consumption was modestly but significantly associated with breast cancer risk (for 5-9.9 grams/day (equivalent to 3-6 glasses of wine per week) multivariate (MV) RR 1.15 (95% CI 1.06-1.24) 332 cases/100,000 person-years). In addition, women who consumed at least 30 grams/alcohol daily on average (at least 2 drinks per day) had a greater risk of breast cancer (RR 1.51 (95% CI 1.35-1.70) 413 cases/100,000 person-years)compared to those who never consumed alcohol. The percent attributable risk (PAR) for each alcohol category in the study population is still low (1-3%) given the low prevalence of higher levels of alcohol consumption, but the PAR for alcohol overall was 10%.
