- Design
- Cross-sectional cohort analysis with amyloid PET
- Population
- 223 adults, mean age 65.6
- Primary outcome
- Regional and global amyloid SUVR
- Effect
- Per 10% worse word recognition: global SUVR +0.064 (P = 0.005)
In a US cohort of 223 people with a mean age of 66 and largely normal hearing, researchers compared hearing with amyloid PET.
Each 10-point fall in better-ear word recognition score was associated with higher amyloid across several regions and globally (global β 0.064 SUVR, P = 0.005). Pure-tone average was significant only in the left temporal region. The associations were small and seemed to be driven by the people with the worst hearing and highest amyloid.
This adds to the link between hearing loss and dementia, but it cannot say which comes first or whether treating hearing loss changes amyloid. It supports testing speech understanding, not just tones.
- Include word recognition in hearing assessment, not pure tones alone.
- Offer hearing rehabilitation on its own merits — communication and quality of life.
- Do not tell patients hearing aids prevent Alzheimer disease on this evidence.
Why it matters
It hints that speech understanding may be a better window on brain ageing than the audiogram.
Don't overread it
A cross-sectional association with small effects; it cannot show that hearing loss causes amyloid build-up.
The statistics, in plain English
The β values are small differences in amyloid uptake ratio; many regions were tested, which raises the chance of some significant results by chance.
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