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Midlife vascular risk factor exposure accelerates structural brain aging and cognitive decline.
S Debette1, S Seshadri, A Beiser
1Department of Neurology, Boston University School of Medicine, Boston, MA, USA.
Neurology
|August 4, 2011
Summary
Midlife vascular risk factors like hypertension, diabetes, smoking, and obesity accelerate brain aging. These factors are linked to increased brain atrophy and cognitive decline in memory and executive function a decade later.
Area of Science:
- Neurology
- Cardiovascular Health
- Gerontology
Background:
- Midlife vascular risk factors are increasingly recognized as potential contributors to long-term brain health.
- Understanding the association between these factors and brain aging markers is crucial for preventative strategies.
Purpose of the Study:
- To investigate the link between midlife vascular risk factor exposure and the progression of magnetic resonance imaging (MRI) markers of brain aging.
- To assess the association of these risk factors with measures of cognitive decline over time.
Main Methods:
- Analysis of 1,352 participants from the Framingham Offspring Cohort Study without dementia.
- Utilized multivariable regression to examine associations between midlife vascular risk factors and longitudinal changes in white matter hyperintensity volume (WMHV), total brain volume (TBV), temporal horn volume, and cognitive tests (logical memory, VR-d, TrB-A) over a decade.
Main Results:
- Midlife hypertension correlated with accelerated WMHV progression and worsened executive function.
- Diabetes and smoking were linked to faster hippocampal atrophy (temporal horn volume increase) and smoking also predicted decreased TBV and increased WMHV.
- Obesity was associated with a higher risk of executive function decline, and increased waist-to-hip ratio with TBV decline.
Conclusions:
- Midlife hypertension, diabetes, smoking, and obesity are associated with accelerated vascular brain injury, global and hippocampal atrophy.
- These vascular risk factors predict cognitive decline in memory and executive function a decade later.
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