Adverse Events section) or behavioral reasons, or the 
inability of the subject to comply with the protocol-required schedule of study visits or 
procedures at a given study site.  Subjects that discontinue study treatment will remain in the 

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study and must have their end of treatment visit within 1 week after their last dose, and will 
then enter the 4 week follow up period.  See Appendix 4 for Guidelines for Monitoring and 
Discontinuation. 
If a subject does not return for a scheduled visit, every effort should be made to contact the 
subject.  All attempts to contact the subject and information received during contact attempts 
must be documented in the subject’s medical record.  In any circumstance, every effort 
should be made to document subject outcome, if possible.  The investigator should inquire 
about the reason for withdrawal, request that the subject return all unused investigational 
product(s), request that the subject return for a final visit, if applicable, and follow up with 
the subject regarding any unresolved AEs.
If the subject withdraws from the study, and also withdraws consent for disclosure of future 
information, no further evaluations should be performed, and no additional data should be 
collected.  The sponsor may retain and continue to use any data collected before such 
withdrawal of consent.
7. ASSESSMENTS
Every effort should be made to ensure that the protocol-required tests and procedures are 
completed as described.  However, it is anticipated that from time to time there may be 
circumstances outside of the control of the investigator that may make it unfeasible to 
perform the test.  In these cases the investigator will take all steps necessary to ensure the 
safety and well-being of the subject.  When a protocol-required test cannot be performed, the 
investigator will document the reason for this and any corrective and preventive actions that 
he or she has taken to ensure that normal processes are adhered to as soon as possible.  The 
study team will be informed of these incidents in a timely manner.
For samples being collected and shipped, detailed collection, processing, storage, and 
shipment instructions and contact information will be provided to the investigator site prior 
to initiation of the study. 
7.1. Pregnancy Testing
For female subjects of childbearing potential, including adolescents aged 12 years and older, 
regardless of whether they have experienced menarche, a serum pregnancy test with a 
sensitivity of at least 25 mIU/mL, will be performed at screening.  A urine pregnancy test 
with a sensitivity of at least 25 mIU/mL, will be performed at every site visit including the 
End of Treatment (EOT) and follow-up visits to confirm the subject has not become pregnant 
during the study, and at the follow-up visit. 
A negative pregnancy test result is required before the subject may receive the investigational
product.  Pregnancy tests will also be done whenever 1 menstrual cycle is missed during the 
active treatment period (or when potential pregnancy is otherwise suspected).  Pregnancy 
tests may also be repeated if requested by institutional review boards (IRBs)/ethics 
committees (Ecs) or if required by local regulations. 

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Urine pregnancy tests must be sensitive to at least 25mIU/mL and will be conducted with the 
test kit provided by the central laboratory in accordance with instructions provided in its 
package insert.  Subjects who have missed a menstrual period or who show an indeterminate 
or positive result on the urine test may not further progress in the study until pregnancy is 
ruled out using further diagnostic testing (eg,a negative quantitative serumpregnancy test 
conducted at a certified laboratory).
In the case of a positive confirmed pregnancy, the subject will be withdrawn from 
administration of investigational product but may remain in the study.
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
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7.3.Safety Assessments
Safety will be assessed by the spontaneous reporting of AEs, physical examinations, vital 
signs and clinical laboratory results in all subjects who receive at least one dose of the 
investigational product.  Unscheduled safety assessments may be performed at any time 
during the study to assess any perceived safety concerns.  Investigators and Pfizer Clinicians 
(or designees) will review individual subject data throughout the conduct of the study to 
ensure subjects’ well-being.
7.3.1.Vitals Signs
Vital signs (sitting blood pressure, pulse rate, respiratory rates and temperature) will be 
measured after 5minutes of rest as indicated in the Schedule of Activities. 
Body temperature will be collected using the tympanic or oral methods and the same method 
should be used consistently throughout the study. 
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Blood pressure (BP) will be measured using a standard calibrated blood pressure measuring 
device.  A BP device that uses multiple cuff sizes based on the arm circumference is the 
required type of device.  The appropriate cuff size for the subject must be used to ensure 
accurate measurement.  The arm circumference at the midpoint of the length of the upper arm 
should be measured to determine the appropriate cuff size in accordance with the 
specifications of the BP measuring device.  The same properly sized and calibrated blood 
pressure cuff will be used to measure blood pressure each time. 
Subjects should be seated in a chair, back supported, and arms bared (free of restrictions such 
as rolled-up sleeves, etc.) and supported at heart level.  Measurements should be taken on the 
same arm at each visit (preferably non-dominant).  Subjects should refrain from smoking or 
ingesting caffeine during the 30 minutes preceding the measurements.  Measurements should 
begin after at least 5 minutes of rest. 
Heart rate should be measured at approximately the same time as BP for a minimum of 
30 seconds.  When the timing of BP and pulse (heart) rate measurements coincides with a 
blood collection or other study procedure, BP and pulse (heart) rate should be obtained first.
7.3.2. Medical History, Physical Examination, Height, and Weight
Complete AD disease history includes collection of details of AD at Screening: AD 
diagnosis, the use of topical treatments, systemic treatments and other treatments for AD.  
Medical history in addition to AD history including disease duration will be collected at 
screening.  Medical history also includes history of alcohol and tobacco use.  Smoking status 
and average weekly alcohol consumption (units/week) will be collected, where a unit 
contains 12 g of pure alcohol, an amount equivalent to that contained in 5 oz/150 mL (a 
glass) of wine, 12 oz/360 mL of beer, or 1.5 oz/45 mL of 90 proof of spirits.  Height and 
weight will be measured without the subject wearing shoes.  Height (inches or centimeters) 
and weight (lbs. or kg) will be measured and recorded in the source document at the 
screening visit.  Weight (lbs. or kg) will continue to be measured and recorded at various 
time points, see Schedule of Activities.
Complete physical examinations must be performed by the investigator, sub-investigator or a 
qualified health professional per local guidelines.  Complete physical examinations consist of 
assessments of general appearance; skin; head, eyes, ears, nose and throat (HEENT); mouth, 
heart; lungs; breast (optional); abdomen; external genitalia (optional); extremities; neurologic 
function; and lymph nodes.
Targeted physical examinations must be performed by the investigator, sub-investigator or a 
qualified health professional per local guidelines and should include skin, heart, lungs, and 
abdomen and examination of body systems where there are symptom complaints by the 
subject. 
Complete and Targeted physical examinations are performed at various time points, see 
Schedule of Activities.

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7.3.3. Chest X-Ray
Chest radiograph (posterior-anterior and lateral views) are required for adults and 
recommended for adolescents (as per local guidelines and standard of care) or other 
appropriate diagnostic image (ie, computed tomography [CT] or magnetic resonance imaging
[MRI]) with no evidence of current, active TB or previous inactive TB, taken at screening or 
within 12 weeks prior to Study Day 1 and read by a qualified radiologist.  Documentation of 
the official reading must be located and available in the source documentation.
7.3.4. Tuberculosis Testing
At the time of screening, all subjects will undergo tuberculosis (TB) testing unless performed 
within 12 weeks of Day 1.  QuantiFERON-TB Gold In-Tube Test is the preferred testing 
method.  If the QuantiFERON-TB Gold In-Tube test cannot be performed, or if the results 
cannot be determined by the reference laboratory to be either positive or negative, then 
subjects may be screened using the Purified Protein Derivative (PPD) Tuberculin Skin Test 
(Mantoux method) with approval of the Pfizer Medical Monitor. 
In addition to TB testing as specified in this clinical protocol, a chest X-ray will be 
performed to aid in TB status determination for all adults, and recommended for adolescents 
according to local guidelines and standard of care and/or in countries with a high incidence 
rate of TB. 
QuantiFERON-TB Gold In-Tube is an in vitro diagnostic test using a peptide cocktail 
simulating ESAT-6, CFP-10 and TB 7.7 proteins to stimulate cells in heparinized whole 
blood.  Detection of interferon-gamma by Enzyme-Linked Immunosorbent Assay (ELISA) is 
used to identify in vitro responses to these peptide antigens that are associated with 
Mycobacterium tuberculosis infection.  QuantiFERON-TB Gold In-Tube is an indirect test 
for M. tuberculosis infection (including disease) and is intended for use in conjunction with 
risk assessment, radiography and other medical and diagnostic evaluations.
A blood sample (approximately 3 mL) will be collected at screening for QuantiFERON-TB 
Gold In-Tube testing.  Following sample processing, the sample will be shipped to the 
sponsor’s designated reference laboratory for testing.  The procedure for processing and 
preparing the sample for shipment is described fully in the laboratory manual, which will be 
provided to investigators.
A negative PPD test can be substituted for the QuantiFERON-TB Gold In-Tube test only if 
the central laboratory is unable to perform the QuantiFERON-TB Gold In-Tube test or 
cannot determine the results to be positive or negative and the Pfizer Medical Monitor 
approves it, on a case-by-case basis.  
Japan only: While QuantiFERONis the preferred testing method, the T-SPOT.TB test is 
also acceptable as the screening TB test. Like QuantiFERON, the T-SPOT.TB test is an in 
vitro diagnostic test for M. tuberculosis infection; however, it differs in that it uses a peptide 
cocktail of ESAT-6 and CFP-10 proteins to stimulate peripheral blood mononuclear cells. 

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T-SPOT.TB testing will be performed at the site’s local laboratory. Borderline results from 
the T-SPOT.TB test should be considered exclusionary. If the T-SPOT.TB test results are 
indeterminate, the test should be repeated. If the result of the repeat test is indeterminate, 
subjects may be screened using the Mantoux/PPD skin test with Pfizer Medical Monitor 
approval.
Purified Protein Derivative (PPD) Test
If the QuantiFERON-TB Gold In-Tube test or the T-SPOT.TB test (Japan only) cannot be 
performed, or if the results cannot be determined to be positive or negative, then subjects 
may be screened using the Purified Protein Derivative (PPD) Tuberculin Test (Mantoux 
method), with the approval of the Pfizer Medical Monitor. 
Subjects must have the PPD test administered and evaluated by a health care professional 
48 to 72 hours later in order to be eligible for the study, unless performed and documented 
within the last 3 months.  The test should be performed according to local standards with 
induration of <5 mm required for inclusion.
7.3.5. Electrocardiogram
A single 12-lead ECG will be collected at screening and all other on-site visits as specified in 
the Schedule of Activities.  ECGs reading will be performed by a central reader.
All scheduled ECGs should be performed after the subject has rested quietly for at least 
10 minutes in a supine position. 
A subject’s screening ECG must be within normal limits prior to randomization.
7.3.6. Special Safety Assessment
In the event of a suspected opportunistic infection, effort should be made to identify the 
pathogen utilizing laboratory or other methods appropriate to the clinical situation. 
In case of a suspected viral skin infection (eg, herpes zoster and herpes simplex or eczema 
herpeticum), a specimen for viral DNA may be analyzed locally for confirmation and results 
provided to the adjudication committee to support evaluation.  
For subjects with a past history of oral or genital HSV and a presentation consistent to prior 
infections, further laboratory analysis may be performed at the discretion of the investigator. 
7.4. Skin Type Assessment
As part of baseline characteristics, a skin type assessment will be done at the Day 1 visit 
using the Fitzpatrick Skin Type assessment (Refer to Appendix 5).  This is used to classify a 
person’s skin type by their response to sun exposure (ie, burning or tanning).

