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Stroke, Vol 22, 299-304, Copyright © 1991 by American Heart Association

ARTICLES

Racial differences in cerebrovascular disease hospitalizations

AL Klatsky, MA Armstrong and GD Friedman
Department of Medicine, Kaiser Permanente Medical Care Program, Oakland, Calif. 94611-5693.

We studied the relationship of race to incidence of hospitalization for cerebrovascular disease among 74,096 white and 33,041 black persons who took health examinations in a prepaid health care program. Analyses were controlled for age, sex, body mass index, coffee use, smoking, alcohol use, systolic blood pressure, and baseline disease. Blacks were at higher hospitalization risk than whites for hemorrhagic cerebrovascular disease (relative risk = 2.4, 95% confidence interval = 1.3-5.8), cerebral thrombosis (relative risk = 1.9, 95% confidence interval = 1.2-2.9), and nonspecific cerebrovascular disease (relative risk = 1.6, 95% confidence interval = 1.2-2.2) but at lower hospitalization risk for extracranial occlusive disease (relative risk = 0.4, 95% confidence interval = 0.2-0.7). Blood pressure had a similar relation to all types of cerebrovascular disease in both races, but there were disparities in the relations of other atherosclerosis risk factors to different types of cerebrovascular disease. Educational attainment had little relation to hospitalization for extracranial occlusive disease, a finding that reduces the likelihood that selection bias explains the racial disparity. These data show unexplained racial differences in the type and location of cerebrovascular disease. The differences are important in understanding the pathogenesis of cerebrovascular disease and have practical clinical implications.

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