| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Moderately to Severely Active Rheumatoid Arthritis (RA) |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Rheumatoid Arthritis (RA) |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Immune System Diseases [C20] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 19.0 |  
| E.1.2 | Level | PT |  
| E.1.2 | Classification code | 10039073 |  
| E.1.2 | Term | Rheumatoid arthritis |  
| E.1.2 | System Organ Class | 10028395 - Musculoskeletal and connective tissue disorders |  | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| • To compare the efficacy of ABT-494 QD versus placebo, and versus adalimumab (ADA) for the treatment of signs and symptoms of rheumatoid arthritis (RA) in subjects with moderately to severely active RA who are on a on a stable background of methotrexate (MTX) and who have an inadequate response to MTX (MTX-IR). • To compare the efficacy of ABT-494 QD versus placebo for the prevention of structural progression in RA subjects with moderately to severely active RA who are on a on a stable background of MTX and who have an inadequate response to MTX (MTX-IR).
 • To compare the safety and tolerability of ABT-494 QD versus placebo, and versus ADA in subjects with moderately to severely active RA subjects who are on a stable background of MTX and who have an inadequate response to MTX (MTX-IR).
 • To evaluate the long-term safety, tolerability, and efficacy of ABT-494 in subjects with RA.
 |  | 
| E.2.2 | Secondary objectives of the trial |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| • Adult male or female, at least 18 years old. • Diagnosis of RA for ≥ 3 months.
 • Subjects must have been on oral or parenteral MTX therapy ≥ 3 months prior to the first dose of study drug.
 • At least one of the following at Screening:  ≥ 3 bone erosions on x-ray OR ≥ 1 bone erosion and a positive rheumatoid factor OR ≥ 1 bone erosion and a positive anti-cyclic citrullinated peptide autoantibodies.
 • Subjects with prior exposure to at most one bDMARD (except ADA) may be enrolled (up to 20% of total study population)
 • Except for MTX, subject must have discontinued all conventional synthetic disease-modifying anti-rheumatic drugs (csDMARDs).
 
 |  | 
| E.4 | Principal exclusion criteria | 
| • Prior exposure to any Janus kinase (JAK) inhibitor (including but not limited to tofacitinib, baricitinib, and filgotinib). • History of inflammatory joint disease other than RA. History of secondary Sjogren's Syndrome is permitted.
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The primary endpoint is the proportion of subjects achieving ACR20 response at Week 12 / the proportion of subjects achieving clinical remission (CR) based on DAS28 (CRP) at Week 12 |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| E.5.2 | Secondary end point(s) | 
| • Change from baseline in modified Total Sharp Score (mTSS) at Week 26 • Proportion of subjects achieving LDA at Week 12
 • Change from baseline in Disease Activity Score (DAS) 28(CRP) at Week 12
 • Change from baseline in Health Assessment Questionnaire (HAQ-DI) at Week 12
 • ACR50 response at Week 12
 • ACR70 response at Week 12
 • Proportion of subjects achieving LDA based on DAS28 (CRP) ≤ 3.2 at Week 12
 • Change from baseline in Short Form 36 (SF-36) PCS at Week 12
 • Change from baseline in Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F) at Week 12
 • Proportion of subjects with no radiographic progression at Week 26
 • Change from baseline in Work Stability Scale for Rheumatoid Arthritis (RA-WIS) at Week 12
 • Change from baseline in morning stiffness (severity) at Week 12
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | No | 
| E.6.4 | Safety | Yes | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | Yes | 
| E.6.7 | Pharmacodynamic | Yes | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | Yes | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | Yes | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | No | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | Yes | 
| E.8.1.5 | Parallel group | Yes | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | Yes | 
| E.8.2.2 | Placebo | Yes | 
| E.8.2.3 | Other | No | 
| E.8.2.4 | Number of treatment arms in the trial | 3 | 
| E.8.3 | The trial involves single site in the Member State concerned | Yes | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | No | 
| E.8.5 | The trial involves multiple Member States | Yes | 
| E.8.5.1 | Number of sites anticipated in the EEA | 115 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | Yes | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Argentina |  
| Australia |  
| Belarus |  
| Bosnia and Herzegovina |  
| Brazil |  
| Canada |  
| Chile |  
| Colombia |  
| Egypt |  
| European Union |  
| Hong Kong |  
| Israel |  
| Kazakhstan |  
| Korea, Republic of |  
| Malaysia |  
| Mexico |  
| New Zealand |  
| Puerto Rico |  
| Russian Federation |  
| Serbia |  
| Singapore |  
| South Africa |  
| Taiwan |  
| Turkey |  
| Ukraine |  
| United States |  | 
| E.8.7 | Trial has a data monitoring committee | Yes | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial | 
| LVLS or last follow up contact whichever is later |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 6 | 
| E.8.9.1 | In the Member State concerned months |  | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 6 |