Low bone mineral density is associated with balance and hearing impairments
Abstract
PURPOSE: Bone demineralization affects the skeletal system, including the temporal bone, which contains the cochlea and the vestibular labyrinth. However, research on the association of bone mineral density (BMD) with balance and hearing sensitivity is limited with conflicting results. Therefore, we examined the relationship in a population representative sample.
METHODS: We analyzed 8863 participants to the National Health and Nutrition Examination Survey (1999-2004) aged 40 years and older. Total and head BMD were measured by dual energy x-ray absorptiometry. Balance was evaluated using the Romberg Test of Standing Balance on Firm and Compliant Support Surfaces condition 4, also indicative of vestibular dysfunction. Hearing condition was self-reported. The associations of total and head BMD with balance and hearing were assessed using multiple and multinomial logistic regressions adjusting for covariates.
RESULTS: On multiple logistic regression, low total BMD was associated with balance impairment (odds ratio [OR], 2.21; 95% confidence interval [CI], 1.43-4.75), especially in older adults (≥65 years old; OR, 3.72; 95% CI, 1.07-12.85). In multinomial regression, low total BMD was associated with report of significant hearing impairment in older adults (OR, 5.30; 95% CI, 1.20-23.26).
CONCLUSIONS: Low BMD is associated with balance and hearing impairments, especially in older adults.
How strong is the evidence?
Evidence Hub reads this as a cross-sectional, done in people. Its evidence level is 4 of 5 (Low · observational). Observational designs can show an association but not prove cause. Reported size: 8,863 participants or records.
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