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Medroxyprogesterone Acetate and Bone Density in Adolescents.

机译:青少年醋酸甲羟孕酮和骨密度。

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The purpose of this research is to determine if the young female's use of DMPA affects bone remodeling. 60 participants, age 14-21, will be followed at zero, three, six, nine and 12 months. Dual energy x-ray absorbtiometry will be used to obtain BMD at the initial visit and at six-month intervals. Blood samples for cross-linked N-telopeptides, estradiol and dihydroepiandrostendione sulfate (DHEAS) will be obtained prior to initiation of DMPA and every 12 weeks prior to each DMPA injection. Exploratory analysis will be used to examine the overall sample and individual pattern of BMD and biochemical variables. Sign tests will be performed in which individual's measures at 6 and 12 months are compared to their baseline level. Descriptive statistics will be used to describe age, race, socioeconomic status, height, weight, body mass index (BMI), calcium intake, physical activity, tobacco and alcohol use. This information will be obtained during a structured interview.

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