Rivaroxaban Versus Vitamin K Antagonist in Antiphospholipid Syndrome: A Randomized Noninferiority Trial.

Background: The potential role of new oral anticoagulants in antiphospholipid antibody syndrome (APS) remains uncertain. Objective: To determine whether rivaroxaban is noninferior to dose-adjusted vitamin K antagonists (VKAs) for thrombotic APS. Design: 3-year, open-label, randomized noninferiority trial. (EU Clinical Trials Register: EUDRA [European Union Drug Regulatory Authorities] code 2010-019764-36). Setting: 6 university hospitals in Spain. Participants: 190 adults (aged 18 to 75 years) with thrombotic APS. Intervention: Rivaroxaban (20 mg/d or 15 mg/d, according to renal function) versus dose-adjusted VKAs (target international normalized ratio, 2.0 to 3.0, or 3.1 to 4.0 in patients with a history of recurrent thrombosis). Measurements: The primary efficacy outcome was the proportion of patients with new thrombotic events; the primary safety outcome was major bleeding. The prespecified noninferiority margin for risk ratio (RR) was 1.40. Secondary outcomes included time to thrombosis, type of thrombosis, changes in biomarker levels, cardiovascular death, and nonmajor bleeding. Results: After 3 years of follow-up, recurrent thrombosis occurred in 11 patients (11.6%) in the rivaroxaban group and 6 (6.3%) in the VKA group (RR in the rivaroxaban group, 1.83 [95% CI, 0.71 to 4.76]). Stroke occurred more commonly in patients receiving rivaroxaban (9 events) than in those receiving VKAs (0 events) (corrected RR, 19.00 [CI, 1.12 to 321.9]). Major bleeding occurred in 6 patients (6.3%) in the rivaroxaban group and 7 (7.4%) in the VKA group (RR, 0.86 [CI, 0.30 to 2.46]). Post hoc analysis suggested an increased risk for recurrent thrombosis in rivaroxaban-treated patients with previous arterial thrombosis, livedo racemosa, or APS-related cardiac valvular disease. Limitation: Anticoagulation intensity was not measured in the rivaroxaban group. Conclusion: Rivaroxaban did not show noninferiority to dose-adjusted VKAs for thrombotic APS and, in fact, showed a non-statistically significant near doubling of the risk for recurrent thrombosis. Primary Funding Source: Bayer Hispania.

Enteric-coated mycophenolate sodium versus azathioprine in patients with active systemic lupus erythematosus: a randomised clinical trial.

OBJECTIVE: To compare the efficacy and safety of enteric-coated mycophenolate sodium (EC-MPS) versus azathioprine (AZA) in patients with active systemic lupus erythematosus (SLE) disease. METHODS: A multicentre, 24-month, superiority, open-label, randomised controlled trial (NCT01112215) was conducted with 240 patients (120 per arm) receiving either EC-MPS (target dose: 1440 mg/day) or AZA (target dose: 2 mg/kg/day) in addition to prednisone and/or antimalarials. The primary endpoint was the proportion of patients achieving clinical remission, assessed by SLE Disease Activity Index 2000 (SLEDAI-2K) and British Isles Lupus Assessment Group (BILAG), at 3 and 24 months. Secondary endpoints included time to clinical remission, BILAG A and B flare rates, time to flare, corticosteroid reduction and adverse events (AEs). RESULTS: Proportion of patients achieving clinical remission (clinical SLEDAI=0) was higher in the EC-MPS group at 3 (32.5% vs 19.2%; treatment difference, 13.3 (CI 2.3 to 24), p=0.034) and 24 months (71.2% vs 48.3%; treatment difference, 22.9 (CI 10.4 to 34.4), p<0.001). EC-MPS was superior with respect to time to clinical remission (HR 1.43; 95% CI 1.07 to 1.91; p=0.017). BILAG A/B and B flares occurred more frequently in the AZA group (71.7% vs 50%, p=0.001 and 21.67% vs 8.3%, p=0.004, respectively). EC-MPS was superior with respect to time to first BILAG A/B (HR 1.81; 95% CI 1.3 to 2.56; p=0.0004) and BILAG A flare (HR 2.84; 95% CI 1.37 to 5.89; p=0.003). AEs were similar in both groups except for leucopenia that occurred more frequently with AZA. CONCLUSIONS: EC-MPS was superior to AZA in treating SLE and preventing further relapses. TRIAL REGISTRATION NUMBER: NCT01112215; Results.