Abstract
Introduction: We tested the hypothesis that brain arterial dilatation increases the risk of Alzheimer's dementia (AD). Methods: We studied dementia-free participants in the Washington Heights-Inwood Columbia Aging Project who had a brain MRI and post-MRI dementia adjudication. We measured the axial T2-proton density diameters of the intracranial carotids and basilar diameters and used Cox models to obtain AD hazard ratios and 95% intervals. Results: Of 953 participants (mean age 77 ± 7 y, women 64%, 71% nonwhite)followed on average for 3 ± 3 years, 76 (8%)developed AD. In a model adjusted for demographics, vascular risks, apolipoprotein E (APOE)-ε4, and white matter hyperintensities, larger carotid diameters increased the risk of AD, defined categorically as ≥ 90th percentile (HR 4.34, 1.70–11.11)or continuously (HR 1.44 per SD, 1.07–1.94). Discussion: Understanding the pathophysiology of the association between AD and brain arterial dilatation may reveal new clues to the vascular contributions to AD.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 666-674 |
| Number of pages | 9 |
| Journal | Alzheimer's and Dementia |
| Volume | 15 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2019 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2019 the Alzheimer's Association
Keywords
- Alzheimer's disease
- Brain arterial diameters
- Brain arterial dilatation
- Carotid artery
- Dementia
- Dolichoectasia