OBJECTIVETo estimate the frequency of various risk factors for overall stroke and to identify risk factors for cerebral infarction (CI) versus intracerebral hemorrhage (ICH) in a large hospital-based stroke registry.

METHODData from a total of 3901 patients, consisting of 3525 patients with CI and 376 patients with ICH were prospectively coded and entered into a computerized data bank.

RESULTSHypertension and smoking were the most prominent factors affecting overall stroke followed by mild internal carotid artery stenosis (< 50%), hypercholesterolemia, transient ischemic attacks (TIAs), diabetes mellitus, and cardiac ischemia. Univariate analysis showed that factors in male significantly associated with CI versus ICH were old age, a family history of stroke, and intermittent claudication; whereas in female the factors were oral contraception and migraine. By multivariate analysis, in all patients, the factors significantly associated with CI as opposed to ICH were smoking, hypercholesterolemia, migraine, TIAs, atrial fibrillation, structural heart disease, and arterial disease. Hypertension was the only significant factor related with ICH versus CI.

CONCLUSIONSThe factors for ischemic and hemorrhagic stroke are not exactly the same. Cardiac and arterial disease are the most powerful factors associated with CI rather than ICH.

Adolescent ; Adult ; Age Factors ; Aged ; Aged, 80 and over ; Cerebral Hemorrhage ; etiology ; genetics ; Cerebral Infarction ; etiology ; genetics ; Female ; Humans ; Hypertension ; complications ; Male ; Middle Aged ; Risk Factors ; Sex Factors ; Smoking ; adverse effects ; Stroke ; etiology ; genetics