The number of cutaneous nevi and breast cancer risk by estrogen and progesterone receptor status.

aAdjusted for age, menopausal status, age at menarche, parity and age at first birth, body mass index, body mass index at age 18 y, height, physical activities, multivitamin use, family history of breast cancer in a first-degree relative, cigarette smoking, alcohol consumption, self-report of benign breast disease, as well as duration of menopause and hormone use among postmenopausal women.