Urban-rural differences in hypertension prevalence, blood pressure control, and systolic blood pressure levels

Abstract

Higher rates of cardiovascular events have been observed among rural residents compared with urban. Hypertension and lack of blood pressure (BP) control are risk factors for cardiovascular events. We compared the prevalence of hypertension and controlled BP, and the distribution of systolic blood pressure (SBP), by urban-rural residence. Participants from the REasons for Geographic And Racial Differences in Stroke (REGARDS) Study, a prospective cohort of Black and White adults aged ≥45 years, were categorized as either urban, large rural, or small-isolated rural, by using the Rural-Urban Commuting Area (RUCA) categorization B system. Oucomes were hypertension prevalence (BP ≥ 140/90 mmHg or antihypertensive use), BP control (BP < 140/90 among participants on antihypertensive medication), and the distribution of SBP. Counfounders were age, race, sex, antihypertensive medication use, and US Census Bureau division. The analysis included 26,133 participants (80.3% urban, 11.6% large-rural, 8.2% small-isolated rural). The unadjusted prevalence of hypertension was not different between groups. However, after adjustment, the odds of hypertension was higher among participants in the large rural group (odds ratio [OR] 1.17; 95% confidence interval [CI], 1.08-1.27) and small-isolated rural group (OR 1.19; 95% CI, 1.08-1.30), compared with the urban group. There was no evidence of an adjusted difference in BP control for those taking antihypertensive medications. Adjusted differences in SBP were greater for both rural groups, compared with urban, at the higher percentiles of SBP. Rural residence was associated with a higher adjusted odds of hypertension and higher SBP.