Ankle-Brachial Index, Cognitive Impairment and Cerebrovascular Disease in a Chinese Population

Saima Hilal, M Saini, CS Tan, JA Catindig, YH Dong, LB Leon, Wiro Niessen, Henri Vrooman, TY (Tien Yin) Wong, C (Christopher Li Hsian) Chen, N Venketasubramanian, Kamran Ikram

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Abstract

Background: Previous studies have assessed the association between ankle-brachial index (ABI) and cognition, mainly using brief cognitive tests. We investigated whether ABI was associated with cognition independent of neuroimaging markers of cerebrovascular disease. Methods: Chinese subjects (n = 278, aged >= 60 years) were recruited from the ongoing Epidemiology of Dementia in Singapore (EDIS) Study. Ankle and brachial blood pressures were measured, and low ABI was defined as <= 0.9. A neuropsychological battery was utilized to determine cognition. Cognitive impairment no dementia (CIND) and dementia were diagnosed according to standard diagnostic criteria. Magnetic resonance imaging (MRI) was used to obtain semiquantitative and quantitative markers of cerebrovascular disease and atrophy. Results: A low ABI was related to the presence of intracranial stenosis (odds ratio, OR = 1.71; 95% confidence interval, Cl: 1.13-2.59), but not with the presence of infarcts, microbleeds or grey matter, white matter and white matter lesion volumes. Furthermore, a low ABI was associated with poorer overall cognitive function and CIND-moderate/dementia (OR = 2.26; 95% Cl: 1.11-4.59), independent of cardiovascular risk factors, and the MRI markers related to cerebrovascular disease and atrophy. Conclusion: We found an ass ciation between a low ABI and cognitive impairment, independent of any MRI marker of cerebral small vessel disease or large artery atherosclerotic disease. (C) 2014 S. Karger AG, Basel
Original languageUndefined/Unknown
Pages (from-to)131-138
Number of pages8
JournalNeuroepidemiology
Volume42
Issue number2
DOIs
Publication statusPublished - 2014

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