Efficacy and Safety Study of Guselkumab in the Treatment of Participants With Active Psoriatic Arthritis (PsA)

Study Overview
=================
Brief Summary
-----------------
The purpose of this study is to evaluate the efficacy, safety and tolerability of guselkumab in participants with Active Psoriatic Arthritis (PsA).

Detailed Description
-----------------
This is a multi-center (more than one clinical site will work on a medical research study), randomized (study medication assigned to participants by chance), double-blind (neither investigator nor participant knows which treatment the participant receives), placebo-controlled (placebo is an inactive substance that is compared with a drug to test whether the drug has a real effect in a clinical trial) study to determine the efficacy and safety of guselkumab in participants with PsA. The study will consist of 4 parts: Screening period (6 weeks), a double-blind treatment period (consists of guselkumab and placebo treatment for 24 weeks), an active treatment period (guselkumab for 20 weeks), and follow-up period (12 weeks). The maximal study duration for a participant will not exceed 62 weeks including the Screening period. Eligible participants will be randomly assigned to one of two groups in a 2:1 ratio to either receive Guselkumab 100 milligram (mg) at Weeks 0, 4 then every 8 weeks or Placebo at Weeks 0, 4 then every 8 weeks until Week 24. At week 24, participants remaining in the placebo group will start to receive guselkumab 100 mg at Weeks 24, 28, 36 and 44. Participants in both treatment groups who have less than (<) 5 percent (%) improvement from baseline in both tender and swollen joint counts at Week 16 will qualify for early escape and will switch to open-label therapy with ustekinumab 45 mg or 90 mg at Weeks 16, 20, 32, and 44 based on the approved dosage for the PsA indication in the particular country of study. The efficacy will be assessed primarily by measuring percentage of participants who achieve an American College of Rheumatology (ACR) 20 Response at Week 24. Participants' safety will be monitored throughout the study.

Official Title
-----------------
A Phase 2a, Multicenter, Randomized, Double-blind, Placebo-controlled Study Evaluating the Efficacy and Safety of Guselkumab in the Treatment of Subjects With Active Psoriatic Arthritis

Conditions
-----------------
Psoriatic Arthritis

Intervention / Treatment
-----------------
* Drug: Guselkumab
* Drug: Ustekinumab
* Drug: Placebo


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Has had Psoriatic Arthritis (PsA) for at least 6 months before the first administration of study drug and meet classification criteria for Psoriatic Arthritis (CASPAR) at Screening Had active PsA as defined by: At least 3 swollen joints and at least 3 tender joints at Screening and at baseline C-reactive protein (CRP) greater than or equal to (>=) 0.3 milligram (mg)/deciliter (dL) at Screening from the central laboratory Has at least 1 of the PsA subsets: distal interphalangeal joint involvement, polyarticular arthritis with absence of rheumatoid nodules, arthritis mutilans, asymmetric peripheral arthritis, or spondylitis with peripheral arthritis Has plaque psoriasis with body surface area (BSA) involvement greater than or equal to (>=) 3% at Screening and baseline Has active PsA despite current or previous non-biologic disease-modifying antirheumatic drugs (DMARD), oral corticosteroid, and/or nonsteroidal anti-inflammatory drug (NSAID) therapy If using methotrexate (MTX), oral corticosteroids or NSAIDs, the dose must be stable Exclusion Criteria: Have other inflammatory diseases that might confound the evaluations of benefit of guselkumab therapy, including but not limited to rheumatoid arthritis (RA), ankylosing spondylitis (AS), systemic lupus erythematosus, or Lyme disease Has previously received guselkumab or ustekinumab Has received more than 1 type of biologic anti-tumor necrosis factor (TNF) agent previously Have received infliximab (or its biosimilars) or golimumab intraveneous (IV) within 12 weeks before the first administration of study drug Have received adalimumab (or its biosimilars), golimumab subcutaneous (SC), certolizumab pegol or etanercept (or its biosimilars) within 8 weeks before the first administration of study drug

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Design Details

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


