Figure 4.

Breast cancer mortality by estrogen plus progestin use at baseline. Panels depict (A) deaths from breast cancer (deaths directly attributed to the cancer) and (B) deaths after breast cancer (deaths from all causes after the cancer). Analyses were adjusted for age, race or ethnic group, body mass index, education, smoking status, alcohol use, self-reported health, level of physical activity, presence or absence of a family history of breast cancer, estimated breast-cancer risk based on the Gail model, and bilateral oophorectomy. All statistical tests were two-sided. CI = confidence interval; HR = hazard ratio.