Gene variant’s dementia link differed by sex and risk factors
An observational cohort of 181,006 white adults aged 55 or older found that the variant’s dementia link varied most strongly with education.
Edited by Boris Djordjevic · AgingResearch.News
An observational cohort study examined 181,006 white UK Biobank participants aged 55 or older. Researchers studied APOE ε4, a variant of a gene that provides instructions for a protein involved in transporting fats. They examined how its association with dementia varied with lifestyle, body fat, socioeconomic circumstances and health conditions occurring before dementia.
The variant’s association with dementia differed by risk factors and sex. Low education showed the strongest interaction with the variant: its association with dementia differed most strongly according to education. This applied to both dementia overall and Alzheimer’s disease, a major subtype. Body fat was associated with higher dementia risk among people without the variant, but lower risk among those carrying it.
Why it matters
Dementia risk in later life involves both inherited susceptibility and potentially modifiable factors. Understanding how they combine may help clarify differences in risk.
Caveats
This observational study could not establish that changing these factors would change dementia risk. Its findings came from white UK Biobank participants aged 55 or older and may not apply to other populations.
The paper
University of Glasgow
GeroScience, Jul 31, 2026, Open access
Comments
Be the first to comment.