Abstract
Background There is an ongoing controversy surrounding whether tofacitinib increases the risk of infections in patients with rheumatoid arthritis (RA). To address this issue, we conducted a meta-analysis using data from randomized clinical trials (RCTs) to assess the overall risk of infection in these patients. Methods We conducted a comprehensive systematic search in EMBASE, MEDLINE, and CENTRAL from their inception until December 2022 to identify relevant RCTs reporting the occurrence of infections in patients with RA who were treated with the standard clinical therapeutic dosage of tofacitinib (5mg twice daily orally). The primary outcomes of the included studies in this review focused on the incidence of total infections, serious infections, non-serious infections, and opportunistic infections (including herpes zoster and tuberculosis). Additionally, we examined secondary outcomes related to the incidence of various sites of infections, including the upper respiratory tract, lower respiratory tract, gastrointestinal tract, hepatobiliary system, urinary tract, skin and soft tissue, blood, dental and oral soft tissue, genital, reproductive tract, bone and joint, and central nervous system infections. Due to the expected anticipation of clinical and methodological heterogeneity across studies, the effect estimate was pooled with a random-effects model, to obtain the RRs and 95% CIs, using Mantel-Haenszel statistical method. Results Twelve eligible RCTs, involving a total of 6,056 patients, were included in the analysis. In comparison to the control group (placebo and other active treatments), tofacitinib exhibited a significant increase in the risk of total infections (RR, 1.21; 95% CI, 1.07-1.37; I2, 28%), serious infections (RR, 1.23; 95% CI, 1.02-1.48; I2, 0%), non-serious infections (RR, 1.20; 95% CI, 1.05-1.36; I2, 29%), and opportunistic infections (RR, 1.66; 95% CI, 1.40-1.97; I2, 0%). Secondary outcomes analyses revealed a significant increase in the risk of lower respiratory infections with tofacitinib (RR, 1.27; 95% CI, 1.10–1.47; I2, 0%). Conclusion Compared with placebo and other active treatments, tofacitinib significantly increased the overall risk of infections (total infections, serious infections, non-serious infections, and opportunistic infections). These findings can help clinicians assess the risk of infections in RA patients treated with tofacitinib.
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