Impact of Concomitant Methotrexate Use and Prior Biologic Disease‐Modifying Antirheumatic Drug Exposure on Tofacitinib Efficacy and Safety in Patients with Polyarticular Course Juvenile Idiopathic Arthritis: Post Hoc Analysis of a Phase 3 Randomized Withdrawal Trial

Tofacitinib was efficacious for patients regardless of baseline concomitant MTX treatment or prior bDMARD exposure; MTX may have a protective effect for flare upon tofacitinib withdrawal. Safety was consistent with the known tofacitinib profile, and no new risks were identified in these subgroups.