Study to Investigate Efficacy and Safety of PF-04965842 in Subjects Aged 12 Years and Over With Moderate to Severe Atopic Dermatitis With the Option of Rescue Treatment in Flaring Subjects

Study Overview
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Brief Summary
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B7451014 is a Phase 3 study to investigate PF-04965842 in patients aged 12 years and over with a minimum body weight of 40 kg who have moderate to severe atopic dermatitis. Subjects responding well to an initial open-label 12 week treatment of PF-04965842 (200 mg) taken orally once daily (QD) will be identified and randomized in a double-blind manner to receive 200 mg QD PF-04965842, 100 mg QD PF-04965842, or QD placebo. Efficacy and safety of 2 doses of PF-04965842 will be evaluated relative to placebo over 40 weeks. Subjects experiencing significant worsening of their symptoms, i.e., protocol-defined flare, enter 12 weeks rescue treatment and receive 200 mg PF-04965842 together with a marketed topical medicine. Eligible patients will have the option to enter a long-term extension study after completing the initial 12 week treatment, the 12 week rescue treatment, and the 40 week blinded treatment.

Detailed Description
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Responder criteria for randomization at week 12 are defined as a) achieving an IGA of clear (0) or almost clear (1) (on a 5 point scale), b) a reduction from IGA baseline of 2 or more points, and c) reaching an EASI-75 response compared to baseline. Flare requiring rescue treatment is defined as a loss of at least 50% of the EASI response at Week 12 and an IGA score of 2 or higher.

Official Title
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A PHASE 3 RANDOMIZED WITHDRAWAL, DOUBLE-BLIND, PLACEBO-CONTROLLED, MULTI-CENTER STUDY INVESTIGATING THE EFFICACY AND SAFETY OF PF-04965842 IN SUBJECTS AGED 12 YEARS AND OVER, WITH MODERATE TO SEVERE ATOPIC DERMATITIS WITH THE OPTION OF RESCUE TREATMENT IN FLARING SUBJECTS

Conditions
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Eczema, Dermatitis, Dermatitis, Atopic, Skin Diseases, Skin Diseases, Genetic, Genetic Diseases, Inborn, Skin Diseases, Eczematous, Hypersensitivity, Hypersensitivity, Immediate, Immune System Diseases

Intervention / Treatment
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* Drug: PF-04965842 100 mg
* Drug: PF-04965842 200 mg
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 12 years of age or older with a minimum body weight of 40 kg Diagnosis of atopic dermatitis (AD) for at least 1 year and current status of moderate to severe disease (>= the following scores: BSA10%, IGA 3, EASI 16, Pruritus NRS 4) Recent history of inadequate response or inability to tolerate topical AD treatments or require systemic treatments for AD control Exclusion Criteria: Unwilling to discontinue current AD medications prior to the study or require treatment with prohibited medications during the study Prior treatment with JAK inhibitors Other active nonAD inflammatory skin diseases or conditions affecting skin Medical history including thrombocytopenia, coagulopathy or platelet dysfunction, Q wave interval abnormalities, current or history of certain infections, cancer, lymphoproliferative disorders and other medical conditions at the discretion of the investigator Pregnant or breastfeeding women, or women of childbearing potential who are unwilling to use contraception

Ages Eligible for Study
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Minimum Age: 12 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: PF-04965842 100 mg QD<br>Double-blind randomized treatment following open label run-in period. | Drug: PF-04965842 100 mg<br>* PF-04965842 100 mg, administered as two tablets to be taken orally once daily for 40 weeks<br>* Other names: Abrocitinib;|
| Experimental: PF-04965842 200 mg QD<br>Double-blind randomized treatment following open label run-in period. | Drug: PF-04965842 200 mg<br>* PF-04965842 200 mg, administered as two tablets to be taken orally once daily for 40 weeks<br>* Other names: Abrocitinib;|
