Ethnic differences in blood pressure control among men at Veterans Affairs clinics and other health care sites.

Background: Differential access to health care may contribute to lower blood pressure (BP) control rates to under 140/90 mm Hg in African American compared with white hypertensive patients, especially men (26.5% vs 36.5% of all hypertensive patients in the National Health and Nutrition Examination Survey 1999-2000). The Department of Veterans Affairs (VA) system, which provides access to health care and medications across ethnic and economic boundaries, may reduce disparities in BP control.

Methods: To test this hypothesis, BP treatment and control groups were compared between African American (VA, n = 4379; non-VA, n = 2754) and white (VA, n = 7987; non-VA, n = 4980) hypertensive men.

Results: In both groups, whites were older than African Americans (P<.05), had lower BP (P<.001), and had BP controlled to below 140/90 mm Hg more often on their last visit (P<.01). Blood pressure control to below 140/90 mm Hg was comparable among white hypertensive men at VA (55.6%) and non-VA (54.2%) settings (P = .12). In contrast, BP control was higher among African American hypertensive men at VA (49.4%) compared with non-VA (44.0%) settings (P<.01), even after controlling for age, numerous comorbid conditions, and rural-urban classification. African American hypertensive men received a comparable number of prescriptions for BP medications at VA sites (P = .18) and more prescriptions at non-VA sites than did whites (P<.001). African Americans had more visits in the previous year at VA sites (P<.001) and fewer visits at non-VA sites (P<.001) compared with whites.

Conclusions: The ethnic disparity in BP control between African Americans and whites was approximately 40% less at VA than at non-VA health care sites (6.2% vs 10.2%; P<.01). Ensuring access to health care could constitute one constructive component of a national initiative to reduce ethnic disparities in BP control and cardiovascular risk.