Characteristics of the study participants and associated RRs and corresponding 95% CIs for breast cancer by menopausal status.

1Analyses were adjusted for all characteristics presented in the table, as well as height, educational level, alcohol consumption, and personal history of benign disease.2Includes women who reported no oral contraceptive use at baseline and did not complete the follow-up questionnaire.3Includes women who reported no hormone therapy use at baseline and did not complete the follow-up questionnaire.Abbreviations: n, number of participants, RR, relative risk.