216. BARICITINIB, METHOTREXATE, OR BARICITINIB PLUS METHOTREXATE IN PATIENTS WITH MODERATELY-TO-SEVERELY ACTIVE RHEUMATOID ARTHRITIS WHO HAD RECEIVED LIMITED OR NO TREATMENT WITH DMARDS: EFFICACY AND SAFETY RESULTS FROM THE 52-WEEK PHASE 3 RA-BEGIN STUDY

Background: Baricitinib, an oral JAK1/JAK2 inhibitor, improves disease activity with an acceptable safety profile in patients with active rheumatoid arthritis (RA). We report efficacy and safety data for baricitinib as monotherapy or in combination with methotrexate (MTX), compared with MTX, in[for full text, please go to the a.m. URL]