Objective: To assess the incidence of major adverse cardiovascular events (MACE) in RA patients treated with JAKi, TNF-inhibitors (TNFi) or biologic Disease-Modifying Anti-Rheumatic Drugs with other modes of action (bDMARD-OMA) in a multi-country, real-world population. Methods: RA patients from 15 registries in the JAK-pot collaboration were included. MACE incidence was analysed using two approaches: a within-registry analysis aggregating country-specific estimates from registers with >25 incident MACE events through meta-analysis, and an individual-level data combined analysis. We used adjusted linear mixed Poisson regression to obtain incidence rate ratios (IRR) of MACE between treatment groups, accounting for multiple treatment courses. Results: The study included 73'008 treatment courses (16'417 JAKi, 35'373 TNFi and 21'218 bDMARD-OMA) and 828 incident MACE among 51'233 patients. Median follow-up time was 1.3 years, with most of the follow-up concentrated in the first two years of

DiRROS repository (University of Maribor) 2026 Open access