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Guselkumab<br>Participants will receive guselkumab 100 milligram (mg) subcutaneous injection (injected under the skin by way of a needle) at Weeks 0, 4, 12, 20, 28, 36, and 44, and placebo for guselkumab at Week 24 to maintain the blind. Participants who enter early escape at Week 16 will switch to open label therapy with ustekinumab 45 mg or 90 mg at Weeks 16, 20, 32, and 44 based on the approved dosage in the particular country of the study. | Drug: Guselkumab<br>* In the guselkumab group, Guselkumab 100 mg subcutaneous injection will be administered at Weeks 0, 4, 12, 20, 28, 36 and 44. In the placebo group, guselkumab 100 mg subcutaneous injection will be administered at Weeks 24, 28, 36 and 44 for participants remaining on placebo at Week 24.<br>Drug: Ustekinumab<br>* In both placebo and guselkumab groups, if the participants qualify for early escape, they will switch to receive ustekinumab 45 mg or 90 mg subcutaneous injection at Weeks 16, 20, 32, and 44 based on the approved dosage in the particular country of the study.<br>Drug: Placebo<br>* In placebo group, Placebo subcutaneous injection will be administered at Weeks 0, 4, 12, and 20. In guselkumab group, placebo subcutaneous injection will be administered at Week 24 to maintain the blind.<br>|
| Experimental: Placebo<br>Participants will receive placebo for guselkumab at Weeks 0, 4, 12, and 20, and guselkumab 100 mg subcutaneous injection at Weeks 24, 28, 36, and 44. Participants who enter early escape at Week 16 will switch to open label therapy with ustekinumab 45 mg or 90 mg at Weeks 16, 20, 32, and 44 based on the approved dosage in the particular country of the study. | Drug: Guselkumab<br>* In the guselkumab group, Guselkumab 100 mg subcutaneous injection will be administered at Weeks 0, 4, 12, 20, 28, 36 and 44. In the placebo group, guselkumab 100 mg subcutaneous injection will be administered at Weeks 24, 28, 36 and 44 for participants remaining on placebo at Week 24.<br>Drug: Ustekinumab<br>* In both placebo and guselkumab groups, if the participants qualify for early escape, they will switch to receive ustekinumab 45 mg or 90 mg subcutaneous injection at Weeks 16, 20, 32, and 44 based on the approved dosage in the particular country of the study.<br>Drug: Placebo<br>* In placebo group, Placebo subcutaneous injection will be administered at Weeks 0, 4, 12, and 20. In guselkumab group, placebo subcutaneous injection will be administered at Week 24 to maintain the blind.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Participants Who Achieved American College of Rheumatology (ACR) 20 Response at Week 24 | ACR 20 response: at least 20% improvement from baseline in both swollen joint (66 joints) and tender joint (68 joints) counts and at least 20% improvement from baseline in 3 of following 5 assessments: patient's assessment of pain (VAS: 0-100 millimeter [mm], 0=no pain and 100=worst possible pain), patient's global assessment of disease activity on arthritis (VAS:0-100mm, 0=excellent and 100=poor), physician's global assessment of disease activity (VAS:0-100mm; 0=no arthritis activity and 100 = extremely active arthritis), patient's assessment of physical function measured by HAQ-DI (defined as a 20-question instrument assessing 8 functional areas;derived HAQ-DI ranges from 0=no difficulty, to 3=inability to perform a task in that area) and serum CRP. Treatment Failure (TF) criteria: Discontinued study drug due to lack of efficacy or worsening of PsA, initiated or increased dose of methotrexate or oral corticosteroids, or initiated prohibited PsA treatments. FAS is full analysis set. | Week 24 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Participants Who Achieved a Psoriasis Area and Severity Index (PASI)-75 Response at Week 24 | The PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 (indicates no involvement) to 6 (90 percentage (%)-100% involvement), and for erythema, induration and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that could range from 0 (no psoriasis) to 72 (worst condition). PASI 75 response was defined as at least a 75% reduction in PASI relative to Baseline. As planned, results data was analyzed and reported for the specified arms for this outcome measure. | Week 24 | 
| Change From Baseline in Health Assessment Questionnaire-Disability Index (HAQ-DI) Score at Week 24 | Change from baseline in HAQ-DI score is a measure of the change in the physical function, where a negative change reflects an improvement and a positive change reflects worsening of physical function. HAQ-DI is a 20-question instrument that assesses the degree of difficulty a person has in accomplishing tasks in 8 functional areas (dressing, arising, eating, walking, hygiene, reaching, gripping, and activities of daily living). Responses in each functional area are scored from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area (that is, lower scores are indicative of better functioning). The total HAQ-DI score ranges from 0-24 with lower score indicating better functioning. | Baseline and Week 24 | 
