Real-world effectiveness and safety of rituximab in the treatment of rheumatoid arthritis: A single-center experience in Taiwan.

TLDR: To assess the real‐world effectiveness and safety of rituximab (RTX) at 24 months in patients with established rheumatoid arthritis (RA) and to identify predictors of low disease activity/remission and a good European League Against Rheumatism (EULAR) response.

Abstract: Aim To assess the real-world effectiveness and safety of rituximab (RTX) at 24 months in patients with established rheumatoid arthritis (RA) and to identify predictors of low disease activity/remission and a good European League Against Rheumatism (EULAR) response. Methods Seventy RTX-treated RA patients were enrolled. Predictors for low disease activity/remission and a good EULAR response at 24 months were identified by multivariate analyses. Results At 24 months, the mean Disease Activity Score of 28 joints-erythrocyte sedimentation rate (DAS28-ESR) decreased from 6.88 ± 0.85 at baseline to 3.47 ± 0.85. Twenty-nine patients (41.4%) reached low disease activity/remission, while all patients had a moderate/good EULAR response. After adjustment by multivariate analyses, we found concomitant methotrexate at a dosage >10 mg/week (odds ratio [OR] 5.17; 95% CI 1.34-19.93; P = 0.017) predicted low disease activity/remission, and baseline DAS28 ≤6.5 (OR 4.97; 95% CI 1.22-20.30; P = 0.026) predicted good EULAR response at 24 months. The most common adverse events were infusion-related (5.7%), and there was no incidence of malignancy or mortality during the treatment. Conclusions RTX was effective and safe in real-life management of RA patients with high disease activity. Patients taking concomitant methotrexate and with lower baseline DAS28-ESR were more likely to benefit from RTX.