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Alcohol and hemorrhagic stroke. The Honolulu Heart Program
Insights
Alcohol consumption significantly increases the risk of hemorrhagic stroke, particularly subarachnoid hemorrhage. Heavy drinkers face a nearly tripled risk compared to nondrinkers, highlighting alcohol
Area of Science:
- Cardiovascular epidemiology
- Neurology
- Public Health
Background:
- The Honolulu Heart Program (HHP) is a long-term prospective study initiated in 1965.
- Cardiovascular disease, including stroke, remains a major public health concern.
- Understanding lifestyle factors, such as alcohol consumption, is crucial for stroke prevention.
Purpose of the Study:
- To investigate the association between alcohol consumption and the risk of stroke.
- To differentiate the effects of alcohol on various stroke subtypes (thromboembolic vs. hemorrhagic).
- To assess the impact of alcohol on subarachnoid hemorrhage risk.
Main Methods:
- Prospective cohort study design with 8,006 male participants.
- Classification of participants into alcohol drinkers and nondrinkers.
- 12-year follow-up period to ascertain stroke incidence.
- Statistical analysis to determine risk independent of other factors.
Main Results:
- No significant link found between alcohol intake and thromboembolic stroke.
- Alcohol consumption was associated with a significantly increased risk of hemorrhagic stroke.
- Light, moderate, and heavy drinkers showed a dose-dependent increase in hemorrhagic stroke risk.
- A threefold to fourfold increased risk of subarachnoid hemorrhage was observed in moderate to heavy drinkers.
Conclusions:
- Alcohol consumption is a significant risk factor for hemorrhagic stroke, especially subarachnoid hemorrhage.
- The findings are independent of hypertension and other cardiovascular risk factors.
- Reducing alcohol intake may be a strategy for preventing hemorrhagic strokes.
Abstract:
Since 1965, the Honolulu Heart Program has followed up 8,006 men in a prospective study of cardiovascular disease. Of those subjects free of stroke at the time of study entry, 2,916 were classified as nondrinkers of alcohol and 4,962 as drinkers. In 12 years of follow-up, 197 drinkers and 93 nondrinkers experienced a stroke. No significant relationships were noted between alcohol and thromboembolic stroke. When compared with nondrinkers, however, the risk of hemorrhagic stroke more than doubled for light drinkers and nearly tripled for those considered to be heavy drinkers. These findings are statistically significant and independent of hypertensive status and other risk factors. Results further indicate that alcohol has a greater effect on hemorrhagic strokes that are subarachnoid in origin, conferring a threefold to fourfold increased risk for moderate and heavy drinkers compared with nondrinkers.