| Percentage of Participants Who Achieved an ACR 20 Response at Week 16 | ACR 20 response is defined as at least 20 percent (%) improvement from baseline in both swollen joint (66 joints) and tender joint (68 joints) counts and at least 20% improvement from baseline in 3 of following 5 assessments: patient's assessment of pain (visual analog scale [VAS]: 0-100 millimeter [mm]; 0=no pain and 100=worst possible pain), patient's global assessment of disease activity on arthritis (VAS: 0-100 mm, 0=excellent and 100=poor), physician's global assessment of disease activity (VAS: 0-100mm; 0=no arthritis activity and 100 = extremely active arthritis), patient's assessment of physical function measured by Health Assessment Questionnaire-Disability Index (HAQ-DI, defined as a 20-question instrument assessing 8 functional areas;derived HAQ-DI ranges from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area) and serum C-Reactive Protein (CRP). | Week 16 | 
| Percentage of Participants Who an Achieved ACR 50 Response at Week 24 | ACR 50 response is defined as at least 50 % improvement from baseline in both swollen joint (66 joints) and tender joint (68 joints) counts and at least 50% improvement from baseline in 3 of following 5 assessments: patient's assessment of pain (VAS:0-100 mm; 0=no pain and 100=worst possible pain), patient's global assessment of disease activity on arthritis (VAS:0-100mm; 0=excellent and 100=poor), physician's global assessment of disease activity (VAS: 0-100mm; 0=no arthritis activity and 100 = extremely active arthritis), patient's assessment of physical function measured by HAQ-DI (defined as a 20-question instrument assessing 8 functional areas;derived HAQ-DI ranges from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area) and serum CRP. | Week 24 | 
| Percent Change From Baseline in Leeds Enthesitis Index (LEI) Scores Among Participants With Enthesitis at Week 24 | Enthesitis was assessed using the Leeds Enthesitis Index (LEI). The LEI was developed to assess enthesitis in participants with psoriatic arthritis (PsA), and evaluates the presence (score of 1) or absence of pain (score of 0) by applying local pressure to Lateral elbow epicondyle, left and right, Medial femoral condyle, left and right, and Achilles tendon insertion, left and right. LEI scores ranging from 0 (0 sites with tenderness) to 6 (worst possible score; 6 sites with tenderness). | Baseline and Week 24 | 
| Percent Change From Baseline in Dactylitis Scores Among Participants With Dactylitis at Baseline at Week 24 | Dactylitis is characterized by swelling of the entire finger or toe. The severity of dactylitis is scored on a scale of 0-3, where 0, 1, 2, 3 indicates none, mild, moderate, severe, respectively in each digit of the hands and feet. The range of total dactylitis scores for a participant is 0-60. Higher score indicates more severe dactylitis. | Baseline and Week 24 | 
| Percentage of Participants Who Achieved ACR 20, ACR 50, and ACR 70 Responses at Weeks 4, 8, 12, 16, 20, and 24 | ACR 20, 50, and 70 response is defined as at least 20%, 50%, and 70% improvement from baseline in swollen joint (66 joints) and tender joint (68 joints) counts and at least 20%, 50%, and 70% improvement from baseline in 3 of following 5 assessments: patient's assessment of pain (VAS: 0-100mm, 0=no pain and 100=worst possible pain), patient's global assessment of disease activity on arthritis (VAS: 0-100mm; 0=excellent and 100=poor), physician's global assessment of disease activity (VAS: 0-100mm; 0=no arthritis activity and 100= extremely active arthritis), patient's assessment of physical function measured by Health Assessment Questionnaire-Disability Index (HAQ-DI, defined as a 20-question instrument assessing 8 functional areas;derived HAQ-DI ranges from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area) and serum C-Reactive Protein (CRP). | Weeks 4, 8, 12, 16, 20, and 24 | 
| Percentage of Participants Who Achieved ACR 20, ACR 50, and ACR 70 Responses at Weeks 24, 28, 32, 36, 44, and 56 | ACR 20, ACR 50 and ACR 70 response is defined as at least 20%, 50%, and 70% improvement from baseline in swollen joint (66 joints) and tender joint (68 joints) counts and at least 20%, 50%, and 70% improvement from baseline in 3 of following 5 assessments: patient's assessment of pain (VAS: 0-100mm, 0=no pain and 100=worst possible pain), patient's global assessment of disease activity on arthritis (VAS: 0-100mm; 0=excellent and 100=poor), physician's global assessment of disease activity (VAS; 0-100mm; 0=no arthritis activity and 100 = extremely active arthritis), patient's assessment of physical function measured by Health Assessment Questionnaire-Disability Index (HAQ-DI, defined as a 20-question instrument assessing 8 functional areas;derived HAQ-DI ranges from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area) and serum C-Reactive Protein (CRP). As planned, results data was analyzed and reported for the specified arms for this outcome measure. | Weeks 24, 28, 32, 36, 44, and 56 | 
