1. Impact of the 2017 AmericanHeart Association and American College of Cardiology hypertension guideline in aged individuals
- Author
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Chowdhury, Enayet, Ernst, M.E., Nelson, M., Margolis, K., Beilin, L.J., Johnston, C., Woods, R., Murray, A., Wolfe, R., Storey, E., Shah, R.C., Lockery, J., Tonkin, A., Newman, A., Abhayaratna, W., Stocks, N., Fitzgerald, S., Orchard, S., Trevaks, R., Donnan, G., Grimm, R., McNeil, J., Reid, Christopher, Chowdhury, Enayet, Ernst, M.E., Nelson, M., Margolis, K., Beilin, L.J., Johnston, C., Woods, R., Murray, A., Wolfe, R., Storey, E., Shah, R.C., Lockery, J., Tonkin, A., Newman, A., Abhayaratna, W., Stocks, N., Fitzgerald, S., Orchard, S., Trevaks, R., Donnan, G., Grimm, R., McNeil, J., and Reid, Christopher
- Abstract
Objectives: The AHA/ACC-2017 hypertension guideline recommends an age-independent target blood pressure (BP) of less than 130/80 mmHg. In an elderly cohort without established cardiovascular disease (CVD) at baseline, we determined the impact of this guideline on the prevalence of hypertension and associated CVD risk. Methods: Nineteen thousand, one hundred and fourteen participants aged at least 65 years from the ASPirin in Reducing Events in the Elderly (ASPREE) study were grouped by baseline BP: 'pre-2017 hypertensive' (BP <140/90mmHg and/or on antihypertensive drugs); 'reclassified hypertensive' (normotensive by pre-2017 guidelines; hypertensive by AHA/ACC-2017 guideline), and 'normotensive' (BP <130 and <80 mmHg). For each group, we evaluated CVD risk factors, predicted 10-year CVD risk using the Atherosclerotic Cardiovascular Disease (ASCVD) risk equation, and reported observed CVD event rates during a median 4.7-year follow-up. Results: Overall, 74.4% (14 213/19 114) were 'pre-2017 hypertensive'; an additional 12.3% (2354/19 114) were 'reclassified hypertensive' by the AHA/ACC-2017 guideline. Of those 'reclassified hypertensive', the majority (94.5%) met criteria for antihypertensive treatment although 29% had no other traditional CVD risk factors other than age. Further, a relatively lower mean 10-year predicted CVD risk (18% versus 26%, P<0.001) and lower CVD rates (8.9 versus 12.1/1000 person-years, P=0.01) were observed in 'reclassified hypertensive' compared with 'pre-2017 hypertensive'. Compared with 'normotensive', a hazard ratio (95% confidence interval) for CVD events of 1.60 (1.26-2.02) for 'pre-2017 hypertensive' and 1.26 (0.93-1.71) for 'reclassified hypertensive' was observed. Conclusion: Applying current CVD risk calculators in the elderly 'reclassified hypertensive', as a result of shifting the BP threshold lower, increases eligibility for antihypertensive treatment but documented CVD rates remain lower than hypertensive patients defined by pre
- Published
- 2020