clomid and nolvadex pct Adjusted for energy intake, age at baseline, ethnicity, educational level, age at menarche, age at menopause, parity, age at first full term pregnancy, oral contraceptive use, postmenopausal hormone use, BMI, physical activity, alcohol drinking, dietary folate intake, tobacco smoking, hysterectomy, bilateral oophorectomy, history of benign breast disease, family history of breast cancer, and the nutrients listed in the table in the Cox proportional hazards models