Odds ratios for breast cancer among current users of menopausal hormone therapy by time interval between start of menopause and start of MHT use^<b>a</b>.

aAnalyses restricted to current users of MHT who used only one type of MHT bOdds Ratios adjusted for study area / Age at reference date/ Age at menarche / Parity / Age at first full-term pregnancy / Breast feeding /History of benign breast disease / Family history of breast cancer in first degree relatives / BMI / Oral contraceptive use.