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Alcohol and breast cancer
R A Hiatt1, A Klatsky, M A Armstrong
1Division of Research, Kaiser Permanente, Piedmont, Oakland, California 94611-5463.
Preventive Medicine
|November 1, 1988
Summary
Increased alcohol consumption is linked to a higher risk of breast cancer in women. Heavy drinking, especially, showed a significantly elevated relative risk, suggesting alcohol is a potential risk factor.
Area of Science:
- Epidemiology
- Oncology
- Public Health
Background:
- Understanding lifestyle factors influencing cancer development is crucial for prevention.
- Alcohol consumption is a widespread behavior with potential health implications.
Purpose of the Study:
- To investigate the association between alcohol consumption and breast cancer incidence.
- To quantify the relative risk of breast cancer associated with different levels of alcohol intake.
Main Methods:
- Prospective cohort study of approximately 69,000 women.
- Detailed questionnaires on alcohol consumption collected between 1979 and 1984.
- Multivariate analyses controlled for age, race, body mass index, and smoking status.
Main Results:
- A dose-response relationship observed between alcohol intake and breast cancer incidence.
- Relative risk for 6+ drinks/day was 3.3 (95% CI 1.2-9.3) after adjusting for confounders.
- Past heavy drinkers had a relative risk of 2.2 (95% CI 1.2-3.9).
- Associations were strongest among white and postmenopausal women.
Conclusions:
- Alcohol consumption is a significant risk factor for breast cancer development.
- Findings support the growing body of evidence linking alcohol to increased breast cancer risk.