Patients With Psoriatic Arthritis-Related Enthesitis and Persistence on Tofacitinib Under Real-World Conditions.

Abstract

Information on the persistence of tofacitinib (TOF) in psoriatic arthritis (PsA) is scarce in real-world conditions. Our objective was to analyze the persistence and safety of TOF under these conditions. This was a single-center retrospective longitudinal observational study of all patients with PsA who received at least 1 dose of TOF. The main focus was on adverse events (AEs) and drug survival. Drug survival was analyzed by Kaplan-Meier curves and persistence explanatory factors by multivariate Cox regression models. The hazard ratio (HR) was used to measure association. Seventy-two patients were included, 54 women and 18 men, mean age 51.9 (SD 11.1) years, mean disease duration of 10.4 (SD 6.99) years. TOF was ≥ third line of therapy in > 70% of cases. The median survival was 13.0 (IQR 5.3-29.0) months. One-year retention rate was 52.7% (95% CI 42.4-65.6). TOF survival was not influenced by sex, disease duration, comorbidities, or line of treatment. Younger patients (HR 0.96, <i>P</i> = 0.01) and those with enthesitis (HR 0.37, <i>P</i> = 0.03) showed lower odds of drug discontinuation. The overall rate of AEs was 52.9 (95% CI 38.5-70.6)/100 person-years. Most AEs occurred during the first 6 months of exposure. In this real-world study, TOF showed a reasonably good retention rate in a PsA population that was mostly refractory to biologic and oral targeted synthetic disease-modifying antirheumatic drugs. There were no new causes for concern regarding safety. Patients with refractory PsA and enthesitis might be a specific target population for this drug.