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Bone mineral density and changes in bone metabolism in patients with obstructive sleep apnea syndrome

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Abstract

The aim of this study was to evaluate the differences between patients with obstructive sleep apnea syndrome (OSAS) and phenotypically similar subjects without OSAS in terms of bone mineral density (BMD) and bone turnover markers. The study was conducted on 30 males diagnosed with OSAS and 20 healthy males. All subjects underwent polysomnographic testing. Calcium, phosphorus parathyroid hormone, thyroid stimulating hormone, bone-specific alkaline phosphatase, 25-hydroxyvitamin D3, osteocalcin, and beta-CrossLaps (β-CTx) were measured. BMD in the lumbar spine (L1–L4) and femoral neck was measured by dual energy X-ray absorptiometry. There was no statistically significant difference between the two groups in terms of demographic data with the exception of bone mass index and waist circumference. (p < 0.05). Analyses showed significantly lower BMD measurements in the femoral neck and T-scores in the femoral neck in patients diagnosed with OSAS. Serum β-CTx levels were found to be statistically significantly higher in the OSAS group (p = 0.017). In multivariate assessments performed for apnea/hypopnea index values, mean saturation O2 levels were found to be significantly associated with osteocalcin levels and neck BMD. OSAS patients might represent a risk group with respect to loss of BMD and bone resorption. It is important to evaluate bone loss in these patients. Further studies should be carried out on larger study populations to evaluate the effects of chronic hypoxia on BMD in detail.

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Conflict of interest

The authors declared no conflict interest.

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Authors and Affiliations

  1. Department of Physical Medicine and Rehabilitation, Derince Training and Research Hospital, Kocaeli, Turkey

    Rabia Terzi

  2. Department of Neurology, Derince Training and Research Hospital, Kocaeli, Turkey

    Zahide Yılmaz

Authors
  1. Rabia Terzi
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  2. Zahide Yılmaz
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Correspondence to Rabia Terzi.

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Terzi, R., Yılmaz, Z. Bone mineral density and changes in bone metabolism in patients with obstructive sleep apnea syndrome. J Bone Miner Metab 34, 475–481 (2016). https://doi.org/10.1007/s00774-015-0691-1

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  • DOI: https://doi.org/10.1007/s00774-015-0691-1

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