| Placebo Comparator: Placebo QD<br>Double-blind randomized treatment following open label run-in period. | Drug: Placebo<br>* Placebo, administered as two tablets to be taken orally once daily for 40 weeks<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Participants With Loss of Response: Double-blind (DB) Period | Percentage of participants with loss of response requiring rescue treatment during double blind period was determined. Loss of response denoted as flare and was define as a loss of at least 50% of EASI total score at Week 12 and with an IGA score of 2 or higher. EASI quantifies severity of participant's atopic dermatitis (AD) based on both severity of lesion clinical signs and % of body surface area (BSA) affected. EASI is a composite scoring by AD clinical evaluator of degree of erythema, induration/papulation, excoriation, and lichenification for each of 4 body regions. EASI total score range from 0.0 to 72.0, with higher scores representing greater severity of AD. IGA assesses severity of AD on 5-point scale (0 to 4, higher scores = more severity), reflecting global consideration of erythema, induration and scaling. Where, 0 = clear; 1 = almost clear; 2 = mild; 3 = moderate and 4 = severe. | From Day 1 of up to Week 40 of double blind period | 
| Time to Loss of Response: Double-blind Period | Time (in days) to loss of response based on achieving IGA >=2 was measured from date of first dose of randomized treatment until last dose of randomized treatment (if not entered rescue) or first day of rescue treatment (if entered rescue) and based on EASI, loss of at least 50% of EASI response at Week 12 and IGA score of 2 or higher. IGA assesses severity of AD on 5-point scale (0 to 4, higher scores=more severity), reflecting global consideration of erythema, induration and scaling with scores 0 = clear; 1 = almost clear; 2 = mild; 3 = moderate; 4 = severe. EASI quantifies severity of AD based on severity of lesion clinical signs and % of BSA affected. EASI composite score evaluates degree of erythema, induration/papulation, excoriation, and lichenification. | From date of first dose of randomized treatment until the last dose of randomized treatment (if not entered rescue) or first day of rescue treatment (if entered rescue) (maximum up to Week 40, visit window was extended +/- 45 Days due to COVID 19) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Time to First Loss of Response Based on Investigator's Global Assessment (IGA) Score of 2 or Higher: Double-blind Period | Time (in days) to loss of response based on achieving IGA >=2 (for the first time) as measured from date of first dose of randomized treatment until the last dose of randomized treatment (if not entered rescue) or first day of rescue treatment (if entered rescue). IGA assesses severity of AD on a 5-point scale (0 to 4, higher scores indicated more severity), reflecting global consideration of erythema, induration and scaling. Where, 0 = clear, AD is cleared; 1 = almost clear, AD not entirely cleared, light pink residual lesions; 2 = mild, AD with light red lesions; 3 = moderate, AD with red lesions; 4 = severe, AD with deep, dark red lesions. | From date of first dose of randomized treatment until the last dose of randomized treatment (if not entered rescue) or first day of rescue treatment (if entered rescue) (maximum up to Week 40, visit window +/- 7 Days) | 
| Percentage of Participants Achieving Investigator's Global Assessment (IGA) Response of Clear (0) or Almost Clear (1) and a Reduction of Greater Than or Equal to (>=) 2 Points From Baseline at Weeks 12, 16, 28, 40, and 52: Double-blind Period | IGA assessed severity of AD on a 5-point scale (0 to 4, higher scores indicated more severity), reflecting global consideration of erythema, induration and scaling. Where, 0 = clear, AD is cleared; 1 = almost clear, AD not entirely cleared, light pink residual lesions; 2 = mild, AD with light red lesions; 3 = moderate, AD with red lesions; 4 = severe, AD with deep dark red lesions. