Background: Aging is related to deterioration of bodily and neural functions, leading to various disorders and symptoms, including the development of dementia, hearing loss, or tinnitus. Understanding how these phenomena are intertwined and how aging affects those is crucial for prevention and the future development of interventions. Methods: We utilized the UK Biobank which includes a total of 502,382 participants between 40 and 70 years old. We used logistic regression models and cox proportional hazard models and compared hazard ratios. Results: The odds of reporting tinnitus in the older age group (i.e., older than 58 years) were increased by 43.3% and a one decibel increase in the SRT enhanced the odds for tinnitus by 13.5%. For our second analysis regarding hearing loss, the risk of dementia increased by 9.2% with an increase by one decibel in the SRT score. In terms of aging, each additional year increased the risk by 19.2%. Tinnitus alone showed a significant influence with a hazard ratio of 52.1%, however, when adding hearing loss, age and various covariates, the effect vanished. Conclusion: Findings confirm that tinnitus is indeed related to aging, but presumably independent of the aging processes accompanying the development of dementia. This highlights the urge to further investigate the impact of aging on neural processes that are relevant for alterations in the auditory systems (e.g., leading to the development of tinnitus or hearing loss) as well as for increased vulnerability in terms of neurodegenerative diseases. Keywords: ageing, dementia, hearing loss, tinnitus, UK Biobank

The authors have declared no competing interest.

This study was funded by Land Salzburg (Hidden Hearing Loss, 20204-WISS/225/288/4-2021).

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The details of the IRB/oversight body that provided approval or exemption for the research described are given below:

The UK Biobank Ethics Advisory Committee (EAC) is a Committee of the UK Biobank Board

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Data was derived from the UK Biobank and cannot be shared by the authors, since the UK Biobank restricts the data access to those researchers with an approved research proposal.