| Percent Change From Baseline in the ACR Components at Weeks 12 and 24 | The 7 components of ACR response are: swollen joint counts (0-66), tender joint counts (0-68), patient's assessment of pain (PAIN) (VAS:0-100mm; 0=no pain and 100=worst possible pain), patient's global assessment of disease activity (GDPT) on arthritis (VAS:0-100mm; 0=excellent and 100= poor), physician's global assessment of disease activity (GDEV) (VAS: 0-100mm; 0=no arthritis activity and 100 = extremely active arthritis), patient's assessment of physical function measured by HAQ-DI (20-question instrument assessing 8 functional areas (total score of 0-24 with lower score indicating better functioning);derived HAQ-DI ranges from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area) and serum CRP. | Baseline and Weeks 12, 24 | 
| Percent Change From Baseline in the ACR Components at Weeks 24, 28, 32, 36, 44 and 56 | The 7 components of ACR response are: swollen joint counts (0-66), tender joint counts (0-68), patient's assessment of pain (PAIN) (VAS:0-100mm; 0=no pain and 100=worst possible pain), patient's global assessment of disease activity (GDPT) on arthritis (VAS:0-100mm; 0=excellent and 100= poor), physician's global assessment of disease activity (GDEV) (VAS: 0-100mm; 0=no arthritis activity and 100 = extremely active arthritis), patient's assessment of physical function measured by HAQ-DI (20-question instrument assessing 8 functional areas (total score of 0-24 with lower score indicating better functioning);derived HAQ-DI ranges from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area) and serum CRP. | Basline and Weeks 24, 28, 32, 36, 44, 56 | 
| Change From Baseline in HAQ-DI Response at Weeks 4, 8, 12, 16, 20, and 24 | Change from baseline in HAQ-DI score is a measure of the change in the physical function, where a negative change reflects an improvement and a positive change reflects worsening of physical function. HAQ-DI is a 20-question instrument that assesses the degree of difficulty a person has in accomplishing tasks in 8 functional areas (dressing, arising, eating, walking, hygiene, reaching, gripping, and activities of daily living). Responses in each functional area are scored from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area (that is, lower scores are indicative of better functioning). The total HAQ-DI score ranges from 0-24 with lower score indicating better functioning. | Baseline and Weeks 4, 8, 12, 16, 20, 24 | 
| Change From Baseline in HAQ-DI Score at Weeks 24, 28, 32, 36, 44, and 56 | Change from baseline in HAQ-DI score is a measure of the change in the physical function, where a negative change reflects an improvement and a positive change reflects worsening of physical function. HAQ-DI is a 20-question instrument that assesses the degree of difficulty a person has in accomplishing tasks in 8 functional areas (dressing, arising, eating, walking, hygiene, reaching, gripping, and activities of daily living). Responses in each functional area are scored from 0, indicating no difficulty, to 3, indicating inability to perform a task in that area (that is, lower scores are indicative of better functioning). The total HAQ-DI score ranges from 0-24 with lower score indicating better functioning. | Baseline and Weeks 24, 28, 32, 36, 44, 56 | 
| Percentage of Participants Who Achieved a HAQ-DI Response With Greater Than or Equal to (>=) 0.3 Improvement From Baseline in HAQ-DI Score at Weeks 4, 8, 12, 16, 20, and 24 | HAQ-DI response was defined as >= 0.3 improvement from baseline in HAQ-DI score. HAQ-DI is a 20-question instrument that assesses the degree of difficulty a person has in accomplishing tasks in 8 functional areas (dressing, arising, eating, walking, hygiene, reaching, gripping, and activities of daily living). Responses in each functional area are scored from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area (that is, lower scores are indicative of better functioning). The total HAQ-DI score ranges from 0-24 with lower score indicating better functioning. | Weeks 4, 8, 12, 16, 20, and 24 | 
| Percentage of Participants Who Achieved an HAQ-DI Response With >= -0.3 Improvement From Baseline in HAQ-DI Score at Weeks 24, 28, 32, 36, 44, and 56 | HAQ-DI response was defined as >= 0.3 improvement from baseline in HAQ-DI score. HAQ-DI is a 20-question instrument that assesses the degree of difficulty a person has in accomplishing tasks in 8 functional areas (dressing, arising, eating, walking, hygiene, reaching, gripping, and activities of daily living). Responses in each functional area are scored from 0 indicating no difficulty, to 3 indicating inability to perform a task in that area (that is, lower scores are indicative of better functioning). The total HAQ-DI score ranges from 0-24 with lower score indicating better functioning. As planned, results data was analyzed and reported for the specified arms for this outcome measure. | Weeks 24, 28, 32, 36, 44, 56 | 
