Ambar Kulshreshtha1, Margarethe Goetz2, Alvaro Alonso3, Amit J Shah3,4, J Douglas Bremner5, Jack Goldberg6,7, Viola Vaccarino3,4. 1. Department of Family and Preventive Medicine, Emory University School of Medicine, Atlanta, GA, USA. 2. Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA. 3. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA. 4. Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA. 5. Department of Psychiatry and Behavioral Sciences and the Department of Radiology, Emory University School of Medicine, and the Atlanta VA Medical Center, Decatur, GA, USA. 6. Vietnam Era Twin Registry, Seattle, WA, USA. 7. University of Washington School of Public Health, Seattle, WA, USA.
Abstract
BACKGROUND/ OBJECTIVE: The 2020 Strategic Impact Goal introduced by the American Heart Association (AHA) aims at improving cardiovascular health (CVH) of all Americans by 20%. AHA defined ideal CVH across seven established modifiable risk factors for cardiovascular diseases. Prior studies have indicated that ideal CVH also benefits brain health and cognitive aging, but it is possible that this association is explained by familial factors. METHODS: We examined 272 male monozygotic and dizygotic twin pairs (total 544 subjects) free of overt cardiovascular disease and dementia from the Vietnam Era Twin Registry. Memory and learning were measured by Trail Making tests and Wechsler Memory Scale (Immediate and Delayed Memory tests and Visual Reproductive Test). Each of the seven CVH components (smoking, body mass index, physical activity, diet, total cholesterol, blood pressure, and blood glucose) was scored per established criterion. RESULTS: The mean age of the twins was 55 years, 96% were whites, and 61% monozygotic. When considering twins as individuals, for every unit increase in CVH score (indicating better cardiovascular health), twins demonstrated faster cognitive processing speed (Trail B: - 5.6 s, 95% CI - 10.3, - 0.9; p = 0.03) and better story recall, both immediate (0.35, 95% CI 0.06, 0.62; p = 0.02) and delayed (0.39, 95% CI 0.08, 0.70; p = 0.01). CONCLUSIONS: Better CVH is associated with better cognitive health in several domains. As suggested by within-pair analysis, this association is largely explained by familial factors, implying that early life exposures are shared determinants of both brain health and cardiovascular health.
BACKGROUND/ OBJECTIVE: The 2020 Strategic Impact Goal introduced by the American Heart Association (AHA) aims at improving cardiovascular health (CVH) of all Americans by 20%. AHA defined ideal CVH across seven established modifiable risk factors for cardiovascular diseases. Prior studies have indicated that ideal CVH also benefits brain health and cognitive aging, but it is possible that this association is explained by familial factors. METHODS: We examined 272 male monozygotic and dizygotic twin pairs (total 544 subjects) free of overt cardiovascular disease and dementia from the Vietnam Era Twin Registry. Memory and learning were measured by Trail Making tests and Wechsler Memory Scale (Immediate and Delayed Memory tests and Visual Reproductive Test). Each of the seven CVH components (smoking, body mass index, physical activity, diet, total cholesterol, blood pressure, and blood glucose) was scored per established criterion. RESULTS: The mean age of the twins was 55 years, 96% were whites, and 61% monozygotic. When considering twins as individuals, for every unit increase in CVH score (indicating better cardiovascular health), twins demonstrated faster cognitive processing speed (Trail B: - 5.6 s, 95% CI - 10.3, - 0.9; p = 0.03) and better story recall, both immediate (0.35, 95% CI 0.06, 0.62; p = 0.02) and delayed (0.39, 95% CI 0.08, 0.70; p = 0.01). CONCLUSIONS: Better CVH is associated with better cognitive health in several domains. As suggested by within-pair analysis, this association is largely explained by familial factors, implying that early life exposures are shared determinants of both brain health and cardiovascular health.
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