Publié par Preuves & Pratiques

Le café et le thé pourraient prévenir l'AVC.

Résultats d'une étude incluant 26.556 finlandais fumeurs (50-69 ans) suivis pendant 13,6 ans :

la consommation du thé, aussi bien que celle du café, a été inversement associée au risque d'infarctus cérébral,
 mais pas à celui d'hémorragie intracérébrale ou sous-arachnoïde.

Larsson & Coll., Stroke, juin 2008 ; 39 : 1681-1687.

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Coffee and Tea Consumption and Risk of Stroke Subtypes in Male Smokers

Susanna C. Larsson, PhD; Satu Männistö, PhD; Mikko J. Virtanen, MSc; Jukka Kontto, MSc; Demetrius Albanes, MD Jarmo Virtamo, MD
From National Institute of Environmental Medicine (S.C.L), Karolinska Institutet, Stockholm, Sweden; the Department of Health Promotion and Chronic Disease Prevention (S.M., M.J.V., J.K., J.V.), National Public Health Institute, Helsinki, Finland; and National Cancer Institute (D.A.), National Institute of Health, Bethesda, Md.

Correspondence to Susanna C. Larsson, PhD, Division of Nutritional Epidemiology, National Institute of Environmental Medicine, Karolinska Institutet, Box 210, SE-17177 Stockholm, Sweden. E-mail susanna.larsson@ki.se

Background and Purpose— Coffee and tea consumption could potentially reduce the risk of stroke because these beverages have antioxidant properties, and coffee may improve insulin sensitivity. We examined the associations of coffee and tea consumption with risk of stroke subtypes.

Methods— We used prospective data from the Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study, a cohort study of 26 556 male Finnish smokers aged 50 to 69 years without a history of stroke at baseline. Coffee and tea consumption was assessed at baseline using a validated food-frequency questionnaire. During a mean follow-up of 13.6 years, from 1985 through December 2004, 2702 cerebral infarctions, 383 intracerebral hemorrhages, and 196 subarachnoid hemorrhages were ascertained from national registries.

Results— After adjustment for age and cardiovascular risk factors, both consumption of coffee and tea was statistically significantly inversely associated with the risk of cerebral infarction but not intracerebral or subarachnoid hemorrhage. The multivariate relative risk of cerebral infarction for men in the highest category of coffee consumption (8 cups/d) was 0.77 (95% CI, 0.66 to 0.90; P for trend <0.001) compared with those in the lowest category (<2 cups/d). The corresponding relative risk comparing men in the highest category of tea consumption (2 cups/d) with those in the lowest category (nondrinkers) was 0.79 (95% CI, 0.68 to 0.92; P for trend=0.002).

Conclusions— These results suggest that high consumption of coffee and tea may reduce the risk of cerebral infarction among men, independent of known cardiovascular risk factors.
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