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Neuroepidemiology Section, Department of Neurology, Medical College of Pennsylvania, Philadelphia, PA (Drs. Friday, Alter, LaRue, and Gil-Peralta, and Ms. Lai)
Department of Preventive Medicine, University of Southern California School of Medicine, Los Angeles, CA (Dr. Sobel)
Lehigh Valley Stroke Program, Allentown, PA. (Drs. McCoy and Levitt, and Ms. Isack)
We investigated black/white differences in stroke rate (standardized morbidity), severity, and subtype, and the relative frequencies of 5 primary risk factors (hypertension, diabetes, myocardial infarction, other heart diseases, and transient ischemic attack [TIA]) using the Lehigh Valley Stroke Register. Blacks had a statistically significant higher, age-adjusted rate of stroke than whites. We found no differences in stroke severity using our measures but blacks had a statistically higher proportion of lacunar stroke, while whites had a higher proportion of embolic stroke. There were no differences in proportions of thrombotic stroke or intracerebral hemorrhage. The relative frequencies of hypertension, myocardial infarction, other heart diseases, and diabetes were higher for blacks, while the relative frequency of TIA was higher for whites. These observations are consistent with other reports that blacks have a higher frequency of stroke and tend to have more small-vessel cerebrovascular pathology than whites.
Address correspondence to Dr. Alter, and reprint requests to Dr. Friday, Neuroepidemiology Section, Department of Neurology, Medical College of Pennsylvania, 3300 Henry Avenue, Philadelphia, PA 19129.
Received January 17, 1989. Accepted for publication in final form March 17, 1989.
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