Safety and Efficacy Study of GDC-0853 Compared With Placebo and Adalimumab in Participants With Rheumatoid Arthritis (RA)

Study Overview
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Brief Summary
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This is a multicenter, Phase II, randomized, double-blind, placebo-controlled, active comparator (Cohort 1 only), parallel-group, dose-ranging study to evaluate the efficacy and safety of GDC-0853 in participants with moderate to severe active RA and an inadequate response to previous methotrexate (MTX) therapy (Cohort 1) or MTX and tumor necrosis factor (TNF) therapy who may have also had exposure to no more than one non-TNF inhibitor biologic (Cohort 2).

Official Title
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A Two-Cohort Randomized Phase II, Double-Blind, Parallel Group Study in Patients With Active Rheumatoid Arthritis Evaluating the Efficacy and Safety of GDC-0853 Compared With Placebo and Adalimumab in Patients With an Inadequate Response to Previous Methotrexate Therapy (Cohort 1) and Compared With Placebo in Patients With an Inadequate Response or Intolerance to Previous TNF Therapy (Cohort 2)

Conditions
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Rheumatoid Arthritis

Intervention / Treatment
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* Drug: GDC-0853
* Drug: Adalimumab
* Drug: Folic Acid
* Drug: MTX
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Have a diagnosis of adult-onset RA as defined by the 2010 American College of Rheumatology/European League Against Rheumatism Classification Criteria for RA RA disease activity by joint counts and laboratory markers of inflammation: greater than or equal to (>=) 6 tender/painful joints on motion (68 joint count) and >= 6 swollen joints (66 joint count) at both screening and Day 1 (randomization) For MTX-inadequate response (IR) participants: must have had an inadequate response to MTX For TNF-IR participants: must have had an inadequate response or intolerance to previous treatment with at least 1 and no more than 2 biologic TNF-alpha inhibitors and may have also been exposed to no more than one biologic non-TNF-alpha inhibitor High sensitivity C-reactive protein of >= 0.400 milligrams per deciliter (mg/dL) for Cohort 1 and >= 0.650 mg/dL for Cohort 2 at screening Exclusion Criteria: History of or current inflammatory joint disease other than RA or other systemic autoimmune disorder For MTX-IR participants: History of treatment with any TNF inhibitor, including biosimilar equivalents and history of treatment with biologic non-TNF-alpha inhibitor for RA For all participants: Previous treatment with cell-depleting therapy including B cell-depleting therapy (e.g., anti-cluster of differentiation 20-directed therapy such as rituximab), tofacitinib, or other Janus kinase inhibitor(s), or alkylating agents Current treatment with medications that are well known to prolong the QT interval at doses that have a clinically meaningful effect on QT History of non-gallstone-related pancreatitis or chronic pancreatitis Evidence of serious uncontrolled concomitant cardiac, neurologic, pulmonary, renal, hepatic, endocrine, metabolic, or gastrointestinal disease Evidence of chronic and/or active hepatitis B or C Women who are pregnant, nursing (breast feeding), or intending to become pregnant during the study or within 60 days after completion of the study

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 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: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cohort 1: GDC-0853 High Dose + Adalimumab Placebo<br>Participants of Cohort 1 will receive GDC-0853 high dose, orally once daily along with placebo matched to adalimumab, subcutaneously every 2 weeks (Q2W) starting on Day 1 for 12 weeks. Participants will remain on a stable background therapy of MTX 15-25 milligrams per week (mg/week) (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines) and folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion. | Drug: GDC-0853<br>* Participants will receive GDC-0853 at low, mid, or high doses, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>* Other names: RO7010939;Drug: Folic Acid<br>* Participants will receive stable background therapy of folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion.<br>Drug: MTX<br>* Participants will receive stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines).<br>Drug: Placebo<br>* Participants will receive placebo matched to adalimumab, subcutaneously Q2W and/or placebo matched to GDC-0853, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>|
