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Association between Hearing Loss and Cognitive Disorder: A Nationwide Population-Based Study

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Purpose: To investigate the relationship between hearing loss and cognitive disorder with memory dysfunction in South Koreausing data from the Korean Health Insurance claims database for 2009–2015. Materials and Methods: We analyzed cross-sectional data of 66-year-old individuals who completed the Korea National Healthand Nutrition Examination Surveys. Auditory function was evaluated using pure-tone audiometric testing. Cognitive disorder withmemory dysfunction was assessed using standardized scores of the Prescreening Korean Dementia Screening Questionnaire. Results: Among 1815835 participants at the age of 66 years, the prevalence of unilateral hearing loss was 5.84%, and that of bilateralhearing loss was 3.40%. The normal cognitive group comprised 86.35% of the participants, and the high-risk group for cognitivedisorder with memory dysfunction totaled 13.65% of the participants. The bilateral hearing loss group had the highest percentageof subjects who responded “sometimes or frequently” to all five questions about cognitive disorder with memory dysfunction,compared to the normal hearing group or the unilateral hearing loss group. After adjusting for sex, smoking status, alcohol intake,exercise, income, diabetes, hypertension, dyslipidemia, and depression, the odds ratios for cognitive disorder with memory dysfunctionwas 1.183 [95% confidence interval (CI): 1.163–1.203] for bilateral hearing loss and 1.141 (95% CI: 1.126–1.156) for unilateralhearing loss, compared to the normal cognitive group. Conclusion: Hearing loss has a significant effect on cognitive function in the Korean population. In our study, individuals withbilateral hearing loss showed poorer cognitive function than those with unilateral hearing loss.

Abstract

Purpose: To investigate the relationship between hearing loss and cognitive disorder with memory dysfunction in South Koreausing data from the Korean Health Insurance claims database for 2009–2015. Materials and Methods: We analyzed cross-sectional data of 66-year-old individuals who completed the Korea National Healthand Nutrition Examination Surveys. Auditory function was evaluated using pure-tone audiometric testing. Cognitive disorder withmemory dysfunction was assessed using standardized scores of the Prescreening Korean Dementia Screening Questionnaire. Results: Among 1815835 participants at the age of 66 years, the prevalence of unilateral hearing loss was 5.84%, and that of bilateralhearing loss was 3.40%. The normal cognitive group comprised 86.35% of the participants, and the high-risk group for cognitivedisorder with memory dysfunction totaled 13.65% of the participants. The bilateral hearing loss group had the highest percentageof subjects who responded “sometimes or frequently” to all five questions about cognitive disorder with memory dysfunction,compared to the normal hearing group or the unilateral hearing loss group. After adjusting for sex, smoking status, alcohol intake,exercise, income, diabetes, hypertension, dyslipidemia, and depression, the odds ratios for cognitive disorder with memory dysfunctionwas 1.183 [95% confidence interval (CI): 1.163–1.203] for bilateral hearing loss and 1.141 (95% CI: 1.126–1.156) for unilateralhearing loss, compared to the normal cognitive group. Conclusion: Hearing loss has a significant effect on cognitive function in the Korean population. In our study, individuals withbilateral hearing loss showed poorer cognitive function than those with unilateral hearing loss.

참고문헌 (30)

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