This transcript has been edited for clarity.
This is Dr JoAnn Manson, professor of medicine at Harvard Medical School and Brigham and Women's Hospital. I'd like to talk about a recent report in the journal Hypertension that raises questions about whether blood pressure (BP) guidelines should be revisited and whether sex-specific thresholds and targets should be considered. Current BP guidelines are sex-agnostic.
This study was done in the large-scale nationally representative NHANES cohort. It included more than 53,000 US men and women. The average age was about 45 years, with an average duration of follow-up of 9.5 years. During that time, about 2400 cardiovascular (CVD) deaths were documented at baseline. The BP was measured three times, and the results were averaged. About 20% of the cohort were taking antihypertensive medications, and 80% were not.
Sex differences were observed in the association between BP and CVD mortality. The systolic BP associated with the lowest risk for CVD death was 110-119 mm Hg in men and 100-109 mm Hg in women. In men, however, compared with a reference category of systolic BP of 100-109 mm Hg, the risk for CVD death began to increase significantly at a systolic BP ≥ 160 mm Hg, at which point, the hazard ratio was 1.76, or 76% higher risk.
In women, the risk for CVD death began to increase significantly at a lower threshold. Compared with a reference category of systolic BP of 100-109 mm Hg, women whose systolic BP was 130-139 mm Hg had a significant 61% increase in CVD death, and among those with a systolic BP of 140-159 mm Hg, the risk was increased by 75%. With a systolic BP ≥ 160 mm Hg, CVD deaths among women were more than doubled, with a hazard ratio of 2.13.
Overall, these findings suggest sex differences, with women having an increased risk for CVD death beginning at a lower elevation of their systolic BP. For diastolic BP, both men and women showed the typical U-shaped curve and the diastolic BP associated with the lowest risk for CVD death was 70-80 mm Hg.
If these findings can be replicated with additional research and other large-scale cohort studies, and randomized trials show differences in lowering BP, then sex-specific BP guidelines could have advantages and should be seriously considered. Furthermore, some of the CVD risk scores and risk modeling should perhaps use sex-specific blood pressure thresholds.
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Cite this: Should BP Guidelines Be Sex-Specific? - Medscape - Dec 18, 2023.
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