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percentage of Participants Achieving Eczema Area and Severity Index (EASI) Response >=50% Improvement From Baseline at Weeks 12, 16, 28, 40 and 52: Double-blind Period | EASI quantifies severity of participant's AD (excluded scalp, palms, soles) based on severity of AD clinical signs and % of BSA affected. Severity of clinical signs of AD (erythema [E], induration/papulation [I], excoriation [Ex] and lichenification [L]) was scored separately for each of 4 body regions (head and neck [h], upper limbs [u], trunk [t] [including axillae and groin] and lower limbs [l] [including buttocks]) on 4-point scale: 0 = absent; 1 = mild; 2 = moderate; 3 = severe. EASI area score was based upon % BSA with AD in body region: 0 (0%), 1 (>0 to <10%), 2 (10 to <30%), 3 (30 to <50%), 4 (50 to <70%), 5 (70 to <90%) and 6 (90 to 100%). Total EASI score = 0.1*Ah*(Eh+Ih+Exh+Lh) + 0.2*Au*(Eu+Iu+ExU+Lu) + 0.3*At*(Et+It+Ext+Lt) + 0.4*Al*(El+Il+Exl+Ll); where A = area score. Total EASI score ranged from 0.0 to 72.0, higher scores = greater severity of AD. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percentage of Participants Achieving Eczema Area and Severity Index (EASI) Response >=75% Improvement From Baseline at Weeks 12, 16, 28, 40 and 52: Double-blind Period | EASI quantifies severity of participant's AD (excluded scalp, palms, soles) based on severity of AD clinical signs and % of BSA affected. Severity of clinical signs of AD (erythema, induration/papulation, excoriation and lichenification) scored separately for each of 4 body regions (head and neck, upper limbs, trunk [including axillae and groin] and lower limbs [including buttocks]) on 4-point scale: 0 = absent; 1 = mild; 2 = moderate; 3 = severe. EASI area score was based upon % BSA with AD in body region: 0 (0%), 1 (>0 to <10%), 2 (10 to <30%), 3 (30 to <50%), 4 (50 to <70%), 5 (70 to <90%) and 6 (90 to 100%). Total EASI score = 0.1*Ah*(Eh+Ih+Exh+Lh) + 0.2*Au*(Eu+Iu+ExU+Lu) + 0.3*At*(Et+It+Ext+Lt) + 0.4*Al*(El+Il+Exl+Ll). Total EASI score ranged from 0.0 to 72.0, higher scores = greater severity of AD. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percentage of Participants Achieving Eczema Area and Severity Index (EASI) Response >=90% Improvement From Baseline at Weeks 12, 16, 28, 40 and 52: Double-blind Period | EASI quantifies severity of participant's AD (excluded scalp, palms, soles) based on severity of AD clinical signs and % of BSA affected. Severity of clinical signs of AD (erythema, induration/papulation, excoriation and lichenification) scored separately for each of 4 body regions (head and neck, upper limbs, trunk [including axillae and groin] and lower limbs [including buttocks]) on 4-point scale: 0 = absent; 1 = mild; 2 = moderate; 3 = severe. EASI area score was based upon % BSA with AD in body region: 0 (0%), 1 (>0 to <10%), 2 (10 to <30%), 3 (30 to <50%), 4 (50 to <70%), 5 (70 to <90%) and 6 (90 to 100%). Total EASI score = 0.1*Ah*(Eh+Ih+Exh+Lh) + 0.2*Au*(Eu+Iu+ExU+Lu) + 0.3*At*(Et+It+Ext+Lt) + 0.4*Al*(El+Il+Exl+Ll). Total EASI score ranged from 0.0 to 72.0, higher scores=greater severity of AD. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percentage of Participants Achieving Eczema Area and Severity Index (EASI) Response >=100% Improvement From Baseline at Weeks 12, 16, 28, 40 and 52: Double-blind Period | EASI quantifies severity of participant's AD (excluded scalp, palms, soles) based on severity of AD clinical signs and % of BSA affected. Severity of clinical signs of AD (erythema, induration/papulation, excoriation and lichenification) scored separately for each of 4 body regions (head and neck, upper limbs, trunk [including axillae and groin] and lower limbs [including buttocks]) on 4-point scale: 0= absent; 1= mild; 2= moderate; 3= severe. EASI area score was based upon % BSA with AD in body region: 0 (0%), 1 (>0 to <10%), 2 (10 to <30%), 3 (30 to <50%), 4 (50 to <70%), 5 (70 to <90%) and 6 (90 to 100%). Total EASI score =0.1*Ah*(Eh+Ih+Exh+Lh) + 0.2*Au*(Eu+Iu+ExU+Lu) + 0.3*At*(Et+It+Ext+Lt) + 0.4*Al*(El+Il+Exl+Ll). Total EASI score ranged from 0.0 to 72.0, higher scores=greater severity of AD. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percentage of Participants With Greater Than or Equal 4 Points Improvement in the Numerical Rating Scale (NRS) for Severity of Pruritus From Baseline at Weeks 12, 16, 28, 40 and 52: Double-blind Period | Participants were asked to assess their worst itching due to AD over the past 24 hours on an NRS scale ranged from 0 (no itch) to 10 (worst itch imaginable), where higher scores indicated worse disease status. