Abstract
Summary
We performed a systematic review of the literature to assess the association between sleep apnea and bone metabolism diseases including osteoporosis in adult population. Results from clinical trials suggest that the association between sleep apnea and low bone mass in adults is possible.
Introduction
This study aimed to synthesize existing evidence on the potential association between sleep apnea and low bone mass in adults.
Methods
Electronic searches of five databases were performed. The inclusion criteria consisted of studies in humans that assessed potential associations between sleep apnea and bone metabolic diseases in an adult population. For diagnosis of sleep apnea overnight polysomnography, home polygraphy, or validated records from healthcare databases were considered. Reduced bone density, osteoporosis, serum/urinary levels for markers of bone formation and resorption, or risk of fractures caused without history of trauma were considered indicators of low bone mass. A random-effects model meta-analysis was applied when possible.
Results
Of the 963 relevant references, 12 studies met our inclusion criteria and were assessed to be of medium to low bias. Nine out of 12 studies reported an association between sleep apnea and low bone mass (increased bone resorption markers, reduced bone density, and higher risk of osteoporosis). Two studies did not report a significant association, whereas one study reported an increase of bone density in sleep apnea patients compared to non-sleep apnea patients. Meta-analysis of 2 studies (n = 112,258 patients) showed that sleep apnea was a significant risk factor for osteoporosis (odds ratio (OR), 1.92; 95%CI, 1.24 to 2.97; I2 = 66%); females only had an OR of 2.56 (95% CI, 1.96 to 3.34; I2 = 0%) while the OR in males was 2.03 (95% CI, 1.24 to 3.35; I2 = 38%).
Conclusions
An association between sleep apnea and low bone mass in adults is plausible, but supporting evidence has a risk of bias and is inconsistent.
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Acknowledgments
This work was supported by the operating grant from the Alberta Innovates—Health Solutions (AIHS, Grant RES0027174) and a studentship to Hazem Eimar and Humam Saltaji from the AIHS. We also thank Liza Chan for her excellent technical support.
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Eimar, H., Saltaji, H., Ghorashi, S. et al. Association between sleep apnea and low bone mass in adults: a systematic review and meta-analysis. Osteoporos Int 28, 1835–1852 (2017). https://doi.org/10.1007/s00198-017-3912-8
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DOI: https://doi.org/10.1007/s00198-017-3912-8