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7.5. Assessment of Suicidal Ideation and Behavior
Subjects meeting exclusionary results as described in Section 4.2 on the C-SSRS, SBQ-R and 
PHQ-8 should be excluded from participation; it is recommended the subject’s primary care 
physician (PCP) should be informed, and the subject referred to a mental health professional, 
either by the PCP or the investigator according to their usual practice.
7.5.1. Columbia Suicide Severity Rating Scale (C-SSRS)
The Columbia Suicide Severity Rating Scale is a validated tool for investigative staff to use 
to evaluate suicidal ideation and behavior (Appendix 17).17  At the screening visit, if there 
are “yes” answers on items 4 or 5 in the past year or on any question in the suicidal behavior 
section of the C-SSRS in the past 5 years, the subject will not be included in the study.  
Trained site staff is to administer the C-SSRS to all subjects at screening and assess the 
subject’s eligibility based on the answers.
7.5.2. Suicidal Behaviors Questionnaire-Revised (SBQ-R)
The Suicidal Behaviors Questionnaire-Revised (Appendix 18) is a patient-reported 
questionnaire consisting of 4 items to assess suicidal ideation, suicide attempts, threat of 
suicidal behavior, and likelihood of suicidal behavior.  At the Screening Visit, if SBQ-R total 
score 8, the subject will not be included in the study.18  Site staff is to administer the SBQ-R 
to all subjects at screening and score immediately.
7.5.3. Patient Health Questionnaire – 8 items (PHQ-8)
The Patient Health Questionnaire – 8 items (Appendix 19) is a patient-reported questionnaire 
consisting of 8 items to assess the subject’s depression level.  At Screening Visit, if PHQ-8 
total score 15, the subject will not be included in the study.19  Site staff is to administer the 
PHQ-8 to all subjects at screening and score immediately.
7.6. Clinical Laboratory Tests
7.6.1. Blood Volume
Total blood sampling volume planned for this study is approximately 124 mL.  Further 
details regarding the collection, processing, storage, and shipping of the blood samples will 
be provided in the lab manual.
7.6.2. Laboratory Tests
The following laboratory tests will be performed at time points identified in the Schedule of 
Activities.  Unscheduled clinical labs may be obtained at any time during the study to assess 
any perceived safety concerns at the investigator’s discretion.
Sample collection, labeling, storage, and shipping information can be found in the laboratory 
manual.  All laboratory tests with clinically important changes from baseline identified after 
administration of investigational product will be followed until the value stabilizes.

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Subjects must abstain from all food and drink (except water and non-study medications) for 
an 8-hour overnight fast prior to labs that include the lipid profile panel on Day 1, Week 4, 
Week 12, and EOS.  All other labs do not require fasting.
Laboratory Tests
Hematology
Serum Chemistry
Urinalysis
Other
Hemoglobin
Hematocrit
RBC count and indices 
(MCH, MCHC, MCV, RBC
Morphology)
Reticulocyte count
Platelet count
WBC count with differential
Total neutrophils (%, Abs)
Eosinophils (%, Abs)
Monocytes (%, Abs)
Basophils (%, Abs)
Lymphocytes (%, Abs)
Coagulation Panel
Activated Partial 
Thromboplastin Time 
(APTT) 
Prothrombin 
Time/International 
Normalized Ratio 
(PT/INR)
BUN and Creatinine
Creatine Phosphokinase
Glucose
Na+, K+, Cl- ,Ca++
Total CO2 (Bicarbonate)
AST, ALT
GGT
Total, Indirect & Direct Bilirubin
Alkaline phosphatase
Lactate dehydrogenase 
Uric acid
Albumin
Total protein
Lipid Profile Panelf
Total cholesterol
LDL 
HDL
Triglycerides
pH
Glucose (qual)
Protein (qual)
Blood (qual)
Ketones
Nitrites
Leukocyte esterase
Microscopy and/or 
cultured
HIVa
HBsAga
HBcAba
HBsAbb
HCVAba
HCV RNAb
VZV IgG Abg
Serum FSH (WONCBP 
only) or Pregnancy Testa, c
Urine pregnancy testc
QFT-G or PPD (if 
applicable) or T-SPOT.TB
test (Japan only)e
HSV-1, HSV-2, VZV
HBV DNAh
a.
At Screening only. HIV testing will be performed for all subjects.
b.
HBsAb reflex testing only if HBsAg negative but HBcAb positive.  HCV RNA is reflex testing only if 
HCVAb is positive. For Japan only: In addition to HBsAg and HBcAb, HBsAb testing will be performed 
at Screening for all subjects rather than as a reflex test.  
c.
Pregnancy testing for females of childbearing potential, including adolescents aged 12 years and older, 
regardless of whether they have experienced menarche; serum FSH for women who have been amenorrheic 
for at least 12 consecutive months.
d.
Microscopy with culture performed as appropriate. 
e.
PPD results should be read within 48 to 72 hours. For Japan only: QFT-G is preferred but T-SPOT.TB test 
may be performed instead through the site’s local laboratory.
f.
Lipid Profile Panel requires at least an 8 hour fast.  Lipid profile panel will be completed at Day 1, Week 4, 
Week 12, and EOS, and will include total cholesterol, LDL, HDL, and triglycerides. 
g.
Only for adolescents who do not have documentation of at least one dose of varicella vaccine.
h.
For China and Republic of Korea only: Subjects who are HBsAg negative, HBcAb positive, and HBsAb
positive at Screening will have reflex testing for HBV DNA. Subjects who have HBV DNA above LLQ 
will be excluded. Subjects who are HBV DNA negative or below LLQ may be randomized but will have 
repeat HBV DNA testing at Week 12 (or early termination).
For Japan only: Subjects with negative results for HBsAg, HBcAb and HBsAb tests may be eligible. 
Subjects who are HBsAg negative, HBcAb negative and HBsAb positive and provide documentation of 
prior HBV vaccination may be eligible and will not require HBV DNA monitoring during the study.
Subjects who are HBsAg negative, HBcAb negative and HBsAb positive without documentation of prior 
HBV vaccination AND subjects who are HBsAg negative, HBcAb positive, and HBsAb positive at 
Screening will have reflex testing for HBV DNA.  Subjects who are HBV DNA negative or below LLQ 
may be randomized but will have HBV DNA repeated at Week 12 or early termination.

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Clinically significant abnormal findings should be recorded as AEs.  Abnormal test results 
determined to be caused from laboratory error should not be reported as AEs. Clinically 
significant laboratory findings at the final assessment should be followed to resolution or 
until determined by the investigator to be stabilized.  Repeat tests may be indicated to 
establish this.  Refer to Appendix 4 for Guidelines on Monitoring and Discontinuation.
7.6.2.1. Hepatitis Testing 
Hepatitis B testing: HB surface antigen (HBsAg), HB core antibody (HBcAb), HB surface 
antibody (HBsAb).
Interpretation of Hepatitis B Testing Results:  

HBsAg negative and HBcAb negative: Subject is eligible for the study;

HBsAg positive and HBcAb negative: Subject is excluded from study participation;

HBsAg negative and HBcAb positive and HBsAb positive: Subject is eligible for 
study;

HBsAg negative and HBcAb positive and HBsAb negative: Subject is excluded from 
study participation.
For China and Republic of Korea only:

Subjects who are HBsAg negative, HBcAb positive, and HBsAb positive at 
Screening will have reflex testing for HBV DNA. Subjects who have HBV DNA 
above LLQ will be excluded. Subjects who are HBV DNA negative or below LLQ
may be randomized but will have repeat HBV DNA testing at Week 12 (or early 
termination).
For Japan only:

In addition to HBsAg and HBcAb, HBsAb testing will be performed at Screening for 
all subjects rather than as a reflex test. Subjects with negative results for HBsAg, 
HBcAb and HBsAb may be eligible. Subjects who are HBsAg negative, HBcAb 
negative and HBsAb positive and provide documentation of prior HBV vaccination
may be eligible and will not require HBV DNA monitoring during the study.
Subjects who are HBsAg negative, HBcAb negative and HBsAb positive without 
documentation of prior HBV vaccination AND subjects who are HBsAg negative, 
HBcAb positive, and HBsAb positive at screening will have reflex testing for HBV 
DNA.  Subjects who are HBV DNA negative or below LLQ may be randomized but 
will have HBV DNA repeated at Week 12 or early termination.

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Hepatitis C testing: Hepatitis C Antibody (HCV Ab), Hepatitis C Viral RNA (HCV RNA 
for confirmation of positive HCV Ab result).  Interpretation of Hepatitis C Testing Results:

HCV Ab positive and HCV RNA positive: Subject is excluded from study 
participation. 
7.6.2.2. Varicella Zoster Virus (VZV) IgG Antibody (Ab) Testing
Adolescent subjects without documented evidence of having received at least a single dose of 
the varicella vaccine in countries where the varicella vaccine is approved and standard of 
care will be tested for varicella zoster virus IgG Ab as described in the lab manual.  Subjects 
that lack evidence of prior exposure to varicella zoster virus based on serological VZV IgG 
Ab testing are excluded.
7.6.2.3. Baseline Viral Screen 
A serum sample will be collected at baseline but analyzed only if the subject has suspected 
varicella or herpes zoster.  In that event, the sample would be analyzed for HSV1, HSV2 and 
VZV.  Additional sample collection instructions will be provided in the lab manual (Schedule 
of Activities).  The retained samples will be destroyed upon subject completion of this study 
or the long-term extension study. 
7.7. Efficacy Assessments
7.7.1. Rater Qualifications
Clinical evaluations of atopic dermatitis will be performed by an experienced and qualified
dermatologist (board certified or equivalent). An experienced and qualified 
non-dermatologist physician or experienced medical professional with experience in the
conduct of AD clinical trials may be permitted to perform the clinical evaluations of atopic
dermatitis when designated by the primary site Investigator.  The evaluator must receive and 
document protocol specific and applicable efficacy assessment scales training prior to 
performing these evaluations.  To assure consistency and reduce variability, the same
evaluator must assess all dermatological clinical evaluations for any individual subject
throughout the study whenever possible; a back-up experienced and qualified, 
protocol-trained evaluator will only be allowed and documented in case of emergency or
special situations when the designated evaluator is unable to perform the evaluation.
7.7.2. Investigator’s Global Assessment (IGA)
The Investigator’s Global Assessment of atopic dermatitis is scored on a 5-point scale (0-4), 
reflecting a global consideration of the erythema, induration and scaling.  The clinical 
evaluator of atopic dermatitis will perform an assessment of the overall severity of atopic 
dermatitis and assign an IGA score and category as described in Table 3.  The assessment 
will be a static evaluation without regard to the score at a previous visit.

