Hearing aids tied to lower mortality risk in large international study
Over a billion people worldwide live with hearing loss. Hearing aids are seen as a practical fix. But new large-scale research suggests the benefits may extend well beyond hearing itself.
Researchers pooled data from nearly fourteen thousand participants across Australia, Iceland, and the United States, examining how hearing loss related to mortality and whether wearing a hearing aid made a difference. The study found that moderate to severe hearing loss was associated with a 55 to 56 percent higher all-cause mortality risk compared to normal hearing. Among people with hearing loss, those who used a hearing aid had notably lower mortality risk than those who did not.
Heart disease and the brain as possible pathways
Cardiovascular mortality was also elevated in people with hearing loss. The researchers propose two explanations. One is that hearing aid users may take better care of their health more broadly. The other involves the brain: untreated hearing loss is known to accelerate neurodegeneration (the progressive loss of nerve cells), which may in turn affect the cardiovascular system through connected neural pathways.
The study used an individual participant data meta-analysis, meaning raw data from several large cohorts were pooled and reanalysed. A separate replication study in Norway produced consistent results. Participants had a mean age of nearly 62 years. The dataset also included younger adults aged 20 to 49, a group often overlooked in previous research.
An observational finding, not proof of causation
This is observational research: the authors cannot prove that hearing aids themselves cause the lower mortality risk. People who choose to use hearing aids may differ from non-users in other health-relevant ways. Still, the consistency across multiple countries and datasets is notable. From a longevity perspective, untreated sensory loss appears to be a marker for a higher overall burden of aging-related damage. Whether treating hearing loss is causally life-extending remains to be demonstrated in future research.
Search terms: hearing loss mortality risk, neurodegeneration cardiovascular mortality, age-related sensory loss aging