American Journal of Epidemiology Advance Access originally published online on January 24, 2008
American Journal of Epidemiology 2008 167(6):684-691; doi:10.1093/aje/kwm366
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ORIGINAL CONTRIBUTIONS |
Alcoholic Beverages and Incidence of Dementia: 34-Year Follow-up of the Prospective Population Study of Women in Göteborg
1 Department of Public Health and Community Medicine/Primary Health Care, Sahlgrenska Academy at Göteborg University, Göteborg, Sweden
2 Neuropsychiatric Epidemiology Unit, Section of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at Göteborg University, Göteborg, Sweden
Correspondence to Kirsten Mehlig, Department of Public Health and Community Medicine/Primary Health Care, Sahlgrenska Academy at Göteborg University, Box 454, SE-405 30 Göteborg, Sweden (e-mail: kirsten.mehlig{at}gu.se).
Received for publication August 11, 2007. Accepted for publication November 19, 2007.
The objective of this study was to assess the association between different types of alcoholic beverages and 34-year incidence of dementia. Among a random sample of 1,462 women aged 38–60 years and living in Göteborg, Sweden, in 1968–1969, 164 cases of dementia were diagnosed by 2002. At baseline as well as in 1974–1975, 1980–1981, and 1992–1993, the frequency of alcohol intake, as well as other lifestyle and health factors, was recorded and related to dementia with Cox proportional hazard regression, by use of both baseline and updated covariates. Wine was protective for dementia (hazard ratio (HR) = 0.6, 95% confidence interval (CI): 0.4, 0.8) in the updated model, and the association was strongest among women who consumed wine only (HR = 0.3, 95% CI: 0.1, 0.8). After stratification by smoking, the protective association of wine was stronger among smokers. In contrast, consumption of spirits at baseline was associated with slightly increased risk of dementia (HR = 1.5, 95% CI: 1.0, 2.2). Results show that wine and spirits displayed opposing associations with dementia. Because a protective effect was not seen for the other beverages, at least part of the association for wine may be explained by components other than ethanol.
alcohol drinking; dementia; longitudinal studies; tobacco; wine; women
Abbreviations: CI, confidence interval; HR, hazard ratio
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