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Table 3.
Investigator’s Global Assessment (IGA) Score
Score
Category
Description
0
Clear
Atopic dermatitis is cleared, except for any residual discoloration 
(post-inflammatory hyperpigmentation and/or hypopigmentation).
1
Almost 
Clear
Overall, the atopic dermatitis is not entirely cleared and remaining lesions 
are light pink (not including post inflammatory hyperpigmentation) and/or; 
have barely palpable hard thickened skin and/or papules and/or; have barely 
perceptible lichenification; excoriation and oozing/crusting are absent.
2
Mild
Overall, the atopic dermatitis consists of lesions that are light red; with 
slight, but definite hard thickened skin and/or papules; with slight, but 
definite linear or picked scratch marks or penetrating surface injury; with 
slight, but definite thickened skin, fine skin markings, and lichenoid scale; 
oozing/crusting is absent.
3
Moderate
Overall, the atopic dermatitis consists of lesions that are red; with easily 
palpable moderate hard thickened skin and/or papules; with moderate linear 
or picked scratch marks or penetrating surface injury; with moderate 
thickened skin, coarse skin markings, and coarse lichenoid scale; with slight 
oozing/crusting.
4
Severe
Overall, the atopic dermatitis consists of lesions that are deep, dark red; with 
severe hard thickened skin and/or papules; with severe linear or picked 
scratch marks or penetrating surface injury; with severe thickened skin with 
very coarse skin markings and lichenoid scale; with moderate to severe 
oozing/crusting.
The IGA will exclude scalp, palms, and soles from the assessment/scoring.
7.7.3. Eczema Area and Severity Index (EASI)
The EASI quantifies the severity of a subject’s atopic dermatitis based on both severity of 
lesion clinical signs and the percent of BSA affected.  EASI is a composite scoring by the 
atopic dermatitis clinical evaluator of the degree of erythema, induration/papulation, 
excoriation, and lichenification (each scored separately) for each of four body regions, with 
adjustment for the percent of BSA involved for each body region and for the proportion of 
the body region to the whole body.
Lesion Severity by Clinical Signs: The basic characteristics of atopic dermatitis 
lesions-erythema, induration/papulation, excoriation, and lichenification-provide a means for 
assessing the severity of lesions.  Assessment of these four main clinical signs is performed 
separately for four body regions: head and neck, upper limbs, trunk (including axillae and 
groin) and lower limbs (including buttocks).  Average erythema, induration/papulation, 
excoriation, and lichenification are scored for each body region according to a 4 point scale: 
0 = absent; 1 = mild; 2 = moderate; 3 = severe.  Morphologic descriptors for each clinical 
sign severity score are shown in Table 4.

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Table 4.
Clinical Sign Severity Scoring Criteria for the Eczema Area and Severity 
Index (EASI)
Score
Description*
Erythema (E)
0
Absent
None; may have residual discoloration (post-inflammatory 
hyperpigmentation and/or hypopigmentation).
1
Mild
Light pink to light red
2
Moderate
Red
3
Severe
Deep, dark red
Induration/Papulation (I)
0
Absent
None
1
Mild
Barely palpable to slight, but definite hard thickened skin and/or 
papules
2
Moderate
Easily palpable moderate hard thickened skin and/or papules
3
Severe
Severe hard thickened skin and/or papules
Excoriation (Ex)
0
Absent
None
1
Mild
Slight, but definite linear or picked scratch marks or penetrating 
surface injury
2
Moderate
Moderate linear or picked scratch marks or penetrating surface 
injury
3
Severe
Severe linear or picked scratch marks or penetrating surface 
injury
Lichenification (L)
0
Absent
None
1
Mild
Barely perceptible to slight, but definite thickened skin, fine skin 
markings, and lichenoid scale
2
Moderate
Moderate thickened skin, coarse skin markings, and coarse 
lichenoid scale
3
Severe
Severe thickened skin with very coarse skin markings and 
lichenoid scale
The EASI will exclude scalp, palms, and soles from the assessment/scoring.
Percent BSA with Atopic Dermatitis: The number of handprints of skin afflicted with 
atopic dermatitis in a body region can be used to determine the extent (%) to which a body 
region is involved with atopic dermatitis (Table 5).  When measuring, the handprint unit 
refers to the size of each individual subject’s hand with fingers in a closed position.

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Table 5.
Handprint Determination of Body Surface Area (BSA)
Body Region
Total Number of 
Handprints in Body 
Region*
Surface Area of Body 
Region Equivalent of One 
Handprint*
Head and Neck
10
10%
Upper Limbs
20
5%
Trunk (including axillae and 
groin/genitals)
30
3.33%
Lower Limbs (including 
buttocks)
40
2.5%
Handprint refers to the hand size of each individual subject.
* The number of handprints will be for the entire body region; these values will not be adjusted for exclusion 
of scalp, palms, and soles from the BSA assessment.
The extent (%) to which each of the four body regions is involved with atopic dermatitis is 
categorized to a numerical Area Score using a non-linear scaling method according to the 
following BSA scoring criteria (Table 6).
Table 6.
Eczema Area and Severity Index (EASI) Area Score Criteria
Percent BSA with Atopic Dermatitis in a Body Region
Area Score
0%
0
>0 - <10%
1
10 - <30%
2
30 - <50%
3
50 - <70%
4
70 - <90%
5
90 - 100%
6
Body Region Weighting: Each body region is weighted according to its approximate 
percentage of the whole body (Table 7).
Table 7.
Eczema Area and Severity Index (EASI) Body Region Weighting
Body Region
Body Region Weighting
Head and Neck
0.1
Upper Limbs
0.2
Trunk (including axillae and 
groin/genitals)
0.3
Lower Limbs (including buttocks)
0.4
* No adjustment for body regions excluded for assessment
In each body region, the sum of the Clinical Signs Severity Scores for erythema, 
induration/papulation, excoriation, and lichenification is multiplied by the Area Score and by 
the Body Region Weighting to provide a body region value, which is then summed across all 
four body regions resulting in an EASI score as described in Equation 3.

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Equation 3: EASI = 0.1Ah(Eh+Ih+Exh+Lh) + 0.2Au(Eu+Iu+ExU+Lu) + 
0.3At(Et+It+Ext+Lt) + 0.4Al(El+Il+Exl+Ll)
A = Area Score; E = erythema; I = induration/papulation; Ex = excoriation; 
L = lichenification; h = head and neck; u = upper limbs; t = trunk; l = lower limbs
The EASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores 
representing greater severity of atopic dermatitis.
7.7.3.1. Body Surface Area – Efficacy (BSA Efficacy)
BSA Efficacy will be derived from the sum of the BSA in handprints across 4 body regions 
assessed as part of the EASI assessment (Table 5).  Handprint refers to that of each 
individual subject for their own measurement.  The BSA Efficacy ranges from 0 to 
100%, with higher values representing greater severity of atopic dermatitis.  Since the scalp, 
palms, and soles will be excluded from the BSA (Efficacy) assessment, the maximum 
possible value will be less than 100%.
7.7.4. Scoring Atopic Dermatitis (SCORAD)
SCORAD is a validated scoring index for atopic dermatitis, which combines extent (0-100), 
severity (0-18), and subjective symptoms (0-20) based on pruritus and sleep loss, each scored 
(0-10). 
Extent (A, maximum score of 100%)
To determine extent of AD, rule of 9 is used to calculate body surface area affected by AD as 
a percentage of the whole body surface area.  Body surface area as percentage of total body 
surface area for each body region is as follows:

Head and neck 9%; 

Upper limbs 9% each; 

Lower limbs 18% each; 

Anterior trunk 18%; 

Back 18%; 

1% for genitals. 
The score for each body region is added up to determine the BSA affected by AD (A), which 
has a possible maximum score of 100%. 

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Severity (B, maximum score of 18)
A representative area of AD is selected.  In this area, the severity of each of the following 
signs is assessed as none (0), mild (1), moderate (2) or severe (3). 
Erythema (reddening);
Edema (swelling)/papulation;
Oozing/crusting; 
Excoriation (scratch marks);
Skin thickening (lichenification); 
Xerosis (dryness) (this is assessed in an area where there is no inflammation).
The severity scores are added together to give 
'B
' (maximum score of 18).
Subjective Symptoms (C, maximum score of 20)
Subjective symptoms(ie, itch and sleeploss) are each scored by the subject using a visual 
analog scale (VAS)where “0” is no itch (or no sleeploss) and “10” is the worst imaginable 
itch (or sleeploss). The value for each should reflect the average on a 10 point scale for the 
last 3 days/nights. These scores are added to give 
'C
' (maximum score of20). 
SCORAD Total Score
The SCORAD for an individual is calculated by the formula: A/5 + 7B/2 + C (can range 
from 0to 103). 
7.7.5.Photography of Representative ADLesions
For subjects at selected study sites, photographs of treated AD will be obtained (according to 
the separately provided Photography Instructions) at Baseline/Day1, Week 2, Week 4, 
Week 8, EOT, and EOS.  Areas photographed should be recorded in source documents so 
that the same AD body region(s) will be photographedat each time point.  Photographs will 
be utilized for illustrative purposes and not formally evaluated as an endpoint for analysis.
Photographic services will be provided through a central photography laboratory selected by 
the sponsor.  Detailed procedures to assure consistency will be provided separately in a 
central photography laboratory instruction manual.
 
  
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7.8.2.Night Time Itch Scale 
Severity of Night Time Itch
The severity of itch (pruritus) during the night due to atopic dermatitis will be assessed using 
the Night Time Itch Scale, a horizontal NRS (Appendix7). Subjects will be asked to assess 
their worst itching due to atopic dermatitis during their most recent night’s sleep on an NRS 
anchored by the terms “no itch”(0) and “worst itch imaginable” (10).  This item will be 
administered to all subjects.  Subjects will enter the Night Time Itch NRS assessment into an 
eDiary.
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Frequency of Night Time Itch
The frequency of itch (pruritus) during the night due to atopic dermatitis will be assessed 
using a horizontal NRS (Appendix7). Subjects will be asked to assess frequency of itching 
due to atopic dermatitis during their most recent night’s sleep on an NRS anchored by the 
terms “never/no itching” (0)and “always/constant itching” (10).  This item will be 
administered to all subjects.Subjects will enter the Night Time Itch NRS assessment into an 
eDiary.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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7.9.Pharmacokinetics
7.9.1.Plasma for Analysis of PF-04965842
During the study, blood samples (3mL) to provide minimum 1mL of plasma for PK analysis 
will be collected into appropriately labeled tubes containing potassium 
ethylenediaminetetraacetic acid (K
2EDTA) at times specified in the STUDY PROCEDURES
sectionof the protocol.
Blood for PK analysis will be collected at the study site at the following time points:
At 2.0hours (30min) pre-doseat Week 8; 
At 1.0hour (15min) and 2.0hours (30min) post-dose at Week12. 
All efforts will be made to obtain the PK samples at the exact nominal time relative to 
dosing.  The exact time of the sample collection is to be noted on the source document and 
data collection tool (eg, CRF).  Samples obtained outside the windows specified in the SOA
will be considered a protocol deviation. For ET visits, if the subject discontinues before 
Week 8 do not collect PK samples.  If the ET visit occurs after Week8, collect PK samples 
only if the subject takes the investigational product at the site visit.
The plasma will be stored in appropriately labeled screw-capped polypropylene tube 
at approximately -20C within 1hour of collection.
Further details regarding the collection, processing, storage and shipping of the blood 
samples will be provided in the lab manual.
Samples will be analyzed using a validated analytical method in compliance with 
Pfizer standard operating procedures. 
The PK samples must be processed and shipped as indicated to maintain sample 
integrity.  Any deviations from the PK processing steps, including any actions taken, 
must be documented and reported to the sponsor.  On a case-by-case basis, the 
sponsor may make a determination as to whether sample integrity has been 
compromised.  Any sample deemed outside of established stability, or of questionable 
integrity, will be considered a protocol deviation.
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
As part of understanding the PKs of the investigational product, samples may be used 
for metabolite identification and/or evaluation of the bioanalytical method.  These 
data will be used for internal exploratory purposes and will not be included in the 
clinical report.
7.9.2. Shipment of Pharmacokinetic Samples
The central laboratory will provide collection materials and directions for packaging and 
shipment of samples and will forward samples to the contract analytical laboratory.  The 
contract analytical laboratory will be provided with randomization codes so that only samples 
in the PF-04965842 treatment groups are assayed.  Placebo samples may be assayed in the 
event of suspected error in subject randomization.  Refer to the central lab vendor manual for 
further information.
8. ADVERSE EVENT REPORTING
8.1. Requirements
The table below summarizes the requirements for recording safety events on the CRF and for 
reporting safety events on the Clinical Trial (CT) Serious Adverse Event (SAE) Report Form 
to Pfizer Safety.  These requirements are delineated for 3 types of events: (1) SAEs; 
(2) non-serious adverse events (AEs); and (3) exposure to the investigational product under 
study during pregnancy or breastfeeding, and occupational exposure. 
Safety Event
Recorded on the CRF
Reported on the CT SAE 
Report Form to Pfizer 
Safety Within 24 Hours of 
Awareness
SAE
All
All
Non-serious AE
All
None
Exposure to the 
investigational product 
under study during 
pregnancy or 
breastfeeding, and 
occupational exposure
All (regardless of whether 
associated with an AE), 
except occupational 
exposure
Exposure during pregnancy, 
exposure via breastfeeding, 
occupational exposure 
(regardless of whether 
associated with an AE)
All observed or volunteered events regardless of treatment group or suspected causal 
relationship to the investigational product(s) will be reported as described in the following 
paragraphs.
Events listed in the table above that require reporting to Pfizer Safety on the CT SAE Report 
Form within 24 hours of awareness of the event by the investigator are to be reported 
regardless of whether the event is determined by the investigator to be related to an 
investigational product under study.  In particular, if the SAE is fatal or life-threatening, 
notification to Pfizer Safety must be made immediately, irrespective of the extent of available 
event information.  This time frame also applies to additional new (follow-up) information on 