| Experimental: Cohort 1: GDC-0853 Low Dose + Adalimumab Placebo<br>Participants of Cohort 1 will receive GDC-0853 low dose, orally once daily along with placebo matched to adalimumab, subcutaneously Q2W starting on Day 1 for 12 weeks. Participants will remain on a stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines) and folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion. | Drug: GDC-0853<br>* Participants will receive GDC-0853 at low, mid, or high doses, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>* Other names: RO7010939;Drug: Folic Acid<br>* Participants will receive stable background therapy of folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion.<br>Drug: MTX<br>* Participants will receive stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines).<br>Drug: Placebo<br>* Participants will receive placebo matched to adalimumab, subcutaneously Q2W and/or placebo matched to GDC-0853, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>|
| Experimental: Cohort 1: GDC-0853 Mid Dose + Adalimumab Placebo<br>Participants of Cohort 1 will receive GDC-0853 mid dose, orally twice daily along with placebo matched to adalimumab, subcutaneously Q2W starting on Day 1 for 12 weeks. Participants will remain on a stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines) and folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion. | Drug: GDC-0853<br>* Participants will receive GDC-0853 at low, mid, or high doses, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>* Other names: RO7010939;Drug: Folic Acid<br>* Participants will receive stable background therapy of folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion.<br>Drug: MTX<br>* Participants will receive stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines).<br>Drug: Placebo<br>* Participants will receive placebo matched to adalimumab, subcutaneously Q2W and/or placebo matched to GDC-0853, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>|
| Active Comparator: Cohort 1: GDC-0853 Placebo + Adalimumab<br>Participants of Cohort 1 will receive placebo matched to GDC-0853, orally once daily along with adalimumab, subcutaneously Q2W starting on Day 1 for 12 weeks. Participants will remain on a stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines) and folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion. | Drug: Adalimumab<br>* Participants will receive adalimumab, subcutaneously Q2W starting on Day 1 for 12 weeks.<br>Drug: Folic Acid<br>* Participants will receive stable background therapy of folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion.<br>Drug: MTX<br>* Participants will receive stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines).<br>Drug: Placebo<br>* Participants will receive placebo matched to adalimumab, subcutaneously Q2W and/or placebo matched to GDC-0853, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>|
| Placebo Comparator: Cohort 1: GDC-0853 Placebo + Adalimumab Placebo<br>Participants of Cohort 1 will receive placebo matched to GDC-0853, orally once daily along with placebo matched to adalimumab, subcutaneously Q2W starting on Day 1 for 12 weeks. Participants will remain on a stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines) and folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion. | Drug: Folic Acid<br>* Participants will receive stable background therapy of folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion.<br>Drug: MTX<br>* Participants will receive stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines).<br>Drug: Placebo<br>* Participants will receive placebo matched to adalimumab, subcutaneously Q2W and/or placebo matched to GDC-0853, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>|
| Experimental: Cohort 2: GDC-0853 High Dose<br>Participants of Cohort 2 will receive GDC-0853 high dose, orally twice daily for 12 weeks. Participants will remain on a stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines) and folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion. | Drug: GDC-0853<br>* Participants will receive GDC-0853 at low, mid, or high doses, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>* Other names: RO7010939;Drug: Folic Acid<br>* Participants will receive stable background therapy of folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion.<br>Drug: MTX<br>* Participants will receive stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines).<br>|