| Percent Change From Baseline in Dactylitis Scores at Weeks 4, 8, 16, and 24 | Dactylitis is characterized by swelling of the entire finger or toe. The severity of dactylitis is scored on a scale of 0-3, where 0, 1, 2, 3 indicates none, mild, moderate, severe, respectively in each digit of the hands and feet. The range of total dactylitis scores for a participant is 0-60. Higher score indicates more severe dactylitis. | Baseline and Weeks 4, 8, 16, 24 | 
| Percent Change From Baseline in Dactylitis Scores at Weeks 24, 28, 32, 44, 56 | Dactylitis was characterized by swelling of the entire finger or toe. The severity of dactylitis is scored on a scale of 0-3, where 0, 1, 2, 3 indicates none, mild, moderate, severe, respectively in each digit of the hands and feet. The range of total dactylitis scores for a participant is 0-60. Higher score indicates more severe dactylitis. As planned, results data was analyzed and reported for the specified arms for this outcome measure. | Baseline and Weeks 24, 28, 32, 44, 56 | 
| Percentage of Participants With Dactylitis at Weeks 4, 8, 16, and 24 | Dactylitis is characterized by swelling of the entire finger or toe. The severity of dactylitis is scored on a scale of 0-3, where 0, 1, 2, 3 indicates none, mild, moderate, severe, respectively in each digit of the hands and feet. The range of total dactylitis scores for a participant is 0-60. Participants with dactylitis had dactylitis score >0. Higher score indicates more severe dactylitis. | Weeks 4, 8, 16, and 24 | 
| Percentage of Participants With Dactylitis at Weeks 24, 28, 32, 44, and 56 | Dactylitis was characterized by swelling of the entire finger or toe. The severity of dactylitis is scored on a scale of 0-3, where 0, 1, 2, 3 indicates none, mild, moderate, severe, respectively in each digit of the hands and feet. The range of total dactylitis scores for a participant is 0-60. Higher score indicates greater degree of tenderness. | Weeks 24, 28, 32, 44, and 56 | 
| Percent Change From Baseline in LEI Scores at Week 4, 8, 16, and 24 | Enthesitis was assessed using the Leeds Enthesitis Index (LEI). The LEI was developed to assess enthesitis in participants with psoriatic arthritis (PsA), and evaluates the presence (score of 1) or absence of pain (score of 0) by applying local pressure to Lateral elbow epicondyle, left and right, Medial femoral condyle, left and right, and Achilles tendon insertion, left and right. LEI scores ranging from 0 (0 sites with tenderness) to 6 (worst possible score; 6 sites with tenderness). | Baseline and Weeks 4, 8, 16, 24 | 
| Percent Change From Baseline in LEI Scores at Weeks 24, 28, 32, 44, and 56 | Enthesitis will be assessed using the Leeds Enthesitis Index (LEI). The LEI was developed to assess enthesitis in participants with PsA, and evaluates the presence (score of 1) or absence of pain (score of 0) by applying local pressure to Lateral elbow epicondyle, left and right, Medial femoral condyle, left and right, and Achilles tendon insertion, left and right. LEI scores ranging from 0 (0 sites with tenderness) to 6 (worst possible score; 6 sites with tenderness). | Baseline and Weeks 24, 28, 32, 44, 56 | 
| Percentage of Participants With Enthesitis Based on LEI Score at Weeks 4, 8, 16, and 24 in Participants With Enthesitis at Baseline | Enthesitis was assessed using the Leeds Enthesitis Index (LEI). The LEI was developed to assess enthesitis in participants with PsA, and evaluates the presence (score of 1) or absence of pain (score of 0) by applying local pressure to Lateral elbow epicondyle, left and right, Medial femoral condyle, left and right, and Achilles tendon insertion, left and right. Participants with enthesitis had LEI score >0. LEI scores ranging from 0 (0 sites with tenderness) to 6 (worst possible score; 6 sites with tenderness). | Weeks 4, 8, 16, and 24 | 
| Percentage of Participants With Enthesitis Based on LEI at Weeks 24, 28, 32, 44, and 56 in Participants With Enthesitis at Baseline | Enthesitis will be assessed using the Leeds Enthesitis Index (LEI). The LEI was developed to assess enthesitis in participants with PsA, and evaluates the presence (score of 1) or absence of pain (score of 0) by applying local pressure to Lateral elbow epicondyle, left and right, Medial femoral condyle, left and right, and Achilles tendon insertion, left and right. Participants with enthesitis had LEI score >0. LEI scores ranging from 0 (0 sites with tenderness) to 6 (worst possible score; 6 sites with tenderness). | Weeks 24, 28, 32, 44, and 56 | 
