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Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
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Related Experiment Video

Updated: Jul 29, 2025

Cryosectioning and Immunostaining Mouse Inner Ear Tissue: From Embryonic to Adult Stages
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Hearing Loss and Dementia: A Population-Based Cohort Study.

Keshinisuthan Kirubalingam1, Paul Nguyen2, Daniel Newsted3

  • 1Queen's University School of Medicine, Otolaryngology Head and Neck Surgery, Kingston, Ontario, Canada, kkirubalingam@qmed.ca.

Dementia and Geriatric Cognitive Disorders
|May 26, 2023
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Summary

Hearing loss (HL) increases dementia risk. Adults with hearing aids had a 10% higher risk of dementia diagnosis, with risk increasing over time and with bilateral devices.

Keywords:
AgingDementiaHearing loss

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Area of Science:

  • Gerontology
  • Epidemiology
  • Neuroscience

Background:

  • Hearing loss (HL) is a significant modifiable risk factor for dementia.
  • Understanding the link between HL and dementia is crucial for public health strategies.

Purpose of the Study:

  • To investigate the association between hearing loss and the incidence of dementia diagnosis.
  • To analyze the risk of dementia in individuals using hearing amplification devices (HADs).

Main Methods:

  • A population-based cohort study utilized administrative healthcare databases.
  • Matched controls were used for comparison with 257,285 HAD claimants and 1,005,010 controls.
  • Cox regression analysis assessed dementia incidence and risk factors.

Main Results:

  • Dementia incidence was higher in HAD claimants (19.51/1000 person-years) versus controls (14.15/1000 person-years).
  • Adjusted analyses revealed a 10% increased dementia risk in HAD claimants (HR: 1.10).
  • Dose-response and exposure-response gradients were observed for bilateral HADs and over time.

Conclusions:

  • Adults with hearing loss exhibit an elevated risk of dementia diagnosis.
  • Further research into the impact of hearing interventions on dementia risk is warranted.