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Potential Value of Impaired Cognition in Stroke Prediction: A U.K. Population-Based Study

Lookup NU author(s): Dr Blossom Stephan, Professor Fiona Matthews, Professor Carol Brayne

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

© 2017 American Geriatrics Society and Wiley Periodicals, Inc. Objectives: To determine whether the association between impaired cognition and greater risk of incident stroke is also observed when cognitive impairment is defined using different criteria for mild cognitive impairment (MCI). Design: Prospective cohort study with 10 years of follow-up. Setting: Large multicentre study in the United Kingdom. Participants: Individuals (aged 64-105) from the Medical Research Council Cognitive Function and Ageing Study (N = 13,004). From this, a subsample of 2,640 individuals was selected based on age, center, and cognitive ability to undergo a detailed cognitive assessment. Measurements: Information on sociodemographic characteristics, health, cognition, and functional ability was collected in an interview. The Geriatric Mental State Automated Geriatric Examination for Computer Assisted Taxonomy and the Cambridge Cognitive Examination were used to determine cognitive status. Stroke incidence was derived from self-report, informant report, and death certificates. Participants were divided into no, mild, moderate, and severe cognitive impairment according to their baseline Mini-Mental State Examination (MMSE) score. MCI criteria were used to classify persons into four groups: no cognitive impairment, MCI, severe impairment (i.e. other cognitive impairment no dementia: OCIND) and dementia. Results: Over 10 years, 703 incident strokes occurred. Lower MMSE score at baseline was associated with greater risk of incident stroke. When cognitive status was determined according to MCI criteria, those with severe impairment (odds ratio (OR) = 1.5, 95% confidence interval (CI) = 1.0-2.2) and dementia (OR = 2.6, 95% CI = 1.6-3.4) had a significantly greater risk of stroke than those with no cognitive impairment. Conclusion: Criteria for MCI, defined using MMSE scores or clinical criteria, can capture individuals at greater stroke risk. The results highlight the need to focus on stroke risk in individuals even with MCI.


Publication metadata

Author(s): Stephan BCM, Richardson K, Savva GM, Matthews FE, Brayne C, Hachinski V

Publication type: Article

Publication status: Published

Journal: Journal of the American Geriatrics Society

Year: 2017

Volume: 65

Issue: 8

Pages: 1756–1762

Print publication date: 01/08/2017

Online publication date: 03/04/2017

Acceptance date: 02/02/2017

ISSN (print): 0002-8614

ISSN (electronic): 1532-5415

Publisher: Wiley-Blackwell

URL: https://doi.org/10.1111/jgs.14878

DOI: 10.1111/jgs.14878


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