| Change From Baseline in Psoriatic ArthritiS Disease Activity Score (PASDAS) Score at Weeks 16 and 24 | Change from baseline in PASDAS score measures the change in disease activity where a negative value indicates an improvement and a positive value indicates worsening of PsA disease activity. PASDAS is a PsA disease activity score that assesses 4 domains (joints, entheses, dactylitis and quality of life) of PsA. PASDAS is a derived score combining Patient's Global Assessment of Disease Activity (arthritis and psoriasis, on a 100-unit VAS), Physician's Global Assessment of Disease Activity (on a 100-unit VAS), swollen joint count (66 joints), tender joint count (68 joints), CRP (mg/L), enthesitis based on LEI (scaled to a 0-6 range), dactylitis count (scoring each digit from 0-3 and recoding to 0-1, where any score > 0 equaled 1), and the PCS score of the SF-36 health survey. The total score range is 0-10 and the cutoffs for disease activity were 3.2 (low) to 5.4 (high). Negative changes from baseline indicate improvement of overall disease activity. | Baseline and Weeks 16, 24 | 
| Change From Baseline in PASDAS Score at Weeks 24 and 44 | Change from baseline in PASDAS score measures the change in disease activity where a negative value indicates an improvement and a positive value indicates worsening of PsA disease activity. PASDAS is a PsA disease activity score that assesses 4 domains (joints, entheses, dactylitis and quality of life) of PsA. PASDAS is a derived score combining Patient's Global Assessment of Disease Activity (arthritis and psoriasis, on a 100-unit VAS), Physician's Global Assessment of Disease Activity (on a 100-unit VAS), swollen joint count (66 joints), tender joint count (68 joints), CRP (mg/L), enthesitis based on LEI (scaled to a 0-6 range), dactylitis count (scoring each digit from 0-3 and recoding to 0-1, where any score > 0 equaled 1), and the PCS score of the SF-36 health survey. The total score range is 0-10 and the cutoffs for disease activity were 3.2 (low) to 5.4 (high). Negative changes from baseline indicate improvement of overall disease activity. | Baseline and Weeks 24, 44 | 
| Change From Baseline in GRAppa Composite scorE (GRACE) Index Score at Weeks 16 and 24 | Change from baseline in GRACE index score measures the change in disease activity, where a negative change indicates an improvement and a positive change indicates a worsening of PsA disease activity. GRACE index was converted from Arithmetic Mean of the Desirability Function (AMDF). AMDF is calculated by transforming all variables using predefined algorithms and expressing the total score as a mean with a score range of 0 - 1, where 1 indicates a better state than 0. GRACE Index = (1 - AMDF)*10, where GRACE index has a range of 0-10, with higher scores indicate more active disease. As planned, results data was analyzed and reported for the specified arms for this outcome measure. | Baseline and Weeks 16, 24 | 
| Change From Baseline in GRACE Index Score at Weeks 24 and 44 | Change from baseline in GRACE index score measures the change in disease activity, where a negative change indicates an improvement and a positive change indicates a worsening of PsA disease activity. GRACE index was converted from Arithmetic Mean of the Desirability Function (AMDF). AMDF is calculated by transforming all variables using predefined algorithms and expressing the total score as a mean with a score range of 0 - 1, where 1 indicates a better state than 0. GRACE Index = (1 - AMDF)*10, where GRACE index has a range of 0-10, with higher scores indicate more active disease. | Baseline and Weeks 24, 44 | 
| Change From Baseline in Modified Composite Psoriatic Disease Activity Index (mCPDAI) Score at Weeks 16 and 24 | The mCPDAI assessed 4 domains (joints, skin, entheses, and dactylitis). The mCPDAI scores were calculated using the following assessments: joints (66 swollen and 68 tender joint counts), HAQ-DI score, PASI, dactylitis, and enthesitis. Within each domain a score (range 0-3) was assigned, where 0= Not involved, 1= Mild, 2= Moderate and 3= Severe. The scores for each domain were then added together to give a final score range of 0 to 12. A higher score indicates more active disease activity. Negative changes from baseline indicate improvement of PsA disease activity. | Baseline and Weeks 16, 24 | 
| Change From Baseline in mCPDAI Index Score at Weeks 24 and 44 | The mCPDAI assessed 4 domains (joints, skin, entheses, and dactylitis). The mCPDAI scores were calculated using the following assessments: joints (66 swollen and 68 tender joint counts), HAQ-DI score, PASI, dactylitis, and enthesitis. Within each domain a score (range 0-3) was assigned, where 0= Not involved, 1= Mild, 2= Moderate and 3= Severe. The scores for each domain were then added together to give a final score range of 0 to 12. A higher score indicates more active disease activity. Negative changes from baseline indicate improvement of PsA disease activity. | Baseline and Weeks 24, 44 | 
| Change From Baseline in Disease Activity Index for Psoriatic Arthritis (DAPSA) Score at Weeks 4, 8, 12, 16, 20 and 24 | Change from baseline in DAPSA measures the change in disease activity, where a negative change indicates an improvement and a positive change indicates worsening of disease activity. DAPSA score is a the sum of swollen joint count (66 joints), tender joint count (68 joints), CRP (mg/dL), Patient's Assessment of Pain (on a 10-unit VAS;0=no pain, 10=worst possible pain), and Patient's Global Assessment of Disease Activity (arthritis, on a 10-unit VAS; 0 to 100 centimeter [cm] VAS, 0=excellent and 10=poor). Cut-off values for disease activity: 0-4 remission; 5-14 low; 15-28 moderate; >28 high. | Baseline and Weeks 4, 8, 12, 16, 20, 24 | 
