Abstract
Objective
To determine body composition predictors of skeletal integrity in overweight/obese subjects using dual energy X-ray absorptiometry (DXA). We hypothesized that visceral adiposity would be negatively, and lean mass positively, associated with DXA measures of skeletal integrity in obesity.
Materials and methods
Our study was institutional review board (IRB)-approved and Health Insurance Portability and Accountability Act (HIPAA)-compliant and written informed consent was obtained. We studied 82 overweight or obese, but otherwise healthy premenopausal women and men of similar age who were part of a clinical trial (mean age: 37 ± 10 years, mean BMI: 34 ± 7 kg/m2). All subjects underwent DXA of the spine and hip for assessment of bone mineral density (BMD), trabecular bone score (TBS), and hip structural analysis (HSA), and of the whole body for the assessment of body composition, including estimated visceral adipose tissue (VAT).
Results
Sixty-three subjects (77 %) had normal BMD and 19 subjects (23 %) had osteopenia. There were strong age-, sex-, and BMD-independent positive associations between lean mass and HSA parameters (r = 0.50 to r = 0.81, p < 0.0001), whereas there was no association with TBS. There were strong age-, sex- and BMD-independent inverse associations between total fat and VAT mass and TBS (r = −0.60 and r = −0.72, p < 0.0001 for both correlations), whereas there were no associations with HSA parameters.
Conclusion
Lean mass is a positive predictor of hip geometry, whereas fat and VAT mass are negative predictors of trabecular microarchitecture in overweight/obese subjects.
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Funding
This study was supported by NIH grants R01 DK095792, K24 HL092902 and UL1 RR-025758.
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The authors declare that they have no conflict of interest.
Ethical approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Clinical trials number: NCT01724489
Karen K. Miller and Miriam A. Bredella contributed equally to this work
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Schorr, M., Dichtel, L.E., Gerweck, A.V. et al. Body composition predictors of skeletal integrity in obesity. Skeletal Radiol 45, 813–819 (2016). https://doi.org/10.1007/s00256-016-2363-1
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DOI: https://doi.org/10.1007/s00256-016-2363-1