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JOURNAL ARTICLE

Real-world outcomes of rivaroxaban treatment in patients with nonvalvular atrial fibrillation and worsening renal function

Jyoji Nakagawara, Takanori Ikeda, Satoshi Ogawa, Takanari Kitazono, Kazuo Minematsu, Susumu Miyamoto, Yuji Murakawa, Makiko Takeichi, Yoko Kidani, Yutaka Okayama, Toshiyuki Sunaya, Shoichiro Sato, Satoshi Yamanaka
Journal of Cardiology 2019 July 29
31371191

BACKGROUND: Rivaroxaban is a direct oral anticoagulant administered to reduce the risk of stroke and systemic embolism in patients with nonvalvular atrial fibrillation (NVAF). The Xarelto Post-Authorization Safety and Effectiveness Study in Japanese Patients with Atrial Fibrillation (XAPASS) was a prospective, observational, post-marketing surveillance study that examined the safety and effectiveness of rivaroxaban in routine clinical practice. This sub-analysis of the XAPASS investigated the outcomes of patients with worsening renal function (WRF).

METHODS: The XAPASS included 11,308 patients with NVAF who began treatment with rivaroxaban. Of 9578 patients who completed 1-year follow-up, the 7509 patients, for whom the change in creatinine clearance could be assessed, were included in the present analysis. Patients with WRF were those with a decrease in creatinine clearance of ≥20% from enrollment to any time point; patients with stable renal function (SRF) were those without such a decrease. Outcomes in patients with WRF versus SRF were compared at 1 year.

RESULTS: We identified 1229 patients with WRF and 6280 patients with SRF. Patients with WRF were older and had higher mean CHADS2 and modified HAS-BLED scores compared to patients with SRF. The incidence rates of any bleeding (hazard ratio: 1.12; 95% confidence interval: 0.88-1.41), major bleeding (1.20; 0.75-1.90), and the composite endpoint stroke/systemic embolism/myocardial infarction (1.06; 0.65-1.71) were similar between the two groups.

CONCLUSIONS: No association between WRF and occurrence of any bleeding, major bleeding, and stroke/systemic embolism/myocardial infarction was observed in patients with AF on rivaroxaban treatment during 1-year follow-up in real-world clinical practice. Clinicaltrials.gov: NCT01582737.

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