Abstract:
OBJECTIVE:To define the magnitude and mechanism of the effect of brain infarcts on the odds of dementia in a prospective study. METHODS:We examined the effects of brain infarcts and Alzheimer's disease (AD) pathology on the risk for dementia in 179 subjects from the Baltimore Longitudinal Study of Aging Autopsy Program. All subjects had longitudinal clinical and cognitive evaluations, and underwent postmortem examination of the brain. RESULTS:Brain infarcts were common in our cohort, and both symptomatic and asymptomatic infarcts conferred a significant increase in the odds of dementia. Risk factors for stroke in the absence of an infarct did not increase the odds of dementia, which was quantitatively related to the number but not the size of hemispheral infarcts; deep subcortical infarcts conferred no increased risk for dementia. The contribution of microscopic infarcts to dementia was significant and equivalent to that of macroscopic infarcts. In subjects with intermediate AD pathology scores, a single macroscopic hemispheral infarct was sufficient to cause dementia. A logistic regression model of the effect of infarcts and AD pathology on dementia indicated that AD pathology alone accounts for 50% of the dementia seen in this cohort, and that hemispheral infarcts alone or in conjunction with AD pathology account for 35%. INTERPRETATION:Cerebrovascular disease is a significant and potentially preventable cause of dementia in the Baltimore Longitudinal Study of Aging. Burden and location of infarcts are significantly associated with cognitive decline.
journal_name
Ann Neuroljournal_title
Annals of neurologyauthors
Troncoso JC,Zonderman AB,Resnick SM,Crain B,Pletnikova O,O'Brien RJdoi
10.1002/ana.21413subject
Has Abstractpub_date
2008-08-01 00:00:00pages
168-76issue
2eissn
0364-5134issn
1531-8249journal_volume
64pub_type
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doi:
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pub_type: 杂志文章,评审
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