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percent Change From Baseline in Body Surface Area (BSA) at Weeks 12, 16, 28, 40 and 52: Double-blind Period | 4 body regions evaluated: head and neck, upper limbs, trunk (including axillae, groin/genitals), lower limbs (including buttocks) excluding scalp, palms, soles. BSA calculated by handprint method. Number (No) of handprints (size of participant's hand with fingers in closed position) fitting in affected area of a body region was estimated. Maximum No of handprints were 10, 20, 30, 40 for head and neck, upper limbs, trunk, and lower limbs respectively. Surface area (SA) of body region equivalent to 1 handprint: 1 handprint=10% for head and neck, 5% for upper limbs, 3.33% for trunk and 2.5% for lower limbs. %Change BSA for a body region was calculated as=total No of handprints in a body region* %SA equivalent to 1 handprint. %BSA for an individual: arithmetic mean of %BSA of all 4 body regions, ranged from 0-100%, higher values=greater AD severity. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percent Change From Baseline in Scoring Atopic Dermatitis (SCORAD) Total Score at Weeks 12, 16, 28, 40 and 52: Double-blind Period | SCORAD: scoring index for AD combining extent (A), severity (B), subjective symptoms (C). A: rule of 9 used to calculate BSA affected by AD as % of whole BSA for each body region- head and neck 9%; upper limbs 9% each; lower limbs 18% each; anterior trunk 18%; back 18%; genitals 1%. Score of each body region added to determine A (0-100). B: severity of each sign (erythema; edema; oozing; excoriation; skin thickening; dryness) was assessed as none (0), mild (1), moderate (2), severe (3); severity scores added to give B (0-18). C: pruritus and sleep loss, each of these 2 were scored by participant/caregiver using VAS where, 0=no itch/no sleep loss and 10=worst imaginable itch/sleep loss, higher scores=worse symptoms. Scores for itch and sleep loss added to give 'C' (0-20). SCORAD calculated as: A/5+7*B/2+C; range (0-103); higher values=worse outcome. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Change From Baseline in Scoring Atopic Dermatitis (SCORAD) Visual Analogue Scale (VAS) of Itch and Sleep Loss at Weeks 12, 16, 28, 40 and 52: Double-blind Period | SCORAD: scoring index for AD combining extent (A), severity (B), subjective symptoms (C). A: rule of 9 used to calculate BSA affected by AD as % of whole BSA for each body region-head and neck 9%; upper limbs 9% each; lower limbs 18% each; anterior trunk 18%; back 18%; genitals 1%. Score of each body region added to determine A (0-100). B: severity of each sign (erythema; edema; oozing; excoriation; skin thickening; dryness) was assessed as none (0), mild (1), moderate (2), severe (3). Severity scores added to give B (0-18). C: pruritus and sleep loss, each were scored by participant/caregiver using VAS where, 0=no itch/no sleep loss and 10=worst imaginable itch/sleep loss, higher scores=worse symptoms. Scores for itch and sleep loss added to give 'C' (0-20). SCORAD calculated as: A/5+7*B/2+C; range (0-103); higher values=worse outcome. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percentage of Participants With >=50% Improvement From Baseline in Scoring Atopic Dermatitis (SCORAD) Response at Weeks 12, 16, 28, 40 and 52: Double-blind Period | SCORAD: scoring index for AD combining extent (A), severity (B), subjective symptoms (C). A: rule of 9 used to calculate BSA affected by AD as % of whole BSA for each body region- head and neck 9%; upper limbs 9% each; lower limbs 18% each; anterior trunk 18%; back 18%; genitals 1%. Score of each body region added to determine A (0-100). B: severity of each sign (erythema; edema; oozing; excoriation; skin thickening; dryness) was assessed as none (0), mild (1), moderate (2), severe (3). Severity scores added to give B (0-18). C: pruritus and sleep loss, each were scored by participant/caregiver using VAS where, 0=no itch/no sleep loss and 10=worst imaginable itch/sleep loss, higher scores=worse symptoms. Scores for itch and sleep loss added to give 'C' (0-20). SCORAD calculated as: A/5+7*B/2+C; range (0-103); higher values=worse outcome. