A Long Term Safety Extension Study (CHS-0214-05)

Study Overview
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Brief Summary
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An Open-label, Safety Extension Study (OLSES) evaluating the longer-term safety and durability of response of subjects who completed 48 weeks of evaluations in the confirmatory safety and efficacy studies, CHS 0214-02 or CHS-0214-04, evaluating CHS-0214 in patients with rheumatoid arthritis (RA) and plaque psoriasis (PsO), respectively.

Official Title
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An Open-Label Safety Extension Study (OLSES) Evaluating the Long Term Safety and Durability of Response of CHS-0214 (CHS-0214-05)

Conditions
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Rheumatoid Arthritis, Plaque Psoriasis

Intervention / Treatment
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* Drug: CHS-0214


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Have completed 48 weeks of evaluations in CHS-0214-02 and, at Week 48, had at least an ACR20, or completed 48 weeks of evaluations in CHS-0214-04 and, at Week 48, had at least a PASI-50 Exclusion Criteria: None

Ages Eligible for Study
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Minimum Age: 18 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
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: CHS-0214<br>CHS-0214 50 mg weekly | Drug: CHS-0214<br>* Open label<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Durability of Response (Maintenance of an ACR20 Response or Greater), Which Was Measured at Each Visit in Subjects of RA | The ACR20 is a composite endpoint based on the following assessments: 66/68 swollen joint count (SJC) or tender joint count (TJC), Subject's pain assessment (SPA)-visual analog scale (VAS),Subject's global assessment of disease activity (SGA)-VAS,Physician's global assessment of disease activity (PGA)-VAS, Health Assessment Questionnaire-Disability Index (HAQ-DI), and High sensitivity C-reactive protein (hs-CRP).The baseline value to assess the ACR20 during this study was the same baseline value used to assess the ACR20 during the parent study (ie, the Week 0 assessment in the parent study). Subjects were considered an ACR20 responder at a visit if compared to baseline in the parent study (CHS-0214-02) they achieved: At least 20% decrease in SJC, At least 20% decrease in TJC, and At least 20% improvement in at least 3 of the following 5 measures: C-reactive protein, HAQ-DI, SPA (using a VAS) for pain,SGA (using a VAS), orPGA (using a VAS). | 48 Weeks | 
| In Subjects With PsO, Durability of Response (Maintenance of PASI-50 Response or Greater), Which Was Measured at Each Visit. | All PASI score assessors must have demonstrated proficiency at performing the PASI. Every attempt was made to use the same assessor for each subject throughout the study. n subjects with PsO, durability of response (maintenance of a PASI-50 response or greater at each assessment) was based on scoring the PsO lesions on a scale of 0 to 4 for 3 characteristics: erythema, induration, and desquamation, and within 4 anatomical regions: head, trunk, upper extremities, and lower extremities. Within each of these regions, the area of involvement was scored on a scale of 0 to 6, with the total score being a weighted average, and weights defined by the area of involvement. The clinician assessed the subject's PsO lesions according to the PASI and provided this score within the case report form at Weeks 0 (as the Week 48 assessment of the parent study), 4, 12, 24, 36, and 48. Subjects were classified as having a PASI-50 response based upon 50% reduction from baseline of the parent study. | Week 0,4,12,24,36,48 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Disease Activity Score Using 28 Tender and Swollen Joint Counts, High Sensitivity C-reactive Protein, and Subject's Global Assessment of Disease Activity (DAS28-CRP[4]) <3.2 (ie, Low Disease Activity) at All Visits for All Subjects With RA. | The DAS28-CRP(4) is a composite score (ranging from 0 to 9.4) calculated using the results of the TJC (using a 28 joint subset), SJC (using a 28 joint subset), hs-CRP level (mg/L), and SGA (0 to 100 scale). The DAS28-CRP(4) was calculated using the following formula:0.56*sqrt(28TJC) + 0.28*sqrt(28SJC) + 0.36*ln(CRP+1) + 0.014* SGA + 0.96. For DAS28-CRP(4), scores indicating high disease activity are >5.1; low disease activity are <3.2;and remission are <2.6. | 108 Weeks | 
| DAS28-CRP(4) <2.6 (ie, Remission) on All Visits After DAS28-CRP(4) <2.6 Was Achieved for Subjects With RA. | The DAS28-CRP(4) is a composite score (ranging from 0 to 9.4) calculated using the results of the TJC (using a 28 joint subset), SJC (using a 28 joint subset), hs-CRP level (mg/L), and SGA (0 to 100 scale). The DAS28-CRP(4) was calculated using the following formula:0.56*sqrt(28TJC) + 0.28*sqrt(28SJC) + 0.36*ln(CRP+1) + 0.014* SGA + 0.96. For DAS28-CRP(4), scores indicating high disease activity are >5.1; low disease activity are <3.2;and remission are <2.6. | 48 Weeks |