Roopinder K Sandhu1, Justin Ezekowitz2,3, Ulrika Andersson4, John H Alexander5, Christopher B Granger5, Sigrun Halvorsen6, Michael Hanna7, Ziad Hijazi4,8, Petr Jansky9, Renato D Lopes5, Lars Wallentin4,8. 1. Mazankowski Alberta Heart Institute, University of Alberta, 8440-112 Street, 2C2 WMC, Edmonton, Alberta, Canada T6G 2B7 rsandhu2@ualberta.ca. 2. Mazankowski Alberta Heart Institute, University of Alberta, 8440-112 Street, 2C2 WMC, Edmonton, Alberta, Canada T6G 2B7. 3. Canadian VIGOUR Centre, University of Alberta, Edmonton, Alberta, Canada. 4. Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden. 5. Duke Clinical Research Institute, Duke Medicine, Durham, NC, USA. 6. Department of Cardiology B, Oslo University Hospital Ulleval and University of Oslo, Oslo, Norway. 7. Bristol-Myers Squibb, Princeton, NJ, USA. 8. Department of Medical Sciences, Cardiology, Uppsala University, Uppsala, Sweden. 9. University Hospital Motol, Prague, Czech Republic.
Abstract
AIMS: The prognostic implication of adiposity on clinical outcomes in atrial fibrillation (AF) patients treated with oral anticoagulation is unclear. METHODS AND RESULTS: A total of 17 913 patients in the Apixaban for Reduction in Stroke and Other Thromboembolic Events in Atrial Fibrillation trial had body mass index (BMI) measured at baseline. For the primary analysis, BMI was categorized as normal (18.5 to <25 kg/m2), overweight (25 to <30 kg/m2), and obese (≥30 kg/m2). Waist circumference (WC) was defined as high if >102 cm for men and >88 cm in women. Outcomes were stroke or systemic embolism, a composite endpoint (stroke, systemic embolism, myocardial infarction, or all-cause mortality), all-cause mortality, and major bleeding. Cox models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) across categories of BMI and WC adjusting for established risk factors and treatment allocation. At baseline, 4052 (22.6%) patients had a normal BMI, 6702 (37.4%) were overweight, and 7159 (40.0%) were obese. In multivariable analyses, higher BMI was associated with a lower risk of all-cause mortality [overweight: HR 0.67 (95% CI 0.59-0.78); obese: HR 0.63 (95% CI 0.54-0.74), P < 0.0001] and the composite endpoint [overweight: HR 0.74 (95% CI 0.65-0.84); obese: HR 0.68 (95% CI 0.60-0.78), P < 0.0001] compared with normal BMI. In women, high WC was associated with a 31% lower risk of all-cause mortality (P = 0.001), 27% lower risk of the composite endpoint (P = 0.001), and 28% lower risk of stroke or systemic embolism (P = 0.048) but not in men. There was no significant association between adiposity and major bleeding. CONCLUSION: In patients with AF treated with oral anticoagulants, higher BMI and WC are associated with a more favourable prognosis. Published on behalf of the European Society of Cardiology. All rights reserved.
AIMS: The prognostic implication of adiposity on clinical outcomes in atrial fibrillation (AF) patients treated with oral anticoagulation is unclear. METHODS AND RESULTS: A total of 17 913 patients in the Apixaban for Reduction in Stroke and Other Thromboembolic Events in Atrial Fibrillation trial had body mass index (BMI) measured at baseline. For the primary analysis, BMI was categorized as normal (18.5 to <25 kg/m2), overweight (25 to <30 kg/m2), and obese (≥30 kg/m2). Waist circumference (WC) was defined as high if >102 cm for men and >88 cm in women. Outcomes were stroke or systemic embolism, a composite endpoint (stroke, systemic embolism, myocardial infarction, or all-cause mortality), all-cause mortality, and major bleeding. Cox models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) across categories of BMI and WC adjusting for established risk factors and treatment allocation. At baseline, 4052 (22.6%) patients had a normal BMI, 6702 (37.4%) were overweight, and 7159 (40.0%) were obese. In multivariable analyses, higher BMI was associated with a lower risk of all-cause mortality [overweight: HR 0.67 (95% CI 0.59-0.78); obese: HR 0.63 (95% CI 0.54-0.74), P < 0.0001] and the composite endpoint [overweight: HR 0.74 (95% CI 0.65-0.84); obese: HR 0.68 (95% CI 0.60-0.78), P < 0.0001] compared with normal BMI. In women, high WC was associated with a 31% lower risk of all-cause mortality (P = 0.001), 27% lower risk of the composite endpoint (P = 0.001), and 28% lower risk of stroke or systemic embolism (P = 0.048) but not in men. There was no significant association between adiposity and major bleeding. CONCLUSION: In patients with AF treated with oral anticoagulants, higher BMI and WC are associated with a more favourable prognosis. Published on behalf of the European Society of Cardiology. All rights reserved.
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