Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Change From Baseline in Disease Activity Score (DAS) Based on 28 Joints Using C-reactive Protein (CRP) DAS28 (CRP) at Week 12 |
The DAS28(CRP) is a measure of the participant's disease activity calculated using the tender joint counts (28 joints), swollen joint counts (28 joints), subject's global assessment (SGA) of disease activity assessed using visual analog scale (VAS) on a scale of 0-100 (0 indicating no arthritis and 100 indicating extremely active arthritis), and high-sensitivity C-reactive protein (hsCRP) measurement for a total possible score of 1 to 9.4. Higher values indicate higher disease activity. A negative change from baseline indicates improvement. |
Baseline, Week 12 |
|
Secondary |
Percentage of Participants Who Achieve American College of Rheumatology 20% Improvement (ACR20) Response at Week 12 |
ACR20 response is achieved when the participant has: =20% improvement (reduction) from baseline in tender joint count based on 68 joints (TJC68), swollen joint count based on 66 joints (SJC66) and in at least 3 of the following 5 items: physician's global assessment of disease activity (PGA) assessed using VAS on a scale of 0-100 (0 indicating no disease activity and 100 indicating maximum disease activity) and SGA assessed using VAS on a scale of 0-100 (0 indicating no arthritis and 100 indicating extremely active arthritis); participant's pain assessment using VAS on a scale of 0-100 (0 indicating no pain and 100 indicating severe pain); health assessment questionnaire-disability index (HAQ-DI) score contains 20 questions,8 components: dressing/ grooming, arising, eating, walking, hygiene, reach, grip, and errands/chores and scored on a scale of 0-3 (0 and 3 indicating without difficulty and unable to do); hsCRP. |
Week 12 |
|
Secondary |
Percentage of Participants Who Achieve ACR 50% Improvement (ACR50) Response at Week 12 |
ACR50 response is achieved when the participant has: = 50% improvement (reduction) from baseline in TJC68, SJC66 and in at least 3 of the following 5 items: PGA assessed using VAS on a scale of 0-100 (0 indicating no disease activity and 100 indicating maximum disease activity) and SGA assessed using VAS on a scale of 0-100 (0 indicating no arthritis and 100 indicating extremely active arthritis); participant's pain assessment using VAS on a scale of 0-100 (0 indicating no pain and 100 indicating severe pain); HAQ-DI score contains 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip, and errands/chores and scored on a scale of 0-3 (0 and 3 indicating without difficulty and unable to do); hsCRP. |
Week 12 |
|
Secondary |
Percentage of Participants Who Achieve ACR 70% Improvement (ACR70) Response at Week 12 |
ACR70 response is achieved when the participant has: = 70% improvement (reduction) from baseline in TJC68, SJC66 and in at least 3 of the following 5 items: PGA assessed using VAS on a scale of 0-100 (0 indicating no disease activity and 100 indicating maximum disease activity) and SGA assessed using VAS on a scale of 0-100 (0 indicating no arthritis and 100 indicating extremely active arthritis); participant's pain assessment using VAS on a scale of 0-100 (0 indicating no pain and 100 indicating severe pain); HAQ-DI score contains 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip, and errands/chores and scored on a scale of 0-3 (0 and 3 indicating without difficulty and unable to do); hsCRP. |
Week 12 |
|
Secondary |
Change From Baseline in Simplified Disease Activity Index (SDAI) at Week 12 |
SDAI is a composite measure that sums the TJC28, SJC28, SGA, PGA, and the hsCRP (in mg/dL). PGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no disease activity and maximum disease activity) and SGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no arthritis and extremely active arthritis). Higher score indicates more severe disease activity status and total possible score is 0 to 86. A negative change from baseline indicates improvement. |
Baseline, Week 12 |
|
Secondary |
Change From Baseline in Clinical Disease Activity Index (CDAI) at Week 12 |
