- 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.
- Some study group sample sizes were small (for example, those that drank heavily)
- Researchers also lacked data on diet and exercise, which can influence the risk of breast cancer, and they didn’t know why some women chose to abstain from drinking.
- 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.
- The link between alcohol and breast cancer is well documented for White women. The conclusions of this current study are similar in that among African American women, increased alcohol intake is associated with an increased risk of breast cancer.
- As clearly pointed out by the authors, alcohol is a modifiable risk factor and therefore of significant relevance to young breast cancer survivors and those at high risk regardless of race.