What this means
Poorer hearing went with more loneliness and weaker word recall. The studies found little proof that loneliness is what causes memory decline from hearing loss.
Plain-English summary written by an AI model from the abstract. The original is below.
- Who it was tested in
- 10,375 older European adults, followed for up to 18 years
- Kind of research
- A study
The science
- Original title
- Loneliness as a pathway linking hearing decline to cognitive aging: Longitudinal and genetic evidence.
- Authors
- Yang S, Grilli MD, Wootton RE et al.
- Journal
- Alzheimer's & dementia : the journal of the Alzheimer's Association
- Published
- Oct 28, 2026
- Study type
- Study · in humans
- PMID
- 42949226 ↗
Abstract
Background
Hearing loss and loneliness are potentially modifiable risk factors for cognitive decline and dementia, but it remains unclear whether loneliness represents a causal pathway linking hearing loss to cognitive aging or whether these associations reflect shared vulnerability.
What they did
We combined up to 18 years of data from the Survey of Health, Ageing and Retirement in Europe (SHARE; N = 10,375) with summary statistics from eight primary genome-wide association study sources and an independent neuroticism dataset used in sensitivity analyses. Parallel-process latent growth curve models examined level and change associations; additional analyses evaluated hearing-aid moderation, Mendelian randomization, multivariable Mendelian randomization, and colocalization.
What they found
At Wave 7, poorer hearing, greater loneliness, and poorer word-recall performance were associated, with a significant indirect association through loneliness. Evidence for coordinated longitudinal mediation was limited, and the primary change-to-change indirect effect was not significant. Current, but not cumulative, hearing-aid use was associated with a weaker concurrent hearing-loneliness association. Genetic analyses provided little evidence for direct or loneliness-mediated causal effects of hearing phenotypes on Alzheimer's disease or all-cause dementia. Results were more consistent with shared liability, including overlap with neuroticism. The findings support late-life associations among hearing difficulty, loneliness, and cognitive performance but provide limited evidence that loneliness is a primary causal pathway linking hearing loss to cognitive aging. Integrating longitudinal and genetic evidence suggests a more complex etiology involving shared liability and supports direct evaluation of hearing care and social connection in intervention studies.
The authors' abstract, grouped under plain headings from its own section labels.
Yang S, Grilli MD, Wootton RE et al. Loneliness as a pathway linking hearing decline to cognitive aging: Longitudinal and genetic evidence. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2026. doi:10.1002/alz.71950. PMID: 42949226. https://pubmed.ncbi.nlm.nih.gov/42949226/
Related research
The underlying neurobiology of social isolation and loneliness in middle-older adults: A systematic review.
Social isolation and loneliness are distinct but overlapping dementia risk factors, though their underlying neurobiological mechanisms remain unclear.
Making Brain Health Actionable for Older Persons in Primary Care: The Proposed SHAPES Framework.
Brain health is increasingly recognised as a life-course priority, but its translation into routine primary care for older persons remains uncertain.
Whose Diet Suffers When Social Ties Change? Inter-Related Socioeconomic and Gender Inequalities in the Canadian Longitudinal Study on Aging Cohort.
Background: Prior cohort studies have established average associations between social ties and dietary intake among aging adults, but socioeconomic status (SES) and gender differences remain unclear.
Structural Social Connection, Biological Ageing, and Neurodegenerative Disease Burden: A Global Ecological Analysis of Household Size and Modelled Dementia…
BACKGROUND: Poor social connection and ageing-related biological processes are recognised contributors to Alzheimer's disease and related dementias.
A Longitudinal Study on Social Isolation, Chronic Diseases, and Depressive Symptoms: Evidence From the Korean Longitudinal Study of Aging.
ObjectiveThis study examined the longitudinal effects of social isolation on chronic diseases and depressive symptoms among middle-aged and older adults in South Korea, with attention to gender and age…
The Indirect Association of Psychological Well-Being in the Relationship Between Social Anxiety and Loneliness Among Older Adults: A Cross-Sectional Study in…
BACKGROUND: Population ageing and its associated challenges have become a significant public health issue globally. Like other countries, Iran is witnessing a rapid increase in the number of older adults.
See all research on Staying socially connected →