| Placebo Comparator: Cohort 2: GDC-0853 Placebo<br>Participants of Cohort 2 will receive placebo matched to GDC-0853, orally twice daily for 12 weeks. Participants will remain on a stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines) and folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion. | Drug: Folic Acid<br>* Participants will receive stable background therapy of folic acid of at least 5 mg total dose weekly (or equivalent) as per investigator's discretion.<br>Drug: MTX<br>* Participants will receive stable background therapy of MTX 15-25 mg/week (oral or parenteral; for participants entering the trial on MTX doses 15 mg/week, doses as low as 7.5 mg/week are allowed only if there is clear documentation in the medical record that higher doses were not tolerated or that the dose of MTX is the highest acceptable dose based on local clinical practice guidelines).<br>Drug: Placebo<br>* Participants will receive placebo matched to adalimumab, subcutaneously Q2W and/or placebo matched to GDC-0853, orally once or twice daily for 12 weeks in Cohort 1 or 2.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Participants Achieving American College of Rheumatology 50% (ACR50) Response at Day 84, Comparison Between GDC-0853 and Placebo (Cohort 1) | ACR50 response is defined as a ≥ 50% improvement (reduction) compared with baseline for both total joint count-68 joints (TJC68) and swollen joint count-66 joints (SJC66), as well as for three of the additional five ACR core set variables: Patient's Assessment of Pain over the previous 24 hours: using a Visual Analog Scale (VAS) left end of the line 0=no pain to right end of the line 100=unbearable pain; Patient's Global Assessment of Disease Activity and Physician's Global Assessment of Disease Activity over the previous 24 hours using a VAS where left end of the line 0=no disease activity to right end of the line 100=maximum disease activity; Health Assessment Questionnaire: 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities, 0=without difficulty to 3=unable to do; and acute-phase reactant [either C-reactive protein or Erythrocyte Sedimentation Rate]. | Day 84 | 
| Percentage of Participants With Adverse Events | An Adverse event was considered any unfavorable and unintended sign, symptom, or disease associated with the use of the study drug, whether or not considered related to the study drug. Preexisting conditions that worsened during the study were reported as adverse events. A SAE was any experience that suggested a significant hazard, contraindication, side effect or precaution that: resulted in death, was life-threatening, required in-patient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect or was medically significant. | Day 1 up to 8 weeks after last dose (up to Week 20) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Participants Achieving ACR50 Response at Day 84, Comparison Between GDC-0853 and Adalimumab (Cohort 1) | ACR50 response is defined as a ≥ 50% improvement (reduction) compared with baseline for both total joint count-68 joints (TJC68) and swollen joint count-66 joints (SJC66), as well as for three of the additional five ACR core set variables: Patient's Assessment of Pain over the previous 24 hours: using a Visual Analog Scale (VAS) left end of the line 0=no pain to right end of the line 100=unbearable pain; Patient's Global Assessment of Disease Activity and Physician's Global Assessment of Disease Activity over the previous 24 hours using a VAS where left end of the line 0=no disease activity to right end of the line 100=maximum disease activity; Health Assessment Questionnaire: 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities, 0=without difficulty to 3=unable to do; and acute-phase reactant [either C-reactive protein or Erythrocyte Sedimentation Rate]. | Day 84 | 
| Percentage of Participants Achieving ACR50 Response at Day 84, Comparison Between GDC-0853 and Placebo (Cohort 2) | ACR50 response is defined as a ≥ 50% improvement (reduction) compared with baseline for both total joint count-68 joints (TJC68) and swollen joint count-66 joints (SJC66), as well as for three of the additional five ACR core set variables: Patient's Assessment of Pain over the previous 24 hours: using a Visual Analog Scale (VAS) left end of the line 0=no pain to right end of the line 100=unbearable pain; Patient's Global Assessment of Disease Activity and Physician's Global Assessment of Disease Activity over the previous 24 hours using a VAS where left end of the line 0=no disease activity to right end of the line 100=maximum disease activity; Health Assessment Questionnaire: 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities, 0=without difficulty to 3=unable to do; and acute-phase reactant [either C-reactive protein or Erythrocyte Sedimentation Rate]. | Day 84 | 
