Radiographic progression of structural joint damage over 5 years of baricitinib treatment in patients with rheumatoid arthritis: Results from RA-BEYOND
Abstract
Objective To evaluate the effect of baricitinib on inhibiting radiographic progression of structural joint damage over 5 years in patients with active rheumatoid arthritis (RA).
Methods Patients completed 1 of 3 phase 3 baricitinib trials (NCT01711359, NCT01710358, NCT01721057) and entered the long-term extension RA-BEYOND (NCT01885078), in which patients received once-daily 4 mg or 2 mg baricitinib. Across these trials, patients initially receiving methotrexate (MTX) or adalimumab switched to baricitinib 4 mg at week 52. Patients initially receiving placebo switched to baricitinib 4 mg at week 24. Radiographs were scored at baseline and years 2, 3, 4, and 5. Change from baseline in van der Heijde modified Total Sharp Score (ΔmTSS) was computed.
Results Overall, 2125/2573 (82.6%) randomized patients entered RA-BEYOND; 1837/2125 (86.4%) entered this analysis. From years 3 to 5, higher proportions of DMARD-naïve patients on initial baricitinib (monotherapy; +MTX) had no progression versus initial MTX (ΔmTSS≤0, year 5: 59.6% baricitinib 4 mg; 66.2% baricitinib 4 mg+MTX; 40.7% MTX). Higher proportions of patients with inadequate response (IR) to MTX on initial baricitinib or adalimumab versus placebo had no progression (ΔmTSS≤0, year 5: 54.8% baricitinib 4 mg; 55.0% adalimumab; 50.3% placebo). Higher proportions of patients with conventional synthetic (cs)DMARD-IR on initial baricitinib 4 mg had less progression versus initial placebo or baricitinib 2 mg (ΔmTSS≤0, year 5: 66.7% baricitinib 4 mg; 58.2% baricitinib 2 mg; 60.0% placebo).
Conclusion Oral baricitinib maintained lower levels of radiographic progression than initial csDMARD or placebo through 5 years in patients with active RA.