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previously forwarded reports.  In the rare situation that the investigator does not become 
immediately aware of the occurrence of an event, the investigator must report the event 
within 24 hours after learning of it and document the time of his/her first awareness of the 
event.
For each event, the investigator must pursue and obtain adequate information both to 
determine the outcome and to assess whether it meets the criteria for classification as an SAE 
(see the Serious Adverse Events section below).  In addition, the investigator may be 
requested by Pfizer Safety to obtain specific follow-up information in an expedited fashion.  
This information is more detailed than that recorded on the CRF.  In general, this will include 
a description of the event in sufficient detail to allow for a complete medical assessment of 
the case and independent determination of possible causality.  Any information relevant to 
the event, such as concomitant medications and illnesses, must be provided.  In the case of a 
subject death, a summary of available autopsy findings must be submitted as soon as possible 
to Pfizer Safety.  Any pertinent additional information must be reported on the CT SAE 
Report Form; additional source documents (eg, medical records, CRF, laboratory data) are to 
be sent to Pfizer Safety ONLY upon request.
As part of ongoing safety reviews conducted by the sponsor, any non-serious AE that is 
determined by the sponsor to be serious will be reported by the sponsor as an SAE.  To assist 
in the determination of case seriousness, further information may be requested from the 
investigator to provide clarity and understanding of the event in the context of the clinical 
study.
8.1.1. Additional Details on Recording Adverse Events on the CRF
All events detailed in the table above will be recorded on the AE page(s) of the CRF.  It 
should be noted that the CT SAE Report Form for reporting of SAE information is not the 
same as the AE page of the CRF.  When the same data are collected, the forms must be 
completed in a consistent manner.  AEs should be recorded using concise medical 
terminology and the same AE term should be used on both the CRF and the CT SAE Report 
Form for reporting of SAE information.
8.1.2. Eliciting Adverse Event Information
The investigator is to record on the CRF all directly observed AEs and all AEs spontaneously 
reported by the study subject/parent(s)/legal guardian, if applicable.  In addition, each study 
subject/parent(s)/legal guardian, if applicable, will be questioned about the occurrence of 
AEs in a non-leading manner.
8.1.3. Withdrawal from the Study Due to Adverse Events (see also the Subject 
Withdrawal Section)
Withdrawal due to AEs should be distinguished from withdrawal due to other causes, 
according to the definition of AE noted below, and recorded on the CRF. 

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When a subject withdraws from the study because of an SAE, the SAE must be recorded on 
the CRF and reported, as appropriate, on the CT SAE Report Form, in accordance with the 
Requirements section above.
8.1.4. Time Period for Collecting AE/SAE Information
The time period for actively eliciting and collecting AEs and SAEs (“active collection 
period”) for each subject begins from the time the subject/parent(s)/legal guardian, if 
applicable, provides informed consent, which is obtained before the subject’s participation in 
the study (ie, before undergoing any study-related procedure and/or receiving investigational 
product), through and including a minimum of 28 calendar days; except as indicated below 
after the last administration of the investigational product.
For subjects who are screen failures, the active collection period ends when screen failure 
status is determined.
8.1.4.1. Reporting SAEs to Pfizer Safety
All SAEs occurring in a subject during the active collection period are reported to Pfizer 
Safety on the CT SAE Report Form.
SAEs occurring in a subject after the active collection period has ended are reported to Pfizer 
Safety if the investigator becomes aware of them; at a minimum, all SAEs that the 
investigator believes have at least a reasonable possibility of being related to investigational 
product must be reported to Pfizer Safety.
Follow up by the investigator continues throughout and after the active collection period and 
until the event or its sequelae resolve or stabilize at a level acceptable to the investigator, and 
Pfizer concurs with that assessment.
8.1.4.2. Recording Non-serious AEs and SAEs on the CRF
During the active collection period, both non-serious AEs and SAEs are recorded on the 
CRF.
Follow-up by the investigator may be required until the event or its sequelae resolve or 
stabilize at a level acceptable to the investigator, and Pfizer concurs with that assessment.
8.1.5. Causality Assessment
The investigator’s assessment of causality must be provided for all AEs (serious and 
non-serious); the investigator must record the causal relationship on the CRF, and report such 
an assessment in accordance with the SAE reporting requirements, if applicable.  An 
investigator’s causality assessment is the determination of whether there exists a reasonable 
possibility that the investigational product caused or contributed to an AE; generally the facts 
(evidence) or arguments to suggest a causal relationship should be provided.  If the 
investigator does not know whether or not the investigational product caused the event, then 
the event will be handled as “related to investigational product” for reporting purposes, as 

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defined by the sponsor.  If the investigator's causality assessment is “unknown but not 
related” to investigational product, this should be clearly documented on study records. 
In addition, if the investigator determines that an SAE is associated with study procedures, 
the investigator must record this causal relationship in the source documents and CRF, and 
report such an assessment in the dedicated section of the CT SAE Report Form and in 
accordance with the SAE reporting requirements.
8.1.6. Sponsor’s Reporting Requirements to Regulatory Authorities
AE reporting, including suspected unexpected serious adverse reactions, will be carried out 
in accordance with applicable local regulations.
8.2. Definitions
8.2.1. Adverse Events
An AE is any untoward medical occurrence in a study subject administered a product or 
medical device; the event need not necessarily have a causal relationship with the treatment 
or usage.  Examples of AEs include, but are not limited to: 

Abnormal test findings;

Clinically significant signs and symptoms;

Changes in physical examination findings;

Hypersensitivity;

Progression/worsening of underlying disease; 

Drug abuse;

Drug dependency.
Additionally, AEs may include signs and symptoms resulting from:

Drug overdose;

Drug withdrawal;

Drug misuse; 

Drug interactions;

Extravasation;

Exposure during pregnancy (EDP);

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
Exposure via breastfeeding;

Medication error;

Occupational exposure.
8.2.2. Abnormal Test Findings
Abnormal objective test findings should be recorded as AEs when any of the following 
conditions are met: 

Test result is associated with accompanying symptoms; and/or

Test result requires additional diagnostic testing or medical/surgical intervention; 
and/or

Test result leads to a change in study dosing (outside of any protocol-specified dose 
adjustments) or discontinuation from the study, significant additional concomitant 
drug treatment, or other therapy; and/or

Test result is considered to be an AE by the investigator or sponsor.
Merely repeating an abnormal test, in the absence of any of the above conditions, does not 
constitute an AE.  Any abnormal test result that is determined to be an error does not require 
recording as an AE.
8.2.3. Serious Adverse Events
A serious adverse event is any untoward medical occurrence at any dose that:

Results in death;

Is life-threatening (immediate risk of death);

Requires inpatient hospitalization or prolongation of existing hospitalization;

Results in persistent or significant disability/incapacity (substantial disruption of the 
ability to conduct normal life functions);

Results in congenital anomaly/birth defect.
Or that is considered to be:

An important medical event.

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Medical and scientific judgment is exercised in determining whether an event is an important 
medical event.  An important medical event may not be immediately life-threatening and/or 
result in death or hospitalization.  However, if it is determined that the event may jeopardize 
the subject or may require intervention to prevent one of the other AE outcomes, the 
important medical event should be reported as serious.
Examples of such events are intensive treatment in an emergency room or at home for 
allergic bronchospasm; blood dyscrasias or convulsions that do not result in hospitalization; 
or development of drug dependency or drug abuse.
8.2.4. Hospitalization
Hospitalization is defined as any initial admission (even less than 24 hours) in a hospital or 
equivalent healthcare facility, or any prolongation of an existing admission.  Admission also 
includes transfer within the hospital to an acute/intensive care unit (eg, from the psychiatric 
wing to a medical floor, medical floor to a coronary care unit, or neurological floor to a 
tuberculosis unit).  An emergency room visit does not necessarily constitute a hospitalization; 
however, the event leading to the emergency room visit is assessed for medical importance.
Hospitalization does not include the following:

Rehabilitation facilities;

Hospice facilities;

Respite care (eg, caregiver relief);

Skilled nursing facilities;

Nursing homes;

Same-day surgeries (as outpatient/same-day/ambulatory procedures).
Hospitalization or prolongation of hospitalization in the absence of a precipitating clinical 
AE is not in itself an SAE. Examples include:

Admission for treatment of a preexisting condition not associated with the 
development of a new AE or with a worsening of the preexisting condition (eg, for 
workup of a persistent pretreatment laboratory abnormality);

Social admission (eg, subject has no place to sleep);

Administrative admission (eg, for yearly physical examination);

Protocol-specified admission during a study (eg, for a procedure required by the study 
protocol);

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
Optional admission not associated with a precipitating clinical AE (eg, for elective 
cosmetic surgery);

Hospitalization for observation without a medical AE;

Preplanned treatments or surgical procedures.  These should be noted in the baseline 
documentation for the entire protocol and/or for the individual subject.
Diagnostic and therapeutic noninvasive and invasive procedures, such as surgery, should not 
be reported as SAEs.  However, the medical condition for which the procedure was 
performed should be reported if it meets the definition of an SAE.  For example, an acute 
appendicitis that begins during the reporting period should be reported if the SAE 
requirements are met, and the resulting appendectomy should be recorded as treatment of the 
AE.
8.3. Severity Assessment
If required on the AE page of the CRF, the investigator will use the adjectives MILD, 
MODERATE, or SEVERE to describe the maximum intensity of the AE.  For purposes of 
consistency, these intensity grades are defined as follows:
MILD
Does not interfere with subject's usual function.
MODERATE
Interferes to some extent with subject's usual function.
SEVERE
Interferes significantly with subject's usual function.
Note the distinction between the severity and the seriousness of an AE.  A severe event is not 
necessarily an SAE.  For example, a headache may be severe (interferes significantly with 
the subject's usual function) but would not be classified as serious unless it met one of the 
criteria for SAEs, listed above.
8.4. Special Situations
8.4.1. Protocol-Specified Serious Adverse Events
There are no protocol-specified SAEs in this study.  All SAEs will be reported to Pfizer 
Safety by the investigator as described in previous sections, and will be handled as SAEs in 
the safety database. 
8.4.2. Potential Cases of Drug-Induced Liver Injury
Humans exposed to a drug who show no sign of liver injury (as determined by elevations in 
transaminases) are termed “tolerators,” while those who show transient liver injury, but adapt 
are termed “adaptors.”  In some subjects, transaminase elevations are a harbinger of a more 
serious potential outcome.  These subjects fail to adapt and therefore are "susceptible" to 
progressive and serious liver injury, commonly referred to as drug-induced liver injury 
(DILI).  Subjects who experience a transaminase elevation above 3 times the upper limit of
normal (× ULN) should be monitored more frequently to determine if they are an “adaptor” 
or are “susceptible.”

