A Randomized, Double-Blind, Placebo-Controlled, Dose-Ranging, Parallel-Group, Phase 2 Study of Baricitinib (LY3009104) in Japanese Patients With Active Rheumatoid Arthritis on Background Methotrexate Therapy

This is a Phase 2b, outpatient, randomized, double-blinded (with a single-blind extension), placebo-controlled, dose-ranging, parallel-group study of baricitinib (LY3009104) in Japanese participants with active rheumatoid arthritis (RA) on background methotrexate (MTX) therapy. Baricitinib will be orally administered once a day with background methotrexate [6 to 16 milligrams (mg)/week] therapy for 12 weeks in the double-blind treatment period (1, 2, 4 or 8 mg/day, or placebo), and for 52 weeks in the single-blind extension period (4 or 8 mg/day).