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  • Title: Impact of Renal Function on Outcomes With Edoxaban in Real-World Patients With Atrial Fibrillation.
    Author: Yu HT, Yang PS, Kim TH, Jang E, Kim D, Uhm JS, Kim JY, Pak HN, Lee MH, Lip GYH, Joung B.
    Journal: Stroke; 2018 Oct; 49(10):2421-2429. PubMed ID: 30355093.
    Abstract:
    Background and Purpose- Edoxaban is a direct oral factor Xa inhibitor with proven efficacy and safety among patients with atrial fibrillation. Concerns have been raised about an excess of stroke among patients with creatinine clearance (CrCl) >95 mg/mL treated with edoxaban. We assessed the real-world effectiveness and safety of edoxaban in atrial fibrillation patients in relation to CrCl. Methods- In the Korean National Health Insurance Service data during the period from January to December 2016, we identified 9537 edoxaban-treated patients. Effectiveness and safety outcomes were compared between high-dose edoxaban regimen (HDER, 60 mg daily, n=2840) and a propensity score-matched warfarin group (n=2840) and between low-dose edoxaban regimen (LDER, 30 mg daily, n=3016) and matched warfarin group (n=3016). Results- The median follow-up period was 5.0 months (interquartile range, 2-7 months). The mean age was 68 years, and 63% were men in HDER group, and the mean age was 73 years, and 52% were men in LDER group. Compared with warfarin, both HDER and LDER significantly decreased the risk for ischemic stroke or systemic embolism (S/SE; HDER: adjusted hazard ratio [aHR], 0.44; 95% CI, 0.31-0.64; LDER: aHR, 0.57; 95% CI, 0.42-0.78), major bleeding (HDER: aHR, 0.40; 95% CI, 0.26-0.61; LDER: aHR, 0.61; 95% CI, 0.43-0.85), and mortality (HDER: aHR, 0.34; 95% CI, 0.22-0.53; LDER: aHR, 0.55; 95% CI, 0.41-0.73). In patients with CrCl >95 mL/min, the incidence of S/SE was higher with LDER than warfarin and comparable between HDER and warfarin group. There was lower effectiveness for the prevention of S/SE with LDER compared with warfarin at higher CrCl levels ( P for interaction=0.023). Conclusions- In real-world practice, both doses of edoxaban were associated with reduced risks for S/SE, major bleeding, and mortality compared with warfarin. LDER had lower effectiveness for the prevention of S/SE compared with warfarin at higher levels of CrCl (>95 mL/min).
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