Is the Effect of Alcohol on Risk of Stroke Confined to Highly Stressed Persons? (original) (raw)
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Research Articles| September 02 2005
aCentre for Alcohol Research, National Institute of Public Health,
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bDepartment of Neurology, Bispebjerg University Hospital, Copenhagen,
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fDuke University Medical Center, Durham, N.C., USA
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cDepartment of Clinical Epidemiology, Aalborg Hospital and Aarhus University Hospital,
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cDepartment of Clinical Epidemiology, Aalborg Hospital and Aarhus University Hospital,
dDepartment of Epidemiology and Social Medicine, University of Aarhus, Aarhus, and
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bDepartment of Neurology, Bispebjerg University Hospital, Copenhagen,
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eThe Copenhagen City Heart Study, Epidemiological Research Unit, Bispebjerg University Hospital, Copenhagen, Denmark;
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aCentre for Alcohol Research, National Institute of Public Health,
eThe Copenhagen City Heart Study, Epidemiological Research Unit, Bispebjerg University Hospital, Copenhagen, Denmark;
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Neuroepidemiology (2005) 25 (3): 105–113.
Abstract
Background: Psychological stress and alcohol are both suggested as risk factors for stroke. Further, there appears to be a close relation between stress and alcohol consumption. Several experimental studies have found alcohol consumption to reduce the immediate effects of stress in a laboratory setting. We aimed to examine whether the association between alcohol and stroke depends on level of self-reported stress in a large prospective cohort. Methods: The 5,373 men and 6,723 women participating in the second examination of the Copenhagen City Heart Study in 1981–1983 were asked at baseline about their self-reported level of stress and their weekly alcohol consumption. The participants were followed-up until 31st of December 1997 during which 880 first ever stroke events occurred. Data were analysed by means of Cox regression modelling. Results: At a high stress level, weekly total consumption of 1–14 units of alcohol compared with no consumption seemed associated with a lower risk of stroke (adjusted RR: 0.57, 95% CI: 0.31–1.07). At lower stress levels, no clear associations were observed. Regarding subtypes, self-reported stress appeared only to modify the association between alcohol intake and ischaemic stroke events. Regarding specific types of alcoholic beverages, self-reported stress only modified the associations for intake of beer and wine. Conclusions: This study indicates that the apparent lower risk of stroke associated with moderate alcohol consumption is confined to a group of highly stressed persons. It is suggested that alcohol consumption may play a role in reducing the risk of stroke by modifying the physiological or psychological stress response.
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© 2005 S. Karger AG, Basel
2005
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