Walking speed, cognitive function and dementia risk in the English Longitudinal Study

Background: Physical and cognitive function decline with age. Slow walking speed has been associated with negative health outcomes and dementia is often preceded by cognitive decline. This study investigated walking speed, cognitive function and the interaction between changes in these measures in r...

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Main Authors: Hackett, Ruth A., Davies, Hilary, Cadar, Dorina, Orrell, Martin, Steptoe, Andrew
Format: Article
Language:English
Published: Wiley 2018
Subjects:
Online Access:https://eprints.nottingham.ac.uk/49458/
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author Hackett, Ruth A.
Davies, Hilary
Cadar, Dorina
Orrell, Martin
Steptoe, Andrew
author_facet Hackett, Ruth A.
Davies, Hilary
Cadar, Dorina
Orrell, Martin
Steptoe, Andrew
author_sort Hackett, Ruth A.
building Nottingham Research Data Repository
collection Online Access
description Background: Physical and cognitive function decline with age. Slow walking speed has been associated with negative health outcomes and dementia is often preceded by cognitive decline. This study investigated walking speed, cognitive function and the interaction between changes in these measures in relation to dementia risk. Method: Walking speed and cognition were assessed in 3,932 individuals aged ≥60 years at wave 1 (2002-03) and 2 (2004-05) of the English Longitudinal Study of Ageing. New dementia cases were assessed from wave 3 (2006-07) to wave 7 (2014-15). The associations were modelled using Cox proportional hazards regression. Results: Participants with faster baseline walking speeds (HR 0.36; 95% CI 0.22 - 0.60) had a decreased risk of dementia. Those who had a greater decline in walking speed (waves 1 - 2 (HR 1.23; 95% CI 1.03 - 1.47) had an increased dementia risk. Participants with greater baseline cognition (HR 0.42; 95% CI 0.34 - 0.54) had a reduced dementia risk. Those who had a greater decline in cognition (waves 1-2) had a greater risk of dementia (HR 1.78; 95% CI 36 1.53 - 2.06). Change in walking speed and change in cognition did not interact significantly in relation to dementia risk (HR 1.01; 95% CI 0.88 – 1.17). Conclusions: In this community-dwelling sample of English adults those with slower walking speeds and a greater decline in speed over time had an increased risk of developing dementia independent of changes in cognition. Further research is required to understand the mechanisms that may drive these associations.
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spelling nottingham-494582018-10-12T10:52:22Z https://eprints.nottingham.ac.uk/49458/ Walking speed, cognitive function and dementia risk in the English Longitudinal Study Hackett, Ruth A. Davies, Hilary Cadar, Dorina Orrell, Martin Steptoe, Andrew Background: Physical and cognitive function decline with age. Slow walking speed has been associated with negative health outcomes and dementia is often preceded by cognitive decline. This study investigated walking speed, cognitive function and the interaction between changes in these measures in relation to dementia risk. Method: Walking speed and cognition were assessed in 3,932 individuals aged ≥60 years at wave 1 (2002-03) and 2 (2004-05) of the English Longitudinal Study of Ageing. New dementia cases were assessed from wave 3 (2006-07) to wave 7 (2014-15). The associations were modelled using Cox proportional hazards regression. Results: Participants with faster baseline walking speeds (HR 0.36; 95% CI 0.22 - 0.60) had a decreased risk of dementia. Those who had a greater decline in walking speed (waves 1 - 2 (HR 1.23; 95% CI 1.03 - 1.47) had an increased dementia risk. Participants with greater baseline cognition (HR 0.42; 95% CI 0.34 - 0.54) had a reduced dementia risk. Those who had a greater decline in cognition (waves 1-2) had a greater risk of dementia (HR 1.78; 95% CI 36 1.53 - 2.06). Change in walking speed and change in cognition did not interact significantly in relation to dementia risk (HR 1.01; 95% CI 0.88 – 1.17). Conclusions: In this community-dwelling sample of English adults those with slower walking speeds and a greater decline in speed over time had an increased risk of developing dementia independent of changes in cognition. Further research is required to understand the mechanisms that may drive these associations. Wiley 2018-09-30 Article PeerReviewed application/pdf en cc_by https://eprints.nottingham.ac.uk/49458/43/Hackett_et_al-2018-Journal_of_the_American_Geriatrics_Society.pdf Hackett, Ruth A., Davies, Hilary, Cadar, Dorina, Orrell, Martin and Steptoe, Andrew (2018) Walking speed, cognitive function and dementia risk in the English Longitudinal Study. Journal of the American Geriatrics Society, 66 (9). pp. 1670-1675. ISSN 1532-5415 Gait speed; Cognition; Dementia http://onlinelibrary.wiley.com/doi/10.1111/jgs.15312/abstract doi:10.1111/jgs.15312 doi:10.1111/jgs.15312
spellingShingle Gait speed; Cognition; Dementia
Hackett, Ruth A.
Davies, Hilary
Cadar, Dorina
Orrell, Martin
Steptoe, Andrew
Walking speed, cognitive function and dementia risk in the English Longitudinal Study
title Walking speed, cognitive function and dementia risk in the English Longitudinal Study
title_full Walking speed, cognitive function and dementia risk in the English Longitudinal Study
title_fullStr Walking speed, cognitive function and dementia risk in the English Longitudinal Study
title_full_unstemmed Walking speed, cognitive function and dementia risk in the English Longitudinal Study
title_short Walking speed, cognitive function and dementia risk in the English Longitudinal Study
title_sort walking speed, cognitive function and dementia risk in the english longitudinal study
topic Gait speed; Cognition; Dementia
url https://eprints.nottingham.ac.uk/49458/
https://eprints.nottingham.ac.uk/49458/
https://eprints.nottingham.ac.uk/49458/