| Percentage of Participants Achieving American College of Rheumatology 20% (ACR20) Response | ACR20 response is defined as a ≥ 20% improvement (reduction) compared with baseline for both total joint count-68 joints (TJC68) and swollen joint count-66 joints (SJC66), as well as for three of the additional five ACR core set variables: Patient's Assessment of Pain over the previous 24 hours: using a Visual Analog Scale (VAS) left end of the line 0=no pain to right end of the line 100=unbearable pain; Patient's Global Assessment of Disease Activity and Physician's Global Assessment of Disease Activity over the previous 24 hours using a VAS where left end of the line 0=no disease activity to right end of the line 100=maximum disease activity; Health Assessment Questionnaire: 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities, 0=without difficulty to 3=unable to do; and acute-phase reactant [either C-reactive protein or Erythrocyte Sedimentation Rate] | Days 7, 14, 28, 56, and 84 | 
| Percentage of Participants Achieving American College of Rheumatology 50% (ACR50) Response | ACR50 response is defined as a ≥ 50% improvement (reduction) compared with baseline for both total joint count-68 joints (TJC68) and swollen joint count-66 joints (SJC66), as well as for three of the additional five ACR core set variables: Patient's Assessment of Pain over the previous 24 hours: using a Visual Analog Scale (VAS) left end of the line 0=no pain to right end of the line 100=unbearable pain; Patient's Global Assessment of Disease Activity and Physician's Global Assessment of Disease Activity over the previous 24 hours using a VAS where left end of the line 0=no disease activity to right end of the line 100=maximum disease activity; Health Assessment Questionnaire: 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities, 0=without difficulty to 3=unable to do; and acute-phase reactant [either C-reactive protein or Erythrocyte Sedimentation Rate]. | Days 7, 14, 28, 56, and 84 | 
| Percentage of Participants Achieving American College of Rheumatology 70% (ACR70) Response | ACR70 response is defined as a ≥ 70% improvement (reduction) compared with Baseline for both total joint count-68 joints (TJC68) and swollen joint count-66 joints (SJC66), as well as for three of the additional five ACR core set variables: Patient's Assessment of Pain over the previous 24 hours: using a Visual Analog Scale (VAS) left end of the line 0=no pain to right end of the line 100=unbearable pain; Patient's Global Assessment of Disease Activity and Physician's Global Assessment of Disease Activity over the previous 24 hours using a VAS where left end of the line 0=no disease activity to right end of the line 100=maximum disease activity; Health Assessment Questionnaire: 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities, 0=without difficulty to 3=unable to do; and acute-phase reactant [either C-reactive protein or Erythrocyte Sedimentation Rate]. | Days 7, 14, 28, 56, and 84 | 
| Change in Disease Activity Score From Baseline Based on 28-Joints Count and C-Reactive Protein (3 Variables) (DAS28-3 [CRP]) | The DAS28 score is a measure of the patient's disease activity calculated using the tender joint count (TJC) [28 joints], swollen joint count (SJC) [28 joints], patient's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the erythrocyte sedimentation rate (ESR) for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. DAS28 Remission is defined as a DAS28 score < 2.6. | Days 7, 14, 28, 56, and 84 | 
| Change in Disease Activity Score From Baseline Based on 28-Joints Count and C-Reactive Protein (4 Variables) (DAS28-4 [CRP]) | The DAS28 score is a measure of the patient's disease activity calculated using the tender joint count (TJC) [28 joints], swollen joint count (SJC) [28 joints], patient's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the erythrocyte sedimentation rate (ESR) for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. DAS28 Remission is defined as a DAS28 score < 2.6. | Days 7, 14, 28, 56, and 84 | 
| Change in Disease Activity Score From Baseline Based on 28-Joints Count and Erythrocyte Sedimentation Rate (3 Variables) (DAS28-3 [ESR]) | The DAS28 score is a measure of the patient's disease activity calculated using the tender joint count (TJC) [28 joints], swollen joint count (SJC) [28 joints], patient's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the erythrocyte sedimentation rate (ESR) for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. DAS28 Remission is defined as a DAS28 score < 2.6. | Days 7, 14, 28, 56, and 84 | 
| Change in Disease Activity Score From Baseline Based on 28-Joints Count and Erythrocyte Sedimentation Rate (4 Variables) (DAS28-4 [ESR]) | The DAS28 score is a measure of the patient's disease activity calculated using the tender joint count (TJC) [28 joints], swollen joint count (SJC) [28 joints], patient's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the erythrocyte sedimentation rate (ESR) for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. DAS28 Remission is defined as a DAS28 score < 2.6. | Days 7, 14, 28, 56, and 84 | 