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In the majority of DILI cases, elevations in aspartate aminotransferase (AST) and/or alanine 
aminotransferase (ALT) precede total bilirubin (TBili) elevations (>2 × ULN) by several 
days or weeks.  The increase in TBili typically occurs while AST/ALT is/are still elevated 
above 3 × ULN (ie, AST/ALT and TBili values will be elevated within the same lab sample).  
In rare instances, by the time TBili elevations are detected, AST/ALT values might have 
decreased.  This occurrence is still regarded as a potential DILI.  Therefore, abnormal 
elevations in either AST OR ALT in addition to TBili that meet the criteria outlined below 
are considered potential DILI (assessed per Hy’s law criteria) cases and should always be 
considered important medical events, even before all other possible causes of liver injury 
have been excluded.
The threshold of laboratory abnormalities for a potential DILI case depends on the subject’s 
individual baseline values and underlying conditions.  Subjects who present with the 
following laboratory abnormalities should be evaluated further as potential DILI (Hy’s law) 
cases to definitively determine the etiology of the abnormal laboratory values:

Subjects with AST/ALT and TBili baseline values within the normal range who 
subsequently present with AST OR ALT values >3 × ULN AND a TBili value 
>2 × ULN with no evidence of hemolysis and an alkaline phosphatase value 
<2 × ULN or not available;

For subjects with baseline AST OR ALT Or TBili values above the ULN, the 
following threshold values are used in the definition mentioned above, as needed, 
depending on which values are above the ULN at baseline:

Preexisting AST or ALT baseline values above the normal range: AST or ALT 
values >2 times the baseline values AND >3 × ULN; or >8 × ULN (whichever is 
smaller).

Preexisting values of TBili above the normal range: TBili level increased from 
baseline value by an amount of at least 1 × ULN or if the value reaches >3 × ULN 
(whichever is smaller).
Rises in AST/ALT and TBili separated by more than a few weeks should be assessed 
individually based on clinical judgment; any case where uncertainty remains as to whether it 
represents a potential Hy’s law case should be reviewed with the sponsor.
The subject should return to the investigator site and be evaluated as soon as possible, 
preferably within 48 hours from awareness of the abnormal results.  This evaluation should 
include laboratory tests, detailed history, and physical assessment. 
In addition to repeating measurements of AST and ALT and TBili, laboratory tests should 
include albumin, creatine kinase (CK), direct and indirect bilirubin, gamma-glutamyl 
transferase (GGT), prothrombin time (PT)/international normalized ratio (INR), total bile 
acids, alkaline phosphatase and acetaminophen drug and/or protein adduct levels.  
Consideration should also be given to drawing a separate tube of clotted blood and an 

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anticoagulated tube of blood for further testing, as needed, for further contemporaneous 
analyses at the time of the recognized initial abnormalities to determine etiology.  A detailed 
history, including relevant information, such as review of ethanol, acetaminophen (either by 
itself or as a co-formulated product in prescription or over-the-counter medications), 
recreational drug, supplement (herbal) use and consumption, family history, sexual history, 
travel history, history of contact with a jaundiced person, surgery, blood transfusion, history 
of liver or allergic disease, and potential occupational exposure to chemicals, should be 
collected.  Further testing for acute hepatitis A, B, C, D, and E infection and liver imaging 
(eg, biliary tract) may be warranted. 
All cases demonstrated on repeat testing as meeting the laboratory criteria of AST/ALT and 
TBili elevation defined above should be considered potential DILI (Hy’s law) cases if no 
other reason for the liver function test (LFT) abnormalities has yet been found.  Such 
potential DILI (Hy’s law) cases are to be reported as SAEs, irrespective of availability 
of all the results of the investigations performed to determine etiology of the LFT 
abnormalities.
A potential DILI (Hy’s law) case becomes a confirmed case only after all results of 
reasonable investigations have been received and have excluded an alternative etiology.
8.4.3. Exposure to the Investigational Product During Pregnancy or Breastfeeding, and 
Occupational Exposure
Exposure to the investigational product under study during pregnancy or breastfeeding and 
occupational exposure are reportable to Pfizer Safety within 24 hours of investigator 
awareness.
8.4.3.1. Exposure During Pregnancy
For both unapproved/unlicensed products and for marketed products, an exposure during 
pregnancy (EDP) occurs if:

A female becomes, or is found to be, pregnant either while receiving or having been 
exposed (eg, because of treatment or environmental exposure) to the investigational 
product; or the female becomes or is found to be pregnant after discontinuing and/or 
being exposed to the investigational product;

An example of environmental exposure would be a case involving direct contact with 
a Pfizer product in a pregnant woman (eg, a nurse reports that she is pregnant and has 
been exposed to chemotherapeutic products);

A male has been exposed (eg, because of treatment or environmental exposure) to the 
investigational product prior to or around the time of conception and/or is exposed 
during his partner’s pregnancy. 

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If a subject or subject’s partner becomes or is found to be pregnant during the subject’s 
treatment with the investigational product, the investigator must report this information to 
Pfizer Safety on the CT SAE Report Form and an EDP supplemental form, regardless of 
whether an SAE has occurred.  In addition, the investigator must submit information 
regarding environmental exposure to a Pfizer product in a pregnant woman (eg, a subject 
reports that she is pregnant and has been exposed to a cytotoxic product by inhalation or 
spillage) to Pfizer Safety using the EDP supplemental form.  This must be done irrespective 
of whether an AE has occurred and within 24 hours of awareness of the exposure.  The 
information submitted should include the anticipated date of delivery (see below for 
information related to termination of pregnancy).
Follow-up is conducted to obtain general information on the pregnancy and its outcome for 
all EDP reports with an unknown outcome.  The investigator will follow the pregnancy until 
completion (or until pregnancy termination) and notify Pfizer Safety of the outcome as a 
follow-up to the initial EDP supplemental form.  In the case of a live birth, the structural 
integrity of the neonate can be assessed at the time of birth.  In the event of a termination, the 
reason(s) for termination should be specified and, if clinically possible, the structural 
integrity of the terminated fetus should be assessed by gross visual inspection (unless 
pre-procedure test findings are conclusive for a congenital anomaly and the findings are 
reported).
If the outcome of the pregnancy meets the criteria for an SAE (ie, ectopic pregnancy, 
spontaneous abortion, intrauterine fetal demise, neonatal death, or congenital anomaly [in a 
live-born baby, a terminated fetus, an intrauterine fetal demise, or a neonatal death]), the 
investigator should follow the procedures for reporting SAEs.
Additional information about pregnancy outcomes that are reported to Pfizer Safety as SAEs 
follows: 

Spontaneous abortion includes miscarriage and missed abortion;

Neonatal deaths that occur within 1 month of birth should be reported, without regard 
to causality, as SAEs.  In addition, infant deaths after 1 month should be reported as 
SAEs when the investigator assesses the infant death as related or possibly related to 
exposure to the investigational product.

Additional information regarding the EDP may be requested by the sponsor.  Further 
follow-up of birth outcomes will be handled on a case-by-case basis (eg, follow-up on 
preterm infants to identify developmental delays).  In the case of paternal exposure, 
the investigator will provide the subject with the Pregnant Partner Release of 
Information Form to deliver to his partner.  The investigator must document in the 
source documents that the subject was given the Pregnant Partner Release of 
Information Form to provide to his partner.

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8.4.3.2. Exposure During Breastfeeding
Scenarios of exposure during breastfeeding must be reported, irrespective of the presence of 
an associated SAE, to Pfizer Safety within 24 hours of the investigator’s awareness, using the
CT SAE Report Form.  An exposure during breastfeeding report is not created when a Pfizer 
drug specifically approved for use in breastfeeding women (eg, vitamins) is administered in 
accord with authorized use.  However, if the infant experiences an SAE associated with such 
a drug’s administration, the SAE is reported together with the exposure during breastfeeding.
8.4.3.3. Occupational Exposure
An occupational exposure occurs when, during the performance of job duties, a person 
(whether a healthcare professional or otherwise) gets in unplanned direct contact with the 
product, which may or may not lead to the occurrence of an AE.
An occupational exposure is reported to Pfizer Safety within 24 hours of the investigator’s 
awareness, using the CT SAE Report Form, regardless of whether there is an associated 
SAE.  Since the information does not pertain to a subject enrolled in the study, the 
information is not recorded on a CRF; however, a copy of the completed CT SAE Report 
Form is maintained in the investigator site file.
8.4.4. Medication Errors 
Other exposures to the investigational product under study may occur in clinical trial settings, 
such as medication errors.
Safety Event
Recorded on the CRF
Reported on the CT SAE 
Report Form to Pfizer 
Safety Within 24 Hours of 
Awareness
Medication errors
All (regardless of whether 
associated with an AE)
Only if associated with an 
SAE
8.4.4.1. Medication Errors
Medication errors may result from the administration or consumption of the investigational 
product by the wrong subject, or at the wrong time, or at the wrong dosage strength. 
Medication errors include:

Medication errors involving subject exposure to the investigational product;

Potential medication errors or uses outside of what is foreseen in the protocol that do 
or do not involve the participating subject;

Refer to Section 5.3 for examples of medication errors related to compliance with 
investigational product.

