Metabolic Syndrome Is not an Independent Risk Factor for Hearing Impairment

Area of Science:

• Public Health
• Audiology
• Metabolic Health

Background:

• Metabolic syndrome (MS) is a cluster of conditions that increase the risk of heart disease, stroke, and type 2 diabetes.
• Hearing impairment (HI) is a growing public health concern, affecting communication and quality of life.
• The relationship between MS and HI requires further investigation in diverse populations.

Purpose of the Study:

• To examine the association between metabolic syndrome and hearing impairment in a large, nationally representative sample of Korean adults.
• To identify specific components of metabolic syndrome that may contribute to hearing impairment.
• To explore risk factors for different types of hearing impairment (low-frequency vs. high-frequency).

Main Methods:

• Analysis of data from 16,799 Korean adults (aged ≥19 years) from the fifth Korea National Health and Nutrition Examination Survey (2010-2012).
• Pure tone audiometry was used to assess hearing impairment.
• Logistic regression analysis was employed to determine independent risk factors for hearing impairment, stratified by metabolic syndrome status.

Main Results:

• Metabolic syndrome was not found to be an independent risk factor for hearing impairment.
• Elevated fasting plasma glucose was independently associated with hearing impairment (OR 1.4, 95% CI: 1.1-1.8).
• Other independent risk factors for HI included older age, male sex, low BMI, lower education, smoking, and occupational noise exposure.

Conclusions:

• Metabolic syndrome itself is not an independent predictor of hearing impairment.
• Increased fasting plasma glucose is the primary metabolic component linked to hearing impairment.
• Understanding these associations can inform targeted public health interventions for hearing health.