| Percentage of Participants With DAS Low Disease Activity | The DAS28 score is a measure of the patient's disease activity calculated using the tender joint count (TJC) [28 joints], swollen joint count (SJC) [28 joints], patient's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the erythrocyte sedimentation rate (ESR) for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. LDAS is defined as DAS28 ≤ 3.2 | Days 7, 14, 28, 56, and 84 | 
| Percentage of Participants With DAS Remission | The DAS28 score is a measure of the patient's disease activity calculated using the tender joint count (TJC) [28 joints], swollen joint count (SJC) [28 joints], patient's global assessment of disease activity [visual analog scale: 0=no disease activity to 100=maximum disease activity] and the erythrocyte sedimentation rate (ESR) for a total possible score of 0 to approximately 10. Scores below 2.6 indicate best disease control and scores above 5.1 indicate worse disease control. DAS28 Remission is defined as a DAS28 score < 2.6 | Days 7, 14, 28, 56, and 84 | 
| Percentage of Participants Meeting the Boolean-based Remission Criteria | Boolean Remission is defined as Tender joint count less than 1, Swollen joint count less than 1, CRP less than 1 mg/dL, patient global assessment less than 1 (on 0 to 10 VAS scale). | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in Clinical Disease Activity Index (CDAI) | CDAI was derived as the sum of the following: tender joint count (TJC), swollen joint count (SJC), participant global assessment (PGA) of disease activity, and physician assessment of disease activity. TJC and SJC were taken as the number of tender and swollen joints, respectively, out of 28 assessed joints. PGA and physician assessment of disease activity were scored 0-100 millimeters (mm) and rounded to the nearest centimeter (cm) on a visual analog scale (VAS), where higher scores indicate greater perceived disease activity. The total CDAI score range was 0-76, where higher scores indicate increased disease activity. Change from baseline at a particular time point was calculated among patients with data available at both baseline and the time point of interest. Negative values indicate improvement/reduction in RA disease activity. | Baseline, Days 7, 14, 28, 56 and 84 | 
| Percentage of Participants Meeting the CDAI-based Remission Criteria | Clinical Disease Activity Index is defined as CDAI= : SJC(28) + TJC(28) + PGA + MDG where TJC and SJC are the tender and swollen joint counts from 28 joints, PGA is the patient's global assessment of disease activity (on a 0-10 scale) and MDG is physician global assessment of disease activity (on a 0-10 scale). The cutoff value for CDAI remission is <=2.8. | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in Simplified Disease Activity Index (SDAI) | Simplified Disease Activity Index (SDAI) is the numerical sum of five outcome parameters: TJC and SJC (based on a 28-joint assessment), PtGA and PhGA (based on 0-10 cm VAS, where 0 = no disease activity and 10 = worst disease activity), and CRP. SDAI total score ranges from 0 (no disease activity) to 86 (maximal disease activity), where higher scores represents higher disease activity. The SDAI =< 3.3 indicates disease remission, > 3.4 to 11 indicates low disease activity, > 11 to 26 indicates moderate disease activity, and > 26 indicates high disease activity | Baseline, Days 7, 14, 28, 56 and 84 | 
| Percentage of Participants Meeting the SDAI-based Remission Criteria | The SDAI was the numerical sum of five outcome parameter: SJC and TJC (based on a 28-joint assessment), PGA and MDG (based on 0-10 cm VAS, where 0 = no disease activity and 10 = worst disease activity), and CRP. The SDAI =< 3.3 indicates disease remission | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in 36-Item Short-Form Health Survey (SF-36) Version 2.0 (V2) Scores for Physical and Mental Components | The 36-Item Short Form Health Survey (SF-36v2) is a questionnaire used to assess functional health and well-being and consists of eight domains: Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional and Mental Health. The SF-36v2 is summarized into Physical Component Summary (PCS) and Mental Component Summary (MCS) scores. The PCS and MCS scores range from 0 to 100, with 0=worst score (or quality of life) and 100=best score. A positive change from baseline indicates improvement. | Day 84 | 
