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Whites were more likely than blacks to have extracranial carotid artery lesions(33%versus 15%,P=.001),but the proportion of patients with intracranial lesions was similar(24%versus 22%).Men were more likely to have intracranial lesions than women(29%versus 14%,P=.03).When multivariate logistic regression and analysis was used,white race was the only predictor for extracranial carotid artery lesions,and male sex was the only predictor for intracranial lesions.The cause of stroke/TIA was extracranial carotid artery disease in 8%and intracranial disease in 8%of all patients studied.The distribution of cerebral atherosclerosis is influenced by race and sex but not by other vascular risk factors.In our patient population,intracranial disease is as common a cause of cerebral ischemia as extracranial carotid disease. |
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