Fig. 1: Bone mineral density (BMD) of premenopausal women adjusted for age, body mass index (BMI) and height at each BMD measurement site. OC use refers to women who have used oral contraceptives (OCs) for 3 months or more, and no OC use refers to women who have never used OCs or have used OCs for less than 3 months. *These confidence intervals are statistically significant.