[Incidence, risk factors and causes of stroke in young adults].

A 1-year, nation-wide study was conducted to determine the incidence, risk factors and causes of stroke in young adults. Permanent residents of Israel of both genders, aged 17-49 years, who were referred to 23 general hospitals with a first, acute stroke from 1 Nov. 1992 to 31 Oct. 1993, were studied. Briefed investigators administered a prospective questionnaire pertaining to demographic and socioeconomic variables; past, present and family histories; and condition on admission and discharge. 253 subjects, 17-49 years of age, of whom 62.8% were men, had a first stroke during the year. The incidence was 10.3/100,000/year, increasing with age. 80.6% of strokes were due to infarctions, 9.9% intracerebral hemorrhages, 7.9% subarachnoid hemorrhages, and 1.6% were of undetermined type. There was no seasonal variation in incidence; 45.6% occurred in the morning. The main risk factors were smoking (53.6%), hypertension (43.4%), hyperlipidemia (22%) and diabetes (21%). Atherosclerosis was the main cause of the strokes (52%). In 3.5% there was no residual damage, 10.3% were left with minimal damage, 40.3% remained with minor disability, 19% with moderate disability, 17.4% with severe disability and 9.9% died. The data on incidence concur with those published from western Europe. However, the data on risk factors differ from those of young adults and are identical with those of the older population. Although these risk factors can be modified, preventive measures were insufficiently used. More comprehensive diagnosis is needed to determine stroke etiology in each patient and establishing a national stroke registry is important for planning and improving services.