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The total and direct effects of systolic and diastolic blood pressure on cardiovascular disease and longevity using Mendelian randomisation
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The total and direct effects of systolic and diastolic blood pressure on cardiovascular disease and longevity using Mendelian randomisation
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Journal Article
The total and direct effects of systolic and diastolic blood pressure on cardiovascular disease and longevity using Mendelian randomisation
2021
Overview
The 2017 American College of Cardiology/American Heart Association (ACC/AHA) blood pressure (BP) guidelines lowered the hypertension threshold to ≥ 130/80 mmHg, but the role of diastolic BP remains contested. This two-sample mendelian randomisation study used replicated genetic variants predicting systolic and diastolic BP applied to the UK Biobank and large genetic consortia, including of cardiovascular diseases and parental lifespan, to obtain total and direct effects. Systolic and diastolic BP had positive total effects on CVD (odds ratio (OR) per standard deviation 2.15, 95% confidence interval (CI) 1.95, 2.37 and OR 1.91, 95% CI 1.73, 2.11, respectively). Direct effects were similar for systolic BP (OR 1.83, 95% CI 1.48, 2.25) but completely attenuated for diastolic BP (1.18, 95% CI 0.97, 1.44), although diastolic BP was associated with coronary artery disease (OR 1.24, 95% CI 1.03, 1.50). Systolic and diastolic BP had similarly negative total (− 0.20 parental attained age z-score, 95% CI − 0.22, − 0.17 and − 0.17, 95% CI − 0.20, − 0.15, respectively) and direct negative effects on longevity. Our findings suggest systolic BP has larger direct effects than diastolic BP on CVD, but both have negative effects (total and direct) on longevity, supporting the 2017 ACC/AHA guidelines lowering both BP targets.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
