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Figure 2 Algorithm for Determining Menopausal Status in the Dallas Heart Study

See text for details. The group distributions are pre-menopausal women, n = 939; post-menopausal, n = 692; and unclear hormonal status, n = 340. BSO = bilateral salpingo-oophorectomy; FSH = follicle-stimulating hormone; LMP = last menstrual period; PCOS = polycystic ovarian syndrome.