| Change From Baseline in DAPSA Index Score at Weeks 24, 28, 32, 36, 44, and 56 | Change from baseline in DAPSA measures the change in disease activity, where a negative change indicates an improvement and a positive change indicates worsening of disease activity. DAPSA score is a the sum of swollen joint count (66 joints), tender joint count (68 joints), CRP (mg/dL), Patient's Assessment of Pain (on a 10-unit VAS;0=no pain, 10=worst possible pain), and Patient's Global Assessment of Disease Activity (arthritis, on a 10-unit VAS; 0 to 10cm VAS, 0=excellent and 10=poor). Cut-off values for disease activity: 0-4 remission; 5-14 low; 15-28 moderate; >28 high. | Baseline and Weeks 24, 28, 32, 36, 44, 56 | 
| Percentage of Participants Who Achieved Minimal Disease Activity (MDA) at Weeks 16 and 24 | MDA defines a satisfactory state of disease activity that includes 5 domains of PsA (joint symptoms, skin psoriasis, patient's perspective of pain and disease activity on arthritis and psoriasis, physical function and enthesitis). Participants were classified as achieving MDA if they fulfilled 5 of 7 outcome measures: tender joint count <=1; swollen joint count <=1; PASI <=1; patient pain VAS score of <=15 mm; patient global disease activity on arthritis and psoriasis; VAS score of <=20 mm; Health Assessment Questionnaire score <=0.5; and tender entheseal points <=1. | Weeks 16 and 24 | 
| Percentage of Participants Who Achieved MDA at Weeks 24 and 44 | MDA defines a satisfactory state of disease activity that includes 5 domains of PsA (joint symptoms, skin psoriasis, patient's perspective of pain and disease activity on arthritis and psoriasis, physical function and enthesitis). Participants were classified as achieving MDA if they fulfilled 5 of 7 outcome measures: tender joint count <=1; swollen joint count <=1; PASI <=1; patient pain VAS score of <=15 mm; patient global disease activity on arthritis and psoriasis; VAS score of <=20 mm; Health Assessment Questionnaire score <=0.5; and tender entheseal points <=1. | Weeks 24 and 44 | 
| Change From Baseline in the Physical and Mental Component Summary (PCS and MCS) Scores of 36- Item Short Form Health Assessment Questionnaire (SF-36) at Weeks 16 and 24 | SF-36 is a multi-domain instrument with 36 items to evaluate the health status and quality of life. It included 8 subscales (physical functioning, physical role functioning, bodily pain, general health perception, vitality, social functioning, emotional role functioning, and mental health), which yielded a Physical Component Summary (PCS) with score range 0-100 (higher score-better quality of life) and a Mental Component Summary (MCS) with score range 0-100 (higher score-better quality of life) in addition to subscale scores. The PCS and MCS scores are normalized to a mean of 50 and standard deviations of 10, based upon general US population norms as presented in this outcome measure. A positive change indicates improvement while a negative change indicates worsening of health status and quality of life. | Baseline and Weeks 16, 24 | 
| Change From Baseline in the PCS Scores of SF-36 at Weeks 24 and 44 | SF-36 is a multi-domain instrument with 36 items to evaluate the health status and quality of life. It included 8 subscales (physical functioning, physical role functioning, bodily pain, general health perception, vitality, social functioning, emotional role functioning, and mental health), which yielded a Physical Component Summary (PCS) with score range 0-100 (higher score-better quality of life) and a Mental Component Summary (MCS) with score range 0-100 (higher score-better quality of life) in addition to subscale scores. The PCS scores are normalized to a mean of 50 and standard deviations of 10, based upon general US population norms as presented in this outcome measure. A positive change indicates improvement while a negative change indicates worsening of health status and quality of life. | Baseline and Weeks 24, 44 | 
| Change From Baseline in the MCS Scores of SF-36 at Weeks 24 and 44 | SF-36 is a multi-domain instrument with 36 items to evaluate the health status and quality of life. It included 8 subscales (physical functioning, physical role functioning, bodily pain, general health perception, vitality, social functioning, emotional role functioning, and mental health), which yielded a Physical Component Summary (PCS) with score range 0-100 (higher score-better quality of life) and a Mental Component Summary (MCS) with score range 0-100 (higher score-better quality of life) in addition to subscale scores. The MCS scores are normalized to a mean of 50 and standard deviations of 10, based upon general US population norms as presented in this outcome measure. A positive change indicates improvement while a negative change indicates worsening of health status and quality of life. | Baseline and Weeks 24, 44 | 
