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  • Title: Disordered-eating attitudes in relation to bone mineral density and markers of bone turnover in overweight adolescents.
    Author: Schvey NA, Tanofsky-Kraff M, Yanoff LB, Checchi JM, Shomaker LB, Brady S, Savastano DM, Ranzenhofer LM, Yanovski SZ, Reynolds JC, Yanovski JA.
    Journal: J Adolesc Health; 2009 Jul; 45(1):33-9. PubMed ID: 19541247.
    Abstract:
    PURPOSE: To examine the relationships between cognitive eating restraint and both bone mineral density (BMD) and markers of bone turnover in overweight adolescents. METHODS: One hundred thirty-seven overweight (BMI 39.1 +/- 6.8 kg/m(2)) African American and Caucasian adolescent (age = 14.4 +/- 1.4 years) girls (66.4%) and boys were administered the Eating Disorder Examination (EDE) interview and Eating Inventory (EI) questionnaire and underwent dual energy X-ray absorptiometry (DXA) to measure total lumbar spine BMD. Markers of bone formation (serum bone specific alkaline phosphatase and osteocalcin), bone resorption (24-hour urine N-telopeptides), and stress (urine free cortisol) were measured. RESULTS: After accounting for the contribution of demographics, height, weight, serum 25-hydroxyvitamin D, and depressive symptoms, adolescents' weight concern, as assessed by interview, was a significant contributor to the model of urine free cortisol (beta = .30, p < .05). Shape concern, as also assessed by interview, was significantly associated with lumbar spine bone mineral density (beta = -.15, p < .05). Dietary restraint was not a significant predictor in any of these models. CONCLUSIONS: These findings suggest that among severely overweight adolescents, dissatisfaction with shape and weight may be salient stressors. Future research is required to illuminate the relationship between bone health and disordered-eating attitudes in overweight adolescents.
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