Dementia in a Hearing-impaired Population According to Hearing Aid Use: A Nationwide Population-based Study in Koreaopen access
- Authors
- Byun, Hayoung; Chung, Jae Ho; Lee, Seung Hwan; Kim, Eun Mi; Kim, Inah
- Issue Date
- Nov-2022
- Publisher
- LIPPINCOTT WILLIAMS & WILKINS
- Keywords
- Cognitive function; Dementia; Hearing aid; Hearing loss
- Citation
- EAR AND HEARING, v.43, no.6, pp.1661 - 1668
- Indexed
- SCIE
SCOPUS
- Journal Title
- EAR AND HEARING
- Volume
- 43
- Number
- 6
- Start Page
- 1661
- End Page
- 1668
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/172921
- DOI
- 10.1097/AUD.0000000000001249
- ISSN
- 0196-0202
- Abstract
- Background: Hearing loss is considered a potentially modifiable risk factor for dementia. However, the effect of use of a hearing aid on the development of dementia has not been clearly established. We aimed to assess the incidence of dementia in hearing-impaired individuals according to hearing aid use in a nationwide population-based cohort study with matched controls. Methods: This was a retrospective, longitudinal, cohort study of South Korean national claims data for individuals newly registered with hearing disabilities (better ear >= 40 dBHL with worse ear >= 80 dBHL, or better ear >= 60 dBHL) between 2004 and 2008. The hearing aid cohort comprised individuals who received hearing aid subsidies from the National Health Insurance within a year from disability registration. The comparison cohort comprised individuals without a record of a hearing aid claim during the study period after 1:1 matching for audiologic and sociodemographic factors with the hearing aid cohort. The occurrence of dementia was followed up until 2018. Results: Each cohort comprised 8780 individuals. Overall incidence of dementia in the hearing aid and comparison cohorts were 156.0 and 184.5 per 10,000 person-years, respectively (incidence rate ratio = 0.85, 95% confidence interval 0.79-0.91). In a multivariable analysis of the whole study populations, hearing aid use (hazard ratio = 0.75, 95% confidence interval 0.70-0.81) attenuated the risk of dementia. Conclusions: Dementia incidence in individuals with hearing disabilities was lower in hearing aid users than that in nonusers. Hearing rehabilitation with hearing aids should be encouraged for individuals with hearing loss.
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