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Two factors — blood pressure and education level — are shaping how quickly amyloid buildup leads to cognitive decline in people over 90. A new study found that high pulse pressure combined with lower education significantly worsened the brain's slide toward dementia. The findings suggest that even in the oldest adults, vascular health and cognitive reserve still matter for brain outcomes.
Reaching your 90s doesn't mean you're off the hook when it comes to modifiable risk factors for dementia. A new study published in Alzheimer's & Dementia found that high pulse pressure — a marker of arterial stiffness — and lower educational attainment both amplify the cognitive damage caused by amyloid buildup in the brain, even in adults aged 90 and older.
Researchers analyzed data from 296 participants in The 90+ Study, using PET scans to measure cerebral amyloid burden and the Clinical Dementia Rating (CDR) scale to track cognition over time. While higher amyloid levels were linked to worsening CDR scores overall, the combination of high pulse pressure and low education created the steepest cognitive decline trajectory.
By the Numbers:
Why it matters: These findings reinforce that vascular health and education remain meaningful predictors of brain aging well into the oldest age groups — pointing to potential intervention targets even for nonagenarians.