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percentage of Participants With >=75% Improvement From Baseline in Scoring Atopic Dermatitis (SCORAD) Response at Weeks 12, 16, 28, 40 and 52: Double-blind Period | SCORAD: scoring index for AD combining extent (A), severity (B), subjective symptoms (C). A: rule of 9 used to calculate BSA affected by AD as % of whole BSA for each body region- head and neck 9%; upper limbs 9% each; lower limbs 18% each; anterior trunk 18%; back 18%; genitals 1%. Score of each body region added to determine A (0-100). B: severity of each sign (erythema; edema; oozing; excoriation; skin thickening; dryness) was assessed as none (0), mild (1), moderate (2), severe (3). Severity scores added to give B (0-18). C: pruritus and sleep loss, each were scored by participant/caregiver using VAS where, 0=no itch/no sleep loss and 10=worst imaginable itch/sleep loss, higher scores=worse symptoms. Scores for itch and sleep loss added to give 'C' (0-20). SCORAD calculated as: A/5+7*B/2+C; range (0-103); higher values=worse outcome. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Percentage of Participants Achieving IGA Response of Clear (0) or Almost Clear (1) and Greater Than or Equal to (>=) 2 Points Improvement From Rescue Baseline at Rescue Weeks 2, 4, 8 and 12: Rescue Period | IGA assessed severity of AD on a 5-point scale (0-4, higher scores indicated more severity), reflecting global consideration of erythema, induration and scaling. Where, 0=clear, AD is cleared; 1 = almost clear, AD not entirely cleared, light pink residual lesions; 2 = mild, AD with light red lesions; 3 = moderate, AD with red lesions; 4 = severe, AD with deep, dark red lesions. | Rescue Baseline: last observation collected between last dose of blinded treatment and Day 1 (first dose day) of rescue treatment, Rescue Weeks 2, 4, 8 and 12 | 
| Percent Change From Rescue Baseline in Total Eczema Area and Severity Index (EASI) Score at Rescue Weeks 2, 4, 8 and 12: Rescue Period | EASI quantifies severity of participant's AD (excluded scalp, palms, soles) based on severity of AD clinical signs and % of BSA affected. Severity of clinical signs of AD (erythema, induration/papulation, excoriation and lichenification) scored separately for each of 4 body regions (head and neck, upper limbs, trunk [including axillae and groin] and lower limbs [including buttocks]) on 4-point scale: 0= absent; 1= mild; 2= moderate; 3= severe. EASI area score was based upon % BSA with AD in body region: 0 (0%), 1 (>0 to <10%), 2 (10 to <30%), 3 (30 to <50%), 4 (50 to <70%), 5 (70 to <90%) and 6 (90 to 100%). Total EASI score =0.1*Ah*(Eh+Ih+Exh+Lh) + 0.2*Au*(Eu+Iu+ExU+Lu) + 0.3*At*(Et+It+Ext+Lt) + 0.4*Al*(El+Il+Exl+Ll). Total EASI score ranged from 0.0 to 72.0, higher scores=greater severity of AD. | Rescue Baseline: last observation collected between last dose of blinded treatment and Day 1 (first dose day) of rescue treatment, Rescue Weeks 2, 4, 8 and 12 | 
| Percentage of Participants Achieving Greater Than or Equal to 4 Points Improvement From Rescue Baseline in Peak Pruritus Numeric Rating Scale (PP-NRS) at Rescue Weeks 2, 4, 8 and 12: Rescue Period | Participants were asked to assess their worst itching due to AD over the past 24 hours on an NRS scale ranged from 0 (no itch) to 10 (worst itch imaginable), where higher scores indicated greater severity. | Rescue Baseline: last observation collected between last dose of blinded treatment and Day 1 (first dose day) of rescue treatment, Rescue Weeks 2, 4, 8 and 12 | 
| Percent Change From Rescue Baseline in Percent Body Surface Area (BSA) at Rescue Weeks 2, 4, 8 and 12: Rescue Period | 4 body regions were evaluated: head and neck, upper limbs, trunk (including axillae and groin/genitals) and lower limbs (including buttocks). Scalp, palms and soles were excluded. BSA was calculated using handprint method. Number of handprints (size of participant's hand with fingers in a closed position) fitting in affected area of a body region was estimated. Maximum number of handprints were 10 for head and neck, 20 for upper limbs, 30 for trunk and 40 for lower limbs. Surface area of body region equivalent to 1 handprint: 1 handprint was equal to 10% for head and neck, 5% for upper limbs, 3.33% for trunk and 2.5% for lower limbs. Overall % BSA for an individual % BSA of all 4 body regions, ranged from 0 to 100%, with higher values representing greater severity of AD. | Rescue Baseline: last observation collected between last dose of blinded treatment and Day 1 (first dose day) of rescue treatment, Rescue Weeks 2, 4, 8 and 12 | 