| Change From Baseline in Norm-based SF-36 Scales at Week 16 and 24 | SF-36 evaluates 8 individual subscales (physical functioning, role-physical, bodily pain, general health, vitality, social functioning, role-emotional, and mental health). Each 8 scales scored from 0 to 100 with higher scores= better health. The scores are normalized to a mean of 50 and standard deviations of 10, based upon general US population norms. Higher scores indicate better health. A positive change indicates improvement while a negative change indicates worsening of health status and quality of life. | Baseline and Weeks 16, 24 | 
| Change From Baseline in Norm-based SF-36 Scale at Week 24 and 44 | SF-36 evaluates 8 individual subscales (physical functioning, role-physical, bodily pain, general health, vitality, social functioning, role-emotional, and mental health). Each 8 scales scored from 0 to 100 with higher scores= better health. The scores are normalized to a mean of 50 and standard deviations of 10, based upon general US population norms. Higher scores indicate better health. A positive change indicates improvement while a negative change indicates worsening of health status and quality of life. | Baseline and Weeks 24, 44 | 
| Change From Baseline in Routine Assessment of Patient Index Data 3 (RAPID3) Score at Weeks 16 and 24 | RAPID3 is a multi-dimensional health assessment questionnaire that was designed for use in routine clinical care. Three core data set for function, pain, and patient global estimate of disease activity were recorded. Each was scored 0-10 and the score ranges from 0 to 30 with higher scores indicating worse condition. A negative change from baseline indicates improvement in condition. | Baseline and Weeks 16, 24 | 
| Change From Baseline in RAPID3 Score at Weeks 24 and 44 | RAPID3 is a multi-dimensional health assessment questionnaire that was designed for use in routine clinical care. Three core data set for function, pain, and patient global estimate of disease activity were recorded. Each was scored 0-10 and the score ranges from 0 to 30 with higher scores indicating worse condition. A negative change from baseline indicates improvement in condition. | Baseline and Weeks 24, 44 | 
| Percentage of Participants Who Achieved a PASI 50, PASI 75, PASI 90 and PASI 100 Response at Weeks 16 and 24 | The PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 (indicates no involvement) to 6 (90 percentage (%)-100% involvement), and for erythema, induration and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that could range from 0 (no psoriasis) to 72. PASI 50, 75, 90, and 100 responses were defined as at least a 50%, 75%, 90%, and 100% reduction in PASI relative to Baseline respectively. As planned, results data was analyzed and reported for the specified arms for this outcome measure. | Weeks 16 and 24 | 
| Percentage of Participants Who Achieved a PASI 50, PASI 75, PASI 90 and PASI 100 Response at Weeks 24, 28, 32, 44, and 56 | The PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 (indicates no involvement) to 6 (90 percentage (%)-100% involvement), and for erythema, induration and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that could range from 0 (no psoriasis) to 72. PASI 50, 75, 90, and 100 responses were defined as at least a 50%, 75%, 90%, and 100% reduction in PASI relative to Baseline respectively. | Weeks 24, 28, 32, 44, and 56 | 
| Percent Change From Baseline in PASI Score at Weeks 4, 8, 16, and 24 | The PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 (indicates no involvement) to 6 (90 percentage (%)-100% involvement), and for erythema, induration and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that could range from 0 (no psoriasis) to 72. A negative percent change from baseline indicates the percent improvement from baseline in the severity of psoriatic lesions. As planned, results data was analyzed and reported for the specified arms for this outcome measure. | Baseline and Weeks 4, 8, 16, 24 | 
| Percent Change From Baseline in PASI Score at Weeks 24, 28, 32, 44, and 56 | The PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 (indicates no involvement) to 6 (90 percentage (%)-100% involvement), and for erythema, induration and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that could range from 0 (no psoriasis) to 72. A negative percent change from baseline indicates the percent improvement from baseline in the severity of psoriatic lesions. | Baseline and Weeks 24, 28, 32, 44, 56 | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Placebo, Psoriatic Arthritis, Guselkumab, Ustekinumab