This is a Phase 3 multicenter study with 2 periods. Period 1 was a 24-week, randomized, double-blind, parallel-group, active-controlled period designed to compare the safety and efficacy of upadacitinib 15 mg and abatacept for the treatment of signs and symptoms of participants with moderately to severely active rheumatoid RA who had an inadequate response to or intolerance to bDMARD therapy and were currently on a stable dose of csDMARD(s) and had never received abatacept. Period 2 is an open-label, long-term extension study to evaluate the long-term safety, tolerability, and efficacy of upadacitinib 15 mg once a day (QD) in participants with RA who had completed Period 1.
The study objective of Period 1 was to compare the safety and efficacy of upadacitinib 15 mg once daily (QD) to abatacept on a background of conventional synthetic disease-modifying antirheumatic drugs (csDMARDs) for the treatment of signs and symptoms of rheumatoid arthritis (RA) in biologic disease-modifying antirheumatic drug (bDMARD)-inadequate response or bDMARD-intolerant participants with moderately to severely active RA. The study objective of Period 2 is to evaluate the long-term safety, tolerability, and efficacy of upadacitinib 15 mg QD in participants with RA who had completed Period 1.