CDAI is calculated using formula: CDAI = TJC based on 28 joints (TJC28) + SJC based on 28 joints (SJC28) + SGA + PGA. PGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no disease activity and maximum disease activity) and SGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no arthritis and extremely active arthritis). CDAI can range from 0 to 76, with higher score indicating more severe disease activity status. A negative change from baseline indicates improvement. |
Baseline, Week 12 |
|
Secondary |
Percentage of Participants Who Achieve SDAI = 11 at Week 12 |
SDAI is a composite measure that sums the TJC28, SJC28, SGA, PGA, and the hsCRP (in mg/dL). PGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no disease activity and maximum disease activity) and SGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no arthritis and extremely active arthritis). Higher score indicates more severe disease activity status and total possible score is 0 to 86. |
Week 12 |
|
Secondary |
Percentage of Participants Who Achieve CDAI = 10 at Week 12 |
CDAI is calculated using formula: CDAI = TJC based on 28 joints (TJC28) + SJC based on 28 joints (SJC28) + SGA + PGA. PGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no disease activity and maximum disease activity) and SGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no arthritis and extremely active arthritis). CDAI can range from 0 to 76, with higher score indicating more severe disease activity status. |
Week 12 |
|
Secondary |
Percentage of Participants Who Achieve DAS28(CRP) = 3.2 at Week 12 |
The DAS28(CRP) is a measure of the participant's disease activity calculated using the tender joint counts (28 joints), swollen joint counts (28 joints), SGA and hsCRP measurement for a total possible score of 1 to 9.4. Higher values indicate higher disease activity. |
Week 12 |
|
Secondary |
Change From Baseline in Health Assessment Questionnaire - Disability Index (HAQ-DI) Score at Week 12 |
The HAQ-DI is a 20-question instrument that assesses the degree of difficulty a person has in accomplishing tasks in 8 domains (dressing and grooming, arising, eating, walking, hygiene, reaching, gripping, and errands/chores). Responses are scored on a 4-point Likert scale from 0, indicating no difficulty, to 3, indicating inability to perform a task in that area. The need for aids or help from another person will also be recorded. The HAQ-DI total score ranges from 0 to 3 with higher scores indicating greater dysfunction. Negative change from baseline indicates improvement (less disability). |
Baseline, Week 12 |
|
Secondary |
Percentage of Participants Who Achieve SDAI = 3.3 at Week 12 |
SDAI is a composite measure that sums the TJC28, SJC28, SGA, PGA, and the hsCRP (in mg/dL). PGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no disease activity and maximum disease activity) and SGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no arthritis and extremely active arthritis). Higher score indicates more severe disease activity status and total possible score is 0 to 86. |
Week 12 |
|
Secondary |
Percentage of Participants Who Achieve CDAI = 2.8 at Week 12 |
CDAI is calculated using formula: CDAI = TJC based on 28 joints (TJC28) + SJC based on 28 joints (SJC28) + SGA + PGA. PGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no disease activity and maximum disease activity) and SGA assessed using VAS on a scale of 0-10 (0 and 10 indicating no arthritis and extremely active arthritis). CDAI can range from 0 to 76, with higher score indicating more severe disease activity status. |
Week 12 |
|
Secondary |
Percentage of Participants Who Achieve DAS28(CRP) < 2.6 at Week 12 |
The DAS28(CRP) is a measure of the participant's disease activity calculated using the tender joint counts (28 joints), swollen joint counts (28 joints), SGA, and hsCRP measurement for a total possible score of 1 to 9.4. Higher values indicate higher disease activity. |
Week 12 |
|
Secondary |
Pharmacokinetic (PK) Parameter: AUCtau of GS-5718 |
AUCtau is defined as the area under the curve from time zero to end of dosing interval. |
Up to Week 12 |
|
Secondary |
PK Parameter: AUCtau of Methotrexate (MTX) |
AUCtau is defined as the area under the curve from time zero to end of dosing interval. |
Up to Week 8 |
|
Secondary |
PK Parameter: Cmax of GS-5718 |
Cmax is defined as the maximum observed concentration of drug. |
Up to Week 12 |
|
Secondary |
PK Parameter: Cmax of MTX |
Cmax is defined as the maximum observed concentration of drug. |
Up to Week 8 |
|