Bone density estimates and risk factors for osteoporosis in young women.

The bone mineral density (BMD) of the calcaneus was estimated in 185 young women from the United Arab Emirates, using SAHARA ultrasound. All participants completed a questionnaire on factors potentially associated with osteoporosis. In all, 29 (15.7%) of the women were classified as having osteopenia and none as having osteoporosis. Participants with osteopenia were more likely to have had a later onset of menarche, irregular periods, lower body mass index, and a positive family history of osteoporosis. Only late menarche and low body mass index, however, were independent predictors of osteopenia.