Fatima Rodriguez1, Marcia L Stefanick2, Philip Greenland3, Elsayed Z Soliman4, JoAnn E Manson5, Nisha Parikh6, Lisa W Martin7, Joseph C Larson8, Mark Hlatky9, Rami Nassir10, Crystal W Cené11, Beatriz L Rodriguez12, Christine Albert13, Marco V Perez9. 1. Division of Cardiovascular Medicine, Stanford University, Stanford, CA. Electronic address: frodrigu@stanford.edu. 2. Department of Medicine, Stanford Prevention Research Center, Stanford University, Stanford, CA. 3. Department of Preventive Medicine, Northwestern School of Medicine, Chicago, IL. 4. Epidemiological Cardiology Research Center (EPICARE), Wake Forest School of Medicine, Winston Salem, NC. 5. Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA. 6. Division of Cardiovascular Medicine, University of California San Francisco School of Medicine, San Francisco, CA. 7. Division of Cardiology, George Washington University School of Medicine and Health Sciences, Washington, DC. 8. Data Coordinating Center, Fred Hutchinson Cancer Research Center, Seattle, WA. 9. Division of Cardiovascular Medicine, Stanford University, Stanford, CA. 10. Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, CA. 11. Division of General Internal Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC. 12. Divison of Geriatrics, University of Hawaii at Manoa, Honolulu, HI. 13. Division of Cardiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
Abstract
BACKGROUND: The incidence of atrial fibrillation (AF) is higher in non-Hispanic whites (NHWs) compared with other race-ethnic groups, despite more favorable cardiovascular risk profiles. To explore reasons for this paradox, we compared the hazards of AF from traditional and other risk factors between 4 race-ethnic groups in a large cohort of postmenopausal women. METHODS: We included 114,083 NHWs, 11,876 African Americans, 5,174 Hispanics, and 3,803 Asians from the Women's Health Initiative free of AF at baseline. Women, averaging 63 years old, were followed up for incident AF using hospitalization records and diagnostic codes from Medicare claims. RESULTS: Over a mean of 13.7 years, 19,712 incident cases of AF were recorded. Despite a higher burden of hypertension, diabetes, and obesity, annual AF incidence was lower among nonwhites (0.7%, 0.4%, and 0.4% for African American, Hispanic, and Asian participants, respectively, compared with 1.2% for NHWs). The hazards of AF from hypertension, diabetes, obesity, heart failure, and coronary artery disease were similar across race-ethnic groups. Major risk factors, including hypertension, obesity, diabetes, smoking, peripheral arterial disease, coronary artery disease, and heart failure, accounted for an attributable risk of 50.3% in NHWs, 83.1% in African Americans, 65.6% in Hispanics, and 37.4% in Asians. Established AF prediction models performed comparably across race-ethnic groups. CONCLUSIONS: In this large study of postmenopausal women, traditional cardiovascular risk factors conferred a similar degree of individual risk of AF among 4 race-ethnic groups. However, major AF risk factors conferred a higher-attributable risk in African Americans and Hispanics compared with NHWs and Asians.
BACKGROUND: The incidence of atrial fibrillation (AF) is higher in non-Hispanic whites (NHWs) compared with other race-ethnic groups, despite more favorable cardiovascular risk profiles. To explore reasons for this paradox, we compared the hazards of AF from traditional and other risk factors between 4 race-ethnic groups in a large cohort of postmenopausal women. METHODS: We included 114,083 NHWs, 11,876 African Americans, 5,174 Hispanics, and 3,803 Asians from the Women's Health Initiative free of AF at baseline. Women, averaging 63 years old, were followed up for incident AF using hospitalization records and diagnostic codes from Medicare claims. RESULTS: Over a mean of 13.7 years, 19,712 incident cases of AF were recorded. Despite a higher burden of hypertension, diabetes, and obesity, annual AF incidence was lower among nonwhites (0.7%, 0.4%, and 0.4% for African American, Hispanic, and Asian participants, respectively, compared with 1.2% for NHWs). The hazards of AF from hypertension, diabetes, obesity, heart failure, and coronary artery disease were similar across race-ethnic groups. Major risk factors, including hypertension, obesity, diabetes, smoking, peripheral arterial disease, coronary artery disease, and heart failure, accounted for an attributable risk of 50.3% in NHWs, 83.1% in African Americans, 65.6% in Hispanics, and 37.4% in Asians. Established AF prediction models performed comparably across race-ethnic groups. CONCLUSIONS: In this large study of postmenopausal women, traditional cardiovascular risk factors conferred a similar degree of individual risk of AF among 4 race-ethnic groups. However, major AF risk factors conferred a higher-attributable risk in African Americans and Hispanics compared with NHWs and Asians.
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