Change from baseline in Work Productivity Survey – Rheumatoid Arthritis (WPS-RA) by American College of Rheumatology 20% improvement criteria (ACR20) clinical response at week 24. §P ≤ 0.001, **P < 0.01, *P ≤ 0.05 responders versus non-responders; P values were obtained using the non-parametric bootstrap-t method. Rate of interference is a score on a scale of 0 to 10 points (0 = no interference and 10 = complete interference). WPS-RA recall period is 1 month. BSL, baseline; RA, rheumatoid arthritis; WP, work productivity.