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Methylxanthines and breast cancer.
C Schairer1, L A Brinton, R N Hoover
1Environmental Epidemiology Branch, National Cancer Institute, Bethesda, MD 20892.
International Journal of Cancer
|October 15, 1987
Summary
This study found no link between methylxanthine intake and breast cancer risk. Some evidence suggests a potential protective effect, especially for women over 50.
Area of Science:
- Oncology
- Nutritional Epidemiology
Background:
- Methylxanthines, including caffeine, are widely consumed globally.
- Previous research on methylxanthine consumption and breast cancer risk has yielded inconsistent results.
- Understanding dietary factors' role in breast cancer etiology is crucial for prevention strategies.
Purpose of the Study:
- To investigate the association between methylxanthine consumption and the risk of developing breast cancer.
- To explore potential dose-response relationships and effects based on age at diagnosis and consumption timing.
Main Methods:
- A population-based case-control study was conducted.
- Data included 1,510 breast cancer cases and 1,882 controls from a national screening program.
- Methylxanthine intake was assessed, along with consumption of specific beverages like coffee and tea.
Main Results:
- No statistically significant positive association was observed between overall methylxanthine consumption and breast cancer risk.
- A potential inverse association was suggested, particularly in women diagnosed with breast cancer after age 50.
- No increased risk was linked to past or recent methylxanthine intake, or consumption of caffeinated coffee or tea.
Conclusions:
- Current methylxanthine consumption does not appear to increase breast cancer risk.
- Findings suggest a possible protective association, warranting further investigation.
- Dietary habits, including beverage choices, may play a complex role in breast cancer development.