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Such medication errors occurring to a study participant are to be captured on the medication 
error page of the CRF, which is a specific version of the AE page.
In the event of a medication dosing error, the sponsor should be notified immediately.
Whether or not the medication error is accompanied by an AE, as determined by the 
investigator, the medication error is recorded on the medication error page of the CRF and, if 
applicable, any associated AE(s), serious and non-serious, are recorded on an AE page of the 
CRF.
Medication errors should be reported to Pfizer Safety within 24 hours on a CT SAE Report 
Form only when associated with an SAE.
9. DATA ANALYSIS/STATISTICAL METHODS
Detailed methodology for summary and statistical analyses of the data collected in this study 
is outlined here and further detailed in a statistical analysis plan (SAP), which will be 
maintained by the sponsor.  The SAP may modify what is outlined in the protocol where 
appropriate; however, any major modifications of the co-primary endpoint definitions or their 
analyses will also be reflected in a protocol amendment.
9.1. Sample Size Determination
Sample size for the study was based on the co-primary endpoints.  A total sample of 
375 subjects with 150 subjects randomized to PF-04965842 200 mg QD, 150 subjects 
randomized to PF-04965842 100 mg QD and 75 subjects randomized to placebo
(2:2:1 randomization) would provide at least 95% power to detect a difference in IGA 
response rate of at least 20% between PF-04965842 200 mg QD (or PF-04965842 
100 mg QD) and placebo, assuming the placebo response rate is 6% at Week 12.  
Furthermore, this will also provide at least 99% power to detect a difference in EASI-75 
response rate of at least 30% between PF-04965842 200 mg QD (or PF-04965842 
100 mg QD) and placebo, assuming the placebo response rate is 15% at Week 12.
The Type-I error for testing each individual co-primary endpoint was fixed at 5%.  Since 
both endpoints are co-primary, the study will meet its primary endpoint only if both 
hypotheses (corresponding to each co-primary endpoint) are rejected.  Therefore, the Type-I 
error rate remains controlled at 5% for testing the primary endpoint.  The power to reject 
both hypotheses when a true difference exists (alternative hypothesis is true) could be at least 
94% depending on the correlation between the endpoints.
9.2. Efficacy Analysis
9.2.1. Analysis Sets 
The primary analysis population for efficacy data will be the Full Analysis Set (FAS) defined 
as all randomized subjects receiving at least one dose of study medication.  The primary 
efficacy endpoint and the key secondary efficacy endpoints will also be analyzed for the 
Per-Protocol Analysis Set (PPAS) defined as a subset of FAS who had no major protocol 
violations.  The subjects excluded from the PPAS will be determined and documented before 

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the study is un-blinded.  For all analyses, baseline value will be based on observations 
collected pre-dose.
9.2.2. Testing Procedure for Multiple Comparisons
There are five key hypotheses to be tested for each of the two PF-04965842 doses 
(200 mg QD and 100 mg QD) versus placebo, for the co-primary endpoints and two key 
secondary endpoints.  The familywise Type-I error rate will be strongly controlled at 
5% using a sequential, Bonferroni-based iterative multiple testing procedure. 
The procedure will first test the co-primary endpoints (IGA and EASI75 at Week 12 for 
200 mg QD vs placebo) at the 5% level.  If this hypothesis is not rejected, then no further 
testing will be conducted.  If this hypothesis is rejected, then testing may continue on two 
paths:

The hypothesis for severity of pruritus (200 mg QD vs placebo at Week 2) will be 
tested at the 2.5% level.  If this hypothesis is rejected, then the unused alpha level 
of 2.5% will be passed on to the testing for the key secondary endpoints and the co-
primary endpoints for 100 mg QD vs placebo, in the order specified in Sequence A at 
a 5% significance level (see figure below).  Testing stops at any point where a 
hypothesis cannot be rejected.

If the hypothesis for severity of pruritus (200 mg QD vs placebo at Week 2) is not 
rejected at the 2.5% level, then the hypotheses for the key secondary endpoints and 
the co-primary endpoints for 100 mg QD vs placebo, in the order specified in 
Sequence A will be tested at a 2.5% significance level (see figure below). If all 
hypotheses in this sequence are rejected, then the unused alpha level of 2.5% will be 
passed on to the testing of the hypothesis for severity of pruritus (200 mg QD vs 
placebo) at Week 2 at the 5% level.

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Figure 2.
Schematic for Multiple Testing Procedure
The figure above illustrates the procedure showing the sequence of the tests.  
Hypotheses for all other endpoints not described here are to be tested at the 5% level, without 
making adjustments for multiple comparisons.
9.2.3. Analysis of the Primary Endpoints 
The co-primary endpoints will be analyzed using the (Cochran-Mantel-Haenszel) test 
adjusted by randomization strata (baseline disease severity and age) and both must achieve 
statistical significance to meet the primary objective.  The difference between each active 
group and the placebo group in the proportion of subjects achieving IGA response (similarly 
for EASI75) along with its 95% confidence interval (using the normal approximation for the 
difference in binomial proportions) will be reported.  If a subject withdraws from the study, 
then this subject will be counted as non-responder for endpoints after withdrawal.  Additional 
secondary analyses will utilize Missing at Random and Not at Random approaches (eg, 
Longitudinal Mixed models and jump to reference analyses).
9.2.4. Analysis of Secondary Endpoints
The key secondary endpoints which are expressed as proportions such as EASI50, EASI90 
and the proportion of subjects achieving a 4-point improvement from baseline in the pruritus 
NRS measure will be analyzed using the same method as the for co-primary endpoints.  This 

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would also apply to any other binary endpoint in the study.  Endpoints which are continuous 
will be analyzed as described below. 
For continuous endpoints, such as percent change from baseline in the EASI total score, a 
mixed-effect model with repeated measures (MMRM) will be used.  This model will include 
the factors (fixed effects) for treatment group, randomization strata (age group, disease 
severity), visit, treatment-by-visit interaction, and relevant baseline value.  Within the 
framework of MMRM, the treatment difference will be tested at the pre-specified primary 
time point, Week12, as well as at the other time points by time point-specific contrasts from 
the MMRM model. 
Continuous endpoints such asthe change from baseline i
 
 
 
  For binary 
endpoints such as the SCORAD50 or SCORAD75 or the proportion of subjects with PtGA of 
AD of clear (0) or almost clear (1) and 2point improvement from baseline over 12weeks, 
the same method as used for the binary endpoints in Section 9.2.3will be employed.  All 
secondary endpoints except the key secondary endpoints will be evaluated at the 5% level of 
significance, without adjustments for multiple comparisons.
9.3.Safety Analysis
The safety data will be summarized in accordance with Pfizer Data Standards.  All subjects 
who receive investigational product (safety population) will be included in the safety 
analyses.  All safety data will be summarized descriptively through appropriate data 
tabulations, descriptive statistics, categorical summaries, and graphical presentations.  Safety 
endpoints for the study include:
Treatment-emergent AEs and SAEs;
Withdrawals from active treatment due to AEs;
Serious infections, defined as any infection (viral, bacterial, and fungal) requiring 
hospitalization or parenteral antimicrobials;
Safety laboratory tests (eg, hematology [including coagulation panel], chemistry and 
lipid profiles);
Vital signs;
ECG parameters if applicable.
Change from baseline on laboratory data and vital signs will be additionally summarized.
Subject listings will also be produced for these safety endpoints.
CCI

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9.4. Analysis of Pharmacokinetic Endpoints 
Population PK data for PF-04965842 will be summarized through appropriate data 
tabulations, descriptive statistics, and graphical presentation.  A population PK model will be 
developed for the purpose of estimating PK parameters.  Additional details of the 
methodology will be captured in a separate modeling plan and the results will also be 
reported separately.
9.5. External Data Monitoring Committee 
This study will use an external data monitoring committee (E-DMC).  The E-DMC will be 
responsible for ongoing monitoring of the efficacy, safety and PKs of subjects in the study 
according to the charter.  The recommendations made by the E-DMC to alter the conduct of 
the study will be forwarded to Pfizer for final decision.  Pfizer will forward such decisions, 
which may include summaries of aggregate analyses of endpoint events and of safety data 
that are not endpoints, to regulatory authorities, as appropriate.  Composition of the E-DMC 
and processes under which the E-DMC operates will be documented in the E-DMC charter.
9.6. Safety Adjudication Committees
To help assess the specific, complex safety events related to malignancies, cardiovascular 
events, and opportunistic infection (including eczema herpeticum and other infections of 
special interest) in this study, Safety Adjudication Committees, consisting of clinical experts 
in each of the relevant clinical areas, will be set up to harmonize and standardize 
assessments.  In order to allow for an unbiased safety assessment, the members of these 
committees will be blinded to treatment assignment.  Further information about the Safety 
Adjudication Committees can be found in their respective charters, including a specific 
description of the scope of their responsibilities, a plan where communication timelines are 
defined, and the exact process and definitions used by each committee to adjudicate the 
safety events that they will adjudicate.  Other safety events for adjudication may be identified 
and included in the remit of the Safety Adjudication Committees as appropriate.
10. QUALITY CONTROL AND QUALITY ASSURANCE
Pfizer or its agent will conduct periodic monitoring visits during study conduct to ensure that 
the protocol and Good Clinical Practices (GCPs) are being followed.  The monitors may 
review source documents to confirm that the data recorded on CRFs are accurate.  The 
investigator and institution will allow Pfizer monitors/auditors or its agents and appropriate 
regulatory authorities direct access to source documents to perform this verification.  This 
verification may also occur after study completion.
During study conduct and/or after study completion, the investigator site may be subject to 
review by the IRB/EC, and/or to quality assurance audits performed by Pfizer, or companies 
working with or on behalf of Pfizer, and/or to inspection by appropriate regulatory 
authorities.

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The investigator(s) will notify Pfizer or its agents immediately of any regulatory inspection 
notification in relation to the study.  Furthermore, the investigator will cooperate with Pfizer 
or its agents to prepare the investigator site for the inspection and will allow Pfizer or its 
agent, whenever feasible, to be present during the inspection.  The investigator site and 
investigator will promptly resolve any discrepancies that are identified between the study 
data and the subject's medical records.  The investigator will promptly provide copies of the 
inspection findings to Pfizer or its agent.  Before response submission to the regulatory 
authorities, the investigator will provide Pfizer or its agents with an opportunity to review
and comment on responses to any such findings.
It is important that the investigator(s) and their relevant personnel are available during the 
monitoring visits and possible audits or inspections and that sufficient time is devoted to the 
process.
11. DATA HANDLING AND RECORD KEEPING
11.1. Case Report Forms/Electronic Data Record
As used in this protocol, the term CRF should be understood to refer to either a paper form or 
an electronic data record or both, depending on the data collection method used in this study.
A CRF is required and should be completed for each included subject.  The completed 
original CRFs are the sole property of Pfizer and should not be made available in any form to 
third parties, except for authorized representatives of Pfizer or appropriate regulatory 
authorities, without written permission from Pfizer.
The investigator has ultimate responsibility for the collection and reporting of all clinical, 
safety, and laboratory data entered on the CRFs and any other data collection forms (source 
documents) and ensuring that they are accurate, authentic/original, attributable, complete, 
consistent, legible, timely (contemporaneous), enduring, and available when required.  The 
CRFs must be signed by the investigator or by an authorized staff member to attest that the 
data contained on the CRFs are true.  Any corrections to entries made in the CRFs or source 
documents must be dated, initialed, and explained (if necessary) and should not obscure the 
original entry. 
In most cases, the source documents are the hospital or the physician subject chart.  In these 
cases, data collected on the CRFs must match the data in those charts. 
In some cases, the CRF may also serve as the source document.  In these cases, a document 
should be available at the investigator site and at Pfizer that clearly identifies those data that 
will be recorded on the CRF, and for which the CRF will stand as the source document.
11.2. Record Retention
To enable evaluations and/or inspections/audits from regulatory authorities or Pfizer, the 
investigator agrees to keep records, including the identity of all participating subjects 
(sufficient information to link records, eg, CRFs and hospital records), all original signed 
informed consent/assent documents, copies of all CRFs, safety reporting forms, source 