| Percent Change From Rescue Baseline in Scoring Atopic Dermatitis (SCORAD) Visual Analog Scale (VAS) Score of Itch and Sleep Loss at Rescue Weeks 2, 4, 8 and 12: Rescue Period | SCORAD: scoring index for AD combining extent (A), severity (B), subjective symptoms (C). A: rule of 9 used to calculate BSA affected by AD as % of whole BSA for each body region- head and neck 9%; upper limbs 9% each; lower limbs 18% each; anterior trunk 18%; back 18%; genitals 1%. Score of each body region added to determine A (0-100). B: severity of each sign (erythema; edema; oozing; excoriation; skin thickening; dryness) was assessed as none (0), mild (1), moderate (2), severe (3). Severity scores added to give B (0-18). C: pruritus and sleep loss, each were scored by participant/caregiver using VAS where, 0=no itch/no sleep loss and 10=worst imaginable itch/sleep loss, higher scores=worse symptoms. Scores for itch and sleep loss added to give 'C' (0-20). SCORAD calculated as: A/5+7*B/2+C; range (0-103); higher values=worse outcome. | Rescue Baseline: last observation collected between last dose of blinded treatment and Day 1 (first dose day) of rescue treatment, Rescue Weeks 2, 4, 8 and 12 | 
| Percentage of Participants With 50% Improvement in Scoring Atopic Dermatitis (SCORAD) From Rescue Baseline at Rescue Weeks 2, 4, 8 and 12: Rescue Period | SCORAD: scoring index for AD combining extent (A), severity (B), subjective symptoms (C). A: rule of 9 used to calculate BSA affected by AD as % of whole BSA for each body region- head and neck 9%; upper limbs 9% each; lower limbs 18% each; anterior trunk 18%; back 18%; genitals 1%. Score of each body region added to determine A (0-100). B: severity of each sign (erythema; edema; oozing; excoriation; skin thickening; dryness) was assessed as none (0), mild (1), moderate (2), severe (3). Severity scores added to give B (0-18). C: pruritus and sleep loss, each were scored by participant/caregiver using VAS where, 0=no itch/no sleep loss and 10=worst imaginable itch/sleep loss, higher scores=worse symptoms. Scores for itch and sleep loss added to give 'C' (0-20). SCORAD calculated as: A/5+7*B/2+C; range (0-103); higher values=worse outcome. | Rescue Baseline: last observation collected between last dose of blinded treatment and Day 1 (first dose day) of rescue treatment, Rescue Weeks 2, 4, 8 and 12 | 
| Percentage of Participants With 75% Improvement in Scoring Atopic Dermatitis (SCORAD) From Rescue Baseline at Rescue Weeks 2, 4, 8 and 12: Rescue Period | SCORAD: scoring index for AD combining extent (A), severity (B), subjective symptoms (C). A: rule of 9 used to calculate BSA affected by AD as % of whole BSA for each body region- head and neck 9%; upper limbs 9% each; lower limbs 18% each; anterior trunk 18%; back 18%; genitals 1%. Score of each body region added to determine A (0-100). B: severity of each sign (erythema; edema; oozing; excoriation; skin thickening; dryness) was assessed as none (0), mild (1), moderate (2), severe (3). Severity scores added to give B (0-18). C: pruritus and sleep loss, each were scored by participant/caregiver using VAS where, 0=no itch/no sleep loss and 10=worst imaginable itch/sleep loss, higher scores=worse symptoms. Scores for itch and sleep loss added to give 'C' (0-20). SCORAD calculated as: A/5+7*B/2+C; range (0-103); higher values=worse outcome. | Rescue Baseline: last observation collected between last dose of blinded treatment and Day 1 (first dose day) of rescue treatment, Rescue Weeks 2, 4, 8 and 12 | 
| Percentage of Participants Achieving Patient Global Assessment (PtGA) Response of 'Clear (0)' or 'Almost Clear (1)' and Greater Than or Equal to 2 Points Improvement From Baseline at Weeks 12, 16, 28, 40 and 52: Double-blind Period | Participant responded to the following question: Overall, how would you describe your Atopic Dermatitis right now? on a 5-point scale: 0= clear; 1= almost clear; 2= mild; 3= moderate; and 4= severe. Higher scores indicated more severity. