ArticleResearch square2025
Hearing loss and cognitive function among older adults in 18 high-income countries: Moderating and Mediating factors.
Article in Research square, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Hearing loss is a major, potentially modifiable risk factor for cognitive impairment, but its moderating and mediating factors remain underexplored in cross-national settings. Methods: We used the data from a cross-national survey, the Survey of Health, Ageing and Retirement in Europe (SHARE). 38,506 participants aged 65 and above across 17 European countries and Israel from SHARE wave 6 were included. The study applied the Double Machine Learning (DML) approach to evaluate the association of hearing aid use with cognitive function in older adults, and to test demographic moderators and psychosocial mediators. Results: Hearing loss was significantly associated with poorer cognitive performance in temporal orientation (coefficient = -0.061; 95% CI: [-0.076, -0.045]), memory (-0.448; 95% CI: -0.520, -0.375]), numeracy (-0.061; 95% CI: [-0.092, -0.030]), and verbal fluency (-0.379; 95% CI: [-0.529, -0.229]). The associations varied by gender, education and age group, such as stronger associations with verbal fluency of women, and memory of higher educated individuals. Mediation analyses indicated that the negative associations of hearing loss with cognitive function may be partially explained by increased feelings of isolation, loneliness and depression. Conclusion: This study highlights the cognitive burden of hearing loss in later life and underscores the importance of early detection and intervention. Addressing psychosocial consequences of hearing impairment may help mitigate its impact on cognitive health. Further longitudinal research is needed to validate these findings and clarify causal pathways.
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