Etiology of and risk factors for cerebral infarction in young adults in western Norway: a population-based case-control study
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H Naess1, H I Nyland, L Thomassen
1Department of Neurology, Haukeland University Hospital, University of Bergen, Bergen, Norway. halvor.naess@haukeland.no
Abstract:
We sought to study the etiology of and risk factors for cerebral infarction in young adults in Hordaland County, Norway. All patients aged 15-49 years living in Hordaland County with a first-ever cerebral infarction during 1988-97 were included. Etiology was analyzed in subgroups defined by sex, age (<40 years versus >/=40 years), circulation territory (anterior versus posterior circulation) and short-term functional outcome [modified Rankin score (mRS) = 2 versus mRS > 2]. A questionnaire was used to evaluate possible risk factors amongst the patients compared with an age- and sex-matched control group. The distribution of etiology was significantly different in all subgroups. Atherosclerosis was frequent amongst men (22.8% vs. 4.2%) and patients >/= 40 years (20.8% vs. 2.7%). All patients with microangiopathy had favorable short-term outcome. Significant risk factors were smoking more than 15 cigarettes per day (P < 0.001), hypertension (P = 0.001), and myocardial infarction (P = 0.035). Modifiable risk factors were frequent.
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