AI Insight
A study examining individuals over 90 years old found that dementia risk continues to be significantly influenced by sex, race, and genetic factors, with women and Black participants showing substantially elevated risk levels. Notably, researchers identified some participants who maintained cognitive health despite possessing major risk factors, suggesting certain protective mechanisms may enable the brain to resist dementia even at advanced ages.
Why it matters
Understanding why some nonagenarians remain cognitively intact despite having risk factors could reveal new therapeutic targets for dementia prevention and treatment. The findings highlight persistent health disparities in dementia risk that require targeted interventions for vulnerable populations.
Understand the Science
A study of people over 90 found that dementia risk remains strongly shaped by sex, race and genetics, with women and black participants facing notably higher risks. Intriguingly, some people stayed cognitively healthy despite carrying major risk factors, potentially offering clues to how the brain can resist dementia deep into old age.
Source: Reaching 90 without dementia doesn’t mean you’re in the clear