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documents, and detailed records of treatment disposition, and adequate documentation of 
relevant correspondence (eg, letters, meeting minutes, and telephone call reports).  The 
records should be retained by the investigator according to the ICH guidelines, according to 
local regulations, or as specified in the clinical study agreement (CSA), whichever is longer.
If the investigator becomes unable for any reason to continue to retain study records for the 
required period (eg, retirement, relocation), Pfizer should be prospectively notified.  The 
study records must be transferred to a designee acceptable to Pfizer, such as another 
investigator, another institution, or an independent third party arranged by Pfizer. 
Investigator records must be kept for a minimum of 15 years after completion or 
discontinuation of the study or for longer if required by applicable local regulations.
The investigator must obtain Pfizer's written permission before disposing of any records, 
even if retention requirements have been met.
12. ETHICS
12.1. Institutional Review Board/Ethics Committee
It is the responsibility of the investigator to have prospective approval of the study protocol, 
protocol amendments, informed consent/assent documents, and other relevant documents, 
eg, recruitment advertisements, if applicable, from the IRB/EC.  All correspondence with the 
IRB/EC should be retained in the investigator file.  Copies of IRB/EC approvals should be 
forwarded to Pfizer.
The only circumstance in which an amendment may be initiated prior to IRB/EC approval is 
where the change is necessary to eliminate apparent immediate hazards to the subjects.  In 
that event, the investigator must notify the IRB/EC and Pfizer in writing immediately after 
the implementation.
12.2. Ethical Conduct of the Study
The study will be conducted in accordance with the protocol, legal and regulatory 
requirements, and the general principles set forth in the International Ethical Guidelines for 
Biomedical Research Involving Human Subjects (Council for International Organizations of 
Medical Sciences 2002), ICH Guideline for Good Clinical Practice, and the Declaration of 
Helsinki.
12.3. Subject Information and Consent
All parties will ensure protection of subject personal data and will not include subject names 
or other identifiable data in any reports, publications, or other disclosures, except where 
required by law. 
When study data are compiled for transfer to Pfizer and other authorized parties, subject 
names, addresses, and other identifiable data will be replaced by numerical codes based on a 
numbering system provided by Pfizer in order to de-identify study subjects.  The investigator 
site will maintain a confidential list of subjects who participated in the study, linking each 

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subject’s numerical code to his or her actual identity.  In case of data transfer, Pfizer will 
maintain high standards of confidentiality and protection of subjects’ personal data consistent 
with applicable privacy laws.
The informed consent/assent documents and any subject recruitment materials must be in 
compliance with ICH GCP, local regulatory requirements, and legal requirements, including 
applicable privacy laws.
The informed consent/assent documents used during the informed consent process and any 
subject recruitment materials must be reviewed and approved by Pfizer, approved by the 
IRB/EC before use, and available for inspection.
The investigator must ensure that each study subject, or his or her parent(s)/legal guardian if 
a minor, is fully informed about the nature and objectives of the study and possible risks 
associated with participation. 
Whenever consent is obtained from a subject’s parent(s)/legal guardian, the subject’s assent 
(affirmative agreement) must subsequently be obtained when the subject has the capacity to 
provide assent, as determined by the IRB/EC.  If the investigator determines that a subject’s 
decisional capacity is so limited he/she cannot reasonably be consulted, then, as permitted by 
the IRB/EC and consistent with local regulatory and legal requirements, the subject’s assent 
may be waived with source documentation of the reason assent was not obtained.  If the 
study subject does not provide his or her own consent, the source documents must record 
why the subject did not provide consent (eg, minor, decisionally impaired adult), how the 
investigator determined that the person signing the consent was the subject’s parent(s)/legal 
guardian, the consent signer’s relationship to the study subject (eg, parent, spouse), and that 
the subject’s assent was obtained or waived.  If assent is obtained verbally, it must be 
documented in the source documents.
If the study includes minor subjects who reach the age of majority during the study, as 
recognized under local law, they must reconsent as adults to remain in the study.  If the 
enrollment of emancipated minors is permitted by the study age criteria, the IRB/EC, and 
local law, they must provide documentation of legal status to give consent without the 
permission of a parent or legal guardian. 
The investigator, or a person designated by the investigator, will obtain written informed 
consent from each subject or the subject's parent(s)/legal guardian and the subject’s assent, 
when applicable, before any study-specific activity is performed.  The investigator will retain 
the original of each subject's signed consent/assent document.
12.4. Reporting of Safety Issues and Serious Breaches of the Protocol or ICH GCP
In the event of any prohibition or restriction imposed (ie, clinical hold) by an applicable 
regulatory authority in any area of the world, or if the investigator is aware of any new 
information that might influence the evaluation of the benefits and risks of the investigational 
product, Pfizer should be informed immediately. 

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In addition, the investigator will inform Pfizer immediately of any urgent safety measures 
taken by the investigator to protect the study subjects against any immediate hazard, and of 
any serious breaches of this protocol or of ICH GCP that the investigator becomes aware of.
13. DEFINITION OF END OF TRIAL
13.1. End of Trial in All Participating Countries
End of trial in all countries is defined as the last subject last visit (LSLV).
14. SPONSOR DISCONTINUATION CRITERIA
Premature termination of this study may occur because of a regulatory authority decision, 
change in opinion of the IRB/EC, or investigational product safety problems, or at the 
discretion of Pfizer.  In addition, Pfizer retains the right to discontinue development of 
PF-04965842 at any time.
If a study is prematurely terminated, Pfizer will promptly notify the investigator.  After 
notification, the investigator must contact all participating subjects and the hospital pharmacy 
(if applicable) within 7 days.  As directed by Pfizer, all study materials must be collected and 
all CRFs completed to the greatest extent possible.
15. PUBLICATION OF STUDY RESULTS
15.1. Communication of Results by Pfizer
Pfizer fulfills its commitment to publicly disclose clinical trial results through posting the 
results of studies on www.clinicaltrials.gov (ClinicalTrials.gov), the European Clinical Trials 
Database (EudraCT), and/or www.pfizer.com, and other public registries in accordance with 
applicable local laws/regulations. 
In all cases, study results are reported by Pfizer in an objective, accurate, balanced, and 
complete manner and are reported regardless of the outcome of the study or the country in 
which the study was conducted.
www.clinicaltrials.gov
Pfizer posts clinical trial US Basic Results on www.clinicaltrials.gov for Pfizer-sponsored 
interventional studies (conducted in patients) that evaluate the safety and/or efficacy of a 
Pfizer product, regardless of the geographical location in which the study is conducted.  US 
Basic Results are submitted for posting within 1 year of the primary completion date (PCD) 
for studies in adult populations or within 6 months of the PCD for studies in pediatric 
populations.
PCD is defined as the date that the final subject was examined or received an intervention for 
the purposes of final collection of data for the primary outcome, whether the clinical study 
concluded according to the pre-specified protocol or was terminated.

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EudraCT
Pfizer posts European Union (EU) Basic Results on EudraCT for all Pfizer-sponsored 
interventional studies that are in scope of EU requirements.  EU Basic Results are submitted 
for posting within 1 year of the PCD for studies in adult populations or within 6 months of 
the PCD for studies in pediatric populations.
www.pfizer.com
Pfizer posts Public Disclosure Synopses (clinical study report synopses in which any data 
that could be used to identify individual patients has been removed) on www.pfizer.com for 
Pfizer-sponsored interventional studies at the same time the US Basic Results document is 
posted to www.clinicaltrials.gov.
15.2. Publications by Investigators
Pfizer supports the exercise of academic freedom and has no objection to publication by the 
principal investigator (PI) of the results of the study based on information collected or 
generated by the PI, whether or not the results are favorable to the Pfizer product.  However, 
to ensure against inadvertent disclosure of confidential information or unprotected 
inventions, the investigator will provide Pfizer an opportunity to review any proposed 
publication or other type of disclosure of the results of the study (collectively, “publication”) 
before it is submitted or otherwise disclosed.
The investigator will provide any publication to Pfizer at least 30 days before it is submitted 
for publication or otherwise disclosed.  If any patent action is required to protect intellectual 
property rights, the investigator agrees to delay the disclosure for a period not to exceed an 
additional 60 days.
The investigator will, on request, remove any previously undisclosed confidential 
information before disclosure, except for any study- or Pfizer product-related information 
necessary to the appropriate scientific presentation or understanding of the study results.
If the study is part of a multicenter study, the investigator agrees that the first publication is 
to be a joint publication covering all investigator sites, and that any subsequent publications 
by the PI will reference that primary publication.  However, if a joint manuscript has not 
been submitted for publication within 12 months of completion or termination of the study at 
all participating sites, the investigator is free to publish separately, subject to the other 
requirements of this section.
For all publications relating to the study, the institution will comply with recognized ethical 
standards concerning publications and authorship, including Section II - “Ethical 
Considerations in the Conduct and Reporting of Research” of the Uniform Requirements for 
Manuscripts Submitted to Biomedical Journals, http://www.icmje.org/index.html#authorship, 
established by the International Committee of Medical Journal Editors.

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Publication of study results is also provided for in the CSA between Pfizer and the 
institution.  In this section entitled Publications by Investigators, the defined terms shall have 
the meanings given to them in the CSA.
If there is any conflict between the CSA and any attachments to it, the terms of the CSA 
control.  If there is any conflict between this protocol and the CSA, this protocol will control 
as to any issue regarding treatment of study subjects, and the CSA will control as to all other 
issues.

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Yosipovitch G, Reaney M, Mastey V, et al. Validation of the peak pruritus numerical 
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Lai J, Cella D, Holm S, et al, Measuring Fatigue for Children with Cancer: 
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Appendix1.Abbreviations 
This following is a list of abbreviations that may be used in the protocol. 
Abbreviation
Term
AD
atopic dermatitis
AE
adverse event
ALT
alanine aminotransferase
AST
aspartate aminotransferase
ATP
adenosine triphosphate
AUC
Area under the curve
AUCinf
area under the curve from time zero extrapolated to infinity
AUClast
area under the curve from time zero to last quantifiable
AUCtau
area under the curve over dosing interval tau
BBS
Biospecimen Banking System
BCG
Bacille Calmette Guérin
BID
twice a day
BP
blood pressure
BSA
body surface area
Cmax
maximum concentration 
CD
cluster of differentiation
CFB
change from baseline
CI
confidence interval
CL/F
clearance/fraction of dose absorbed
CO2
carbon dioxide
CK
creatine kinase
CRF
case report form
CSA
clinical study agreement
CsA
cyclosporineA
CS
clinically significant
CSF
cerebrospinal fluid
CSR
clinical study report
C-SSRS
Columbia Suicide Severity Rating Scale
CT
clinical trial
CTA
clinical trial application
CTCAE
Common Terminology Criteria for Adverse Events
CV
Coefficient of variation
DILI
drug-induced liver injury
DMC
data monitoring committee
DNA
deoxyribonucleic acid
DU
dispensable unit
EASI
Eczema Area and Severity Index
CCI
CCI