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Change From Baseline in Dermatology Life Quality Index (DLQI) Score for Adults at Weeks 12, 16, 28, 40 and 52: Double-blind Period | DLQI was a 10-item questionnaire that measures the impact of skin disease. Each question was evaluated on a 4-point scale (range 0 to 3) where, 0 = not at all, 1= a little, 2= a lot, 3= very much, where higher scores indicated more impact on quality of life. Scores from all 10 questions were added up to give DLQI total score range from 0 (not at all) to 30 (very much). Higher scores indicated more impact on quality of life of participants. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Change From Baseline in Children's Dermatology Life Quality Index (CDLQI) Score for Adolescents at Weeks 12, 16, 28, 40 and 52: Double-blind Period | CDLQI is a 10-item questionnaire that measures the impact of skin disease on adolescents (aged 12-17 years) quality of life over the last week. Each question was evaluated on a 4-point scale (range 0 to 3) where, 0 = not at all , 1 = only a little, 2 = quite a lot, 3 = very much, where higher scores indicated more impact on quality of life. Scores from all 10 questions were added up to give CDLQI total score range from 0 (not at all) to 30 (very much). Higher scores indicated more impact on quality of life of children. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Change From Baseline in Hospital Anxiety and Depression Scale (HADS) - Anxiety Scale at Weeks 12, 16, 28, 40 and 52: Double-blind Period | HADS: participant rated 14-item questionnaire. HADS consisted of 2 subscales: HADS-Anxiety (HADS-A) scale and HADS-Depression (HADS-D) scale, both of these subscales comprised of 7 items each. Each item was rated on a 4-point scale, score range from 0 to 3, where higher scores indicates more anxiety/depression symptoms. HADS-A assesses state of generalized anxiety (anxious mood, restlessness, anxious thoughts, panic attacks). HADS-A: sum of all 7 items resulted in score range of 0 (no presence of anxiety) to 21 (severe feeling of anxiety); higher score indicating greater severity of anxiety. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Change From Baseline in Hospital Anxiety and Depression Scale (HADS) - Depression Scale at Weeks 12, 16, 28, 40 and 52: Double-blind Period | HADS: participant rated 14-item questionnaire. HADS consisted of 2 subscales: HADS-A scale and HADS-D scale, both of these subscales comprised of 7 items each. Each item was rated on a 4-point scale, score range from 0 to 3, where higher scores indicates more anxiety/depression symptoms. HADS-D assesses state of lost interest and diminished pleasure response (lowering of hedonic tone). HADS-D: sum of all 7 items resulted in score range of 0 (no presence of depression) to 21 (severe feeling of depression); higher score indicating greater severity of depression symptoms. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Change From Baseline in Patient Oriented Eczema Measure (POEM) Score at Weeks 12, 16, 28, 40 and 52: Double-blind Period | POEM was a 7-item participant reported outcome (PRO) measure used to assess the impact of AD (dryness, itching, flaking, cracking, sleep loss, bleeding and weeping) over the past week. Each item scored as following: no days = 0, 1-2 days = 1, 3-4 days = 2, 5-6 days = 3 and, every day = 4. The total POEM score ranges from 0 to 28, where higher score indicated greater severity. | Baseline, Weeks 12, 16, 28, 40 and 52 | 
| Change From Baseline in Pruritus and Symptoms Assessment for Atopic Dermatitis (PSAAD) Score at Weeks 12, 16, 28, 40 and 52: Double-blind Period | PSAAD is a daily participant reported symptom electronic diary. Participants rated their symptoms of AD over the past 24 hours, using 11 items (itchy skin, painful skin, dry skin, flaky skin, cracked skin, bumpy skin, red skin, discolored skin [darker or lighter], bleeding from skin, seeping or oozing fluid from skin [other than blood], and skin swelling). Participants had to think about all the areas of their body affected by their skin condition and chose the number that best described their experience for each of the 11 items, from 0 (no symptoms) to 10 (extreme symptoms), higher scores signified worse skin condition. Total PSAAD score = arithmetic mean of 11 items, 0 (no symptoms) to 10 (extreme symptoms), where higher score = worse skin condition. | Baseline, Weeks 12, 16, 28, 40 and 52 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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atopic dermatitis, atopic eczema, eczema, JAK, janus kinase