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KMID : 1195620210140030278
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Clinical and Experimental Otorhinolaryngology
2021 Volume.14 No. 3 p.278 ~ p.286
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Hearing Impairment Increases Economic Inequality
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Kim So-Young
Min Chan-Yang
Yoo Dae-Myoung
Chang Ji-Won
Lee Hyo-Jeong
Park Bum-jung
Choi Hyo-Geun
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Abstract
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Objectives: We evaluated changes in income levels in a hearing-impaired population.
Methods: The study subjects were selected from the Korean National Health Insurance Service-Health Screening Cohort data from 2002 to 2015 of Koreans ≥40 years old. In total, 5,857 hearing-impaired subjects were matched with 23,428 comparison participants. Differences between the initial income level and income levels at 1, 2, 3, 4, and 5 years post-enrollment were compared between the hearing-impaired and comparison groups. The interaction of time and hearing impairment/comparison was estimated.
Results: Both the hearing-impaired group and the comparison group showed increased income levels over time. In the hearing-impaired group, the income levels at 4 and 5 years post-enrollment were higher than the initial income level (each P<0.001). In the comparison group, the income levels of all the participants after 1?5 years were higher than the initial income level (each P<0.001). The interaction of time and hearing impairment was statistically significant (P=0.021).
Conclusion: The increase in income over time was relatively lower in the hearing-impaired adult population; therefore, the income gap widened between this population and the normal-hearing population.
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KEYWORD
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Hearing Loss, Economic Status, Income, Cohort Studies
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