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Abbreviation
Term
EASI-75
Eczema Area and Severity Index 75% improvement from 
baseline
EBV
Epstein Barr virus
EC
ethics committee
ECG
electrocardiogram
e-Diary
electronic diary
E-DMC
external data monitoringcommittee 
EDP
exposure during pregnancy
ELISA
Enzyme-Linked Immunosorbent Assay
EMA
European Medicines Agency
EOS
end of study
EOT
end of treatment
EPO
erythropoietin
ePRO
electronic Patient Reported Outcome 
ET
early termination 
EU
European Union
EudraCT
European Clinical Trials Database
FACs
fluorescence-activated cell sorting
FAS
full analysis set
FDA
Food and Drug Administration 
FSH
follicle-stimulating hormone
GCP
Good Clinical Practice
GGT
Gamma-glutamyl transferase
GM-CSF
granulocyte-macrophage colony-stimulating factor
HBsAb
hepatitis B surface antibody
HBsAg
hepatitis B surface antigen
HBcAb 
hepatitis B core antibody
HBV
hepatitis B virus
HBV DNA
hepatitis B virus deoxyribonucleic acid
HCV
hepatitis C virus
HCVAb 
hepatitis C antibody
HCV RNA
hepatitis C viral ribonucleic acid
HDL
high-density lipoprotein 
HEENT
head, eyes, ears, nose and throat
HIV
human immunodeficiency virus
HRQL
health-related quality of life
hsCRP
high-sensitivity C-reactive protein
HSV
herpes simplex virus
HTA
health technologies assessment 
CCI
CCI
CCI

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Abbreviation
Term
IB
Investigator’s Brochure
ICH
International Conference on Harmonisation
ID
identification
IFN
interferon
IFN-
interferon-alpha
IFN-
interferon-gamma
IGA
Investigator’s Global Assessment
IgE 
Immunoglobulin E
IgG
immunoglobulin G
IIV
inter individual variability
IL
interleukin
IND
investigational new drug application
INR
international normalized ratio
IP
investigational product
IRB
institutional review board
IRC
internal review committee
IRT
interactive response technology
IUD
intrauterine device
IWR
interactive web response
JAK
Janus kinase
JAK1
Janus kinase 1
K2EDTA
dipotassium ethylenediaminetetraacetic acid
LDL
low-density lipoprotein
LFT
liver function test
LLQ
lower limit of quantification
LSLV
last subject last visit 
LTE
long-term extension
MAA
marketing authorisation application
MCH
mean corpuscular hemoglobin
MCHC
mean corpuscular hemoglobin concentration
MCV
mean corpuscular volume
MMRM
mixed-effect model with repeated measures
MnB
meningitidis serogroup B
MRI
magnetic resonance imaging
MTX
methotrexate
N/A
not applicable
NB-UVB
narrowband ultraviolet B light
NRS 
numerical rating scale
PCD
primary completion date
PCP
primary care physician
PD
Pharmacodynamics
PEER Study
Pediatric Eczema Elective Registry Study
 
CCI

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Abbreviation
Term
PFS
prefilled syringe
PGIC
Patient Global Impression of Change
PGIS
Patient Global Impression of Severity
PGx
Pharmacogenomics
PHQ8
Patient Health Questionnaire -8 items
PI
principal investigator
PK
Pharmacokinetics
POC
proof of concept
PPAS
per-protocol analysis set
PPD
purified protein derivative test
PT
prothrombin time
 
QD
once daily
QFT-G
QuantiFERON-TB Gold
QT
Q wave interval
QTc
corrected Q wave interval
QTcF
Fridericia corrected Q wave interval
Rac
accumulation ratio 
RBC
red blood cell
RNA
ribonucleic acid
SAE
serious adverse event
SAP
statistical analysis plan
SBQ-R
Suicide Behaviors Questionnaire-Revised
SCORAD 
Scoring Atopic Dermatitis
SOC
system organ class
SOP
standard operating procedure
SRSD
single reference safety document
STAT
signal transducers and activators of transcription
SUSAR
suspected unexpected serious adverse reaction
t
½
Half-life
Tmax
time to maximum absorption
TARC
thymus and activation regulated chemokine
TB
tuberculosis
TBili
total bilirubin
TdP
Torsade de Pointes
TH1
type 1 helper T cell
TH2
type 2 helper T cell
TYK2
tyrosine kinase 2
CCI
CCI
CCI
CCI
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Abbreviation
Term
ULN
upper limit of normal
US
United States
UVA
ultraviolet A light
UVB
ultraviolet B light
VAS
visual analog scale
V/F
volume of distribution/fraction absorbed
VHP
Voluntary Harmonisation Procedure
VZV 
varicella zoster virus
WBC
white blood cell
WONCBP 
women of non-childbearing potential
 
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Appendix 2. Diagnostic Criteria for Atopic Dermatitis
Per Inclusion Criterion 3, a subject is to have a clinical diagnosis of atopic dermatitis 
according to the criteria of Hanifin and Rajka.16
Hanifin and Rajka’s Diagnostic Criteria for Atopic Dermatitis
Must have three or more basic features described below:
Pruritus
Typical morphology and distribution:
Flexural lichenification in adults
Facial and extensor eruptions in infants and children
Chronic or chronically-relapsing dermatitis
Personal or family history of atopy (asthma, allergic rhinitis, atopic dermatitis)
Must have three or more following minor features:
Xerosis
Ichthyosis/palmar hyperlinearity, keratosis pilaris
Immediate (type 1) skin test reaction
Elevated serum IgE
Early age of onset
Tendency toward cutaneous infections (esp. staph. aureus and herpes simplex), impaired 
cell-mediated immunity
Tendency toward non-specific hand or foot dermatitis
Nipple eczema
Cheilitis
Recurrent conjunctivitis
Dennie-Morgan infraorbital fold
Keratoconus
Anterior subcapsular cataracts
Orbital darkening
Facial pallor, facial erythema
Pityriasis alba
Anterior neck folds
Itch when sweating
Intolerance to wool and lipid solvents
Periofollicular accentuation
Food intolerance
Course influenced by environmental and emotional factors
White dermographism, delayed blanch

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Appendix 3. Prohibited Concomitant Medications
CYP2C19 Inhibitors 
CYP2C19 Inducers
Amitriptyline (Elavil)
Enzalutamide (Xtandi)
Clomipramine (Anafranil)
Rifampin
Fluconazole (Diflucan)
Fluvoxamine (Luvox)
Imipramine (Tofranil)
Ticlopidine (Ticlid)
Esomeprazole (Nexium)
Fluoxetine (Prozac)
Moclobemide
Omeprazole (Prilosec)
Voriconazole (Vfend)
CYP2C9 Inhibitors 
CYP2C9 Inducers
Fluconazole (Diflucan)
Carbamazepine (Tegretol)
Amiodarone (Cordarone)
Enzalutamide (Xtandi)
Fluvoxamine (Luvox)
Rifampin
Miconazole
Oxandrolone (Oxandrin)
Voriconazole (Vfend)

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Appendix 4. Guidelines for Monitoring and Discontinuation 
Monitoring Criteria 
The following laboratory abnormalities require prompt retesting:

Neutrophil counts <1000 neutrophils/mm3; confirmed promptly by repeat testing, 
ideally within 3-5 days; 

Lymphocyte count <500/mm3
; confirmed promptly by repeat testing, ideally within 
3-5 days;

Platelet counts <75,000 platelets/mm3; confirmed promptly by repeat testing, ideally 
within 3-5 days; 

Any single hemoglobin value <9.0 g/dL or one that drops 2 g/dL below baseline; 
confirmed promptly by repeat testing, ideally within 3-5 days; 

Any single AST and/or ALT elevation >3 times the upper limit of normal regardless 
of accompanying symptoms or the total Bilirubin should prompt repeat testing.  This 
should also prompt review of Section 8.4.2; additional investigations must be 
conducted.
Discontinuation Criteria
Subjects must be permanently discontinued from treatment if they meet any of the following 
criteria at any point in the study:

Marked prolongation of the QTcF interval to >500 ms or >60 ms change from 
screening ECG.
Note: any quoted lab value below must be confirmed by re-test, preferably within 48 hours.

Serious infection (see definition for Serious Adverse Events in Section 8.2.3).

Two sequential platelet counts <50,000/mm3.  If the subject has a platelet count 
<25,000/mm3, investigational product should be discontinued pending the 
confirmatory retest.  If the subject has a platelet count <50,000/mm3 and the 
confirmatory retest cannot be obtained within 48 hours, investigational product
should be discontinued pending the confirmatory retest. 

Any platelet count reduction thought to be associated with a bleeding event per the 
judgement of the investigator (or, if necessary/desired, following discussion with 
sponsor).

Two sequential neutrophil counts <500/mm3.

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
Two sequential lymphocyte counts <500/mm3.

Two sequential hemoglobin assessments <8.0 g/dL or a decrease of more than 
30% from baseline value (either criteria or both).
Any of the following:

Two sequential AST or ALT elevations >3 times the upper limit of normal with at 
least one Total Bilirubin value >2 times the upper limit of normal.

Two sequential AST or ALT elevations >3 times the upper limit of normal with an 
abnormal INR.

Two sequential AST or ALT elevations >3 times the upper limit of normal 
accompanied by symptoms consistent with hepatic injury.

Two sequential AST or ALT elevations >5 times the upper limit of normal, regardless 
of Total Bilirubin or accompanying symptoms.

Two sequential increases in serum creatinine that are >50% over the average of 
screening and baseline values AND an absolute increase in serum creatinine 
0.5 mg/dL.  At the time of study completion or discontinuation, if a patient should 
exhibit elevations in serum creatinine 33% above the average of screening and 
baseline values, they will be re-tested every 1 to 2 weeks until the serum creatinine 
elevation is fully reversed to within 10% of the average of screening and baseline 
values or has stabilized.

Other adverse event, per judgment of the investigator, requiring discontinuation from 
treatment (or, if necessary/desired, following discussion with sponsor).

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Appendix 5. Fitzpatrick Skin Type 

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Appendix 6. Pruritus Severity and Frequency (Pruritus NRS)
Severity of Pruritus
On a scale of 0 to 10, with 0 being “no itch” and 10 being “worst itch imaginable”, how 
would you rate your itch at the worst moment during the previous 24 hours? 
Frequency of Pruritus
Select the number that best describes frequency of itching due to Atopic Dermatitis over the 
past 24 hours (check one number only).
10
9
8
7
6
5
4
3
2
1
0
10
9
8
7
6
5
4
3
2
1
0
No 
itch
Worst 
itch
imaginable
10
9
8
7
6
5
4
3
2
1
0
10
9
8
7
6
5
4
3
2
1
0
Never /No 
itching
Always/constant 
itching

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Appendix 7. Night Time Itch Scale
Severity of Night Time Itch  
On a scale of 0 to 10, with 0 being “no itch” and 10 being “worst itch imaginable”, how 
would you rate your itch at the worst moment during your most recent night’s sleep?      
(select one number only)
□  □
□
□
□
□
□
□
□
□
□
0
1
2
3
4
5
6
7
8
9
10
No 
Worst itch 
itch 
imaginable 
Frequency of Night Time Itch
On a scale of 0 to 10, with 0 being “no itching” and 10 being “constant itching”, how would 
you rate the frequency of itching during your most recent night’s sleep (select one number 
only)
□  □
□
□
□
□
□
□
□
□
□
0
1
2
3
4
5
6
7
8
9
10
Never/No
Always/Constant 
itching
itching 

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AY Finlay, GK Khan, April 1992, This must not be copied without the permission of the authors.
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WPAI:AD v2.0 (US English)
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Appendix 17. C-SSRS – Columbia Suicide Severity Rating Scale

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Appendix 18. SBQ-R – Suicide Behaviors Questionnaire – Revised

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Appendix 19. Patient Health Questionnaire – 8 items