- This is most relevant for African American women who would like to lower their breast cancer risk.
- The link between alcohol and breast cancer is well documented for White women. This study shows that among African American women, increased alcohol intake is associated with an increased risk of breast cancer.
- Alcohol intake is a modifiable risk factor.
Strength of Science: Medium
- The results of this study were derived by pooling data from 4 individual studies. Pooling data may hide differences between the studies.
- The authors provided detailed information on how the AMBER Consortium data on 22,000+ study participants (cases and controls) was obtained and analyzed. Researchers gathered alcohol intake and frequency data directly from all participants via questionnaires.
- Recall bias (a participant’s ability to remember their alcohol consumption) likely impacted the results of this study.
- Some study group sample sizes were small (for example, those that drank heavily)
- Researchers also lacked data on diet and exercise, which can impact breast cancer risk.
- It is not known why some women chose to avoid drinking alcohol.
- While this study is not a controlled experiment designed to prove whether or how alcohol causes breast cancer, the large sample size and detailed alcohol use reported by participants support the conclusions.