Abstract
Summary
Using national insurance claims of Taiwan, we found that magnesium oxide (MgO) use is associated with an increased risk of hip fracture in the elderly. Further studies are warranted to explore the mechanisms associated with MgO use that lead to hip fracture.
Purpose
The purpose of this study was to investigate the association between MgO use and hip fracture risk in the elderly (age > 65 years).
Methods
This nationwide population-based retrospective study was conducted from 1996 to 2013. Individuals with (n = 26,069) and without (n = 26,069) MgO use were enrolled after propensity score matching. Primary outcome was a hip fracture. After adjusting for age, sex, comorbidities, and medications, multivariate Cox proportional hazards regression models were used to calculate incidences and risk of hip fracture [hazard ratio (HR)].
Results
During the mean follow-up duration of 4.8 years in the MgO cohort and 5.7 years in the non-MgO cohort, respectively 1547 and 1107 cases developed a hip fracture. MgO use was identified as a risk factor for hip fracture in both univariate [crude HR, 1.68; 95% confidence interval (CI), 1.55–1.81; p < 0.001] and multivariate [adjusted HR (aHR), 1.66; 95% CI, 1.54–1.80; p < 0.001] Cox proportional hazards regression models. The cumulative incidence of hip fracture was significantly higher in the MgO cohort than in the non-MgO cohort (1.23 per 100 person-years vs. 0.74 per 100 person-years, logrank test, p < 0.001).
Conclusion
MgO use is an independent risk factor for hip fracture in the elderly.
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Funding
This work was supported by grants from the Ministry of Health and Welfare, Taiwan (MOHW108-TDU-B-212-133004), China Medical University Hospital, Academia Sinica Stroke Biosignature Project (BM10701010021), MOST Clinical Trial Consortium for Stroke (MOST 108-2321-B-039-003-), Tseng-Lien Lin Foundation, Taichung, Taiwan, and Katsuzo and Kiyo Aoshima Memorial Funds, Japan.
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This study was approved by the ethics review board of China Medical University (CMUH-104-REC2–115).
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Ying-Ying Wu, Chia-Ling Chang, Jen-Hung Wang, and Wei-Ting Wei declare that they have no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Wu, Y., Chang, C., Wang, J. et al. Magnesium oxide and hip fracture in the elderly: a population-based retrospective cohort analysis. Osteoporos Int 31, 1231–1238 (2020). https://doi.org/10.1007/s00198-020-05278-3
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DOI: https://doi.org/10.1007/s00198-020-05278-3