| Change From Baseline in Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F) Score | The FACIT-Fatigue Scale consists of 13 items designed to measure the degree of fatigue experienced by the patient in the previous 7 days. For each question, there are five possible responses: 0 (not at all), 1 (a little bit), 2 (somewhat), 3 (quite a bit), 4 (very much). A total fatigue score is calculated by summing all items, and possible total scores range from 0 (maximum fatigue) to 52 (no fatigue). A positive change from baseline indicates an improvement in the patient's fatigue (less fatigue). | Day 84 | 
| Change From Baseline in Tender/Painful Joint Count (68 Joint Count) | Tender Joint Count: a total of 68 joints will be assessed for tenderness. Each joint is assessed for the presence/absence of tenderness. 68 joints are assessed for tenderness and joints are classified as tender/not tender giving a total possible tender joint count score of 0 to 68. A negative change from Baseline indicated improvement. | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in Swollen Joint Count (66 Joint Count) | Swollen Joint Count: a total of 66 joints will be assessed for swelling. Each joint is assessed for the presence/absence of swelling. 66 joints were assessed for swelling and joints are classified as swollen/not swollen giving a total possible swollen joint count score of 0 to 66. A negative change from Baseline indicated improvement. | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in Patient Assessment Score of Arthritis Pain | Patient's Assessment of Pain over the previous 24 hours: using a Visual Analog Scale (VAS) left end of the line 0=no pain to right end of the line 100=unbearable pain | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in Patient Global Assessment Score of Arthritis Pain | Participant-assessed arthritis pain was scored on a 100-mm VAS, where the distance from 0 mm represented the participant's self evaluation of arthritis pain (0 mm=none; 100 mm=very severe). Change from baseline at a particular time point was calculated among patients with data available at both baseline and the time point of interest, where negative change indicated a decrease in participant-assessed arthritis pain. | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in Physician's Global Assessment Score of Arthritis | Physician's assessment of participant's disease activity was scored on a 100-mm VAS, where the distance from 0 mm represented the physician's assessment of the participant's disease activity (0 mm=very good; 100 mm=very poor). Change from baseline at a particular time point was calculated among patients with data available at both baseline and the time point of interest, where negative change from baseline indicated an improvement in physician-assessed disease activity. | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in C-Reactive Protein (CRP) Levels | C-reactive protein is a biological marker of inflammation and is measured in nanograms per milliliter (ng/mL) | Days 7, 14, 28, 56, and 84 | 
| Change From Baseline in Health Assessment Questionnaire-Disability Index (HAQ-DI) Score | The Stanford Health Assessment Questionnaire disability index is a patient-reported outcome used to assess difficulty in performing activities of daily living. It consists of 20 questions referring to eight domains: dressing/grooming, arising, eating, walking, hygiene, reach, grip and common daily activities. To respond to each question, a four-level response with higher scores showing larger functional limitations, was chosen. Scoring is as follows with respect to performance of participant's everyday activities: 0 (equals)=without difficulties; 1= with some difficulties; 2=with great difficulties; and 3=unable to perform these actions at all. The composite HAQ-DI score is the mean of the eight domain scores and the score ranges from 0 (no functional impairment) to 3 (maximum functional impairment). A negative change from baseline indicates improvement. | Days 7, 14, 28, 56, and 84 | 
| Area Under the Concentration Time Curve From Time 0 to Time 24 of GDC-0853 at Steady State (AUC0-24,ss) | The Pharmacokinetics (PK) evaluation may include, but will not be limited to, plasma GDC-0853 concentrations and population PK model estimated PK exposures (area under the plasma concentration-time curve [AUC]. AUC was measured in Nanograms(ng) per millilitre(mL)*hour (hr) | Pre-dose (0 hours) up to 10 hours post-dose on Day 28 | 
| Maximum Observed Plasma Concentration of GDC-0853 at Steady State (Cmax,ss) | Cmax is the maximum (peak) plasma concentration over the dosing interval at steady state (ss) | Pre-dose (0 hours) up to 10 hours post-dose on Day 28 | 
| Minimum Observed Plasma Concentration of GDC-0853 at Steady State (Cmin,ss) | Cmin is the minimum concentration over the dosing interval at steady state (ss) | Pre-dose (0 hours) up to 10 hours post-dose on Day 28 |