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Role of gait speed and grip strength in predicting 10-year cognitive decline among community-dwelling older people
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Role of gait speed and grip strength in predicting 10-year cognitive decline among community-dwelling older people
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Role of gait speed and grip strength in predicting 10-year cognitive decline among community-dwelling older people
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Journal Article
Role of gait speed and grip strength in predicting 10-year cognitive decline among community-dwelling older people
2019
Overview
Background
The gait speed and handgrip strength represented the core determinants of physical frailty and sarcopenia, which were reported to be associated with cognitive impairment and decline. Different physical measures might differentially affect cognitive changes, such as higher-level cognitive change and global cognitive decline. This study examined the differential associations of gait speed and handgrip strength with 10-year cognitive changes among community-dwelling older people.
Methods
Participants aged 60 years and over living in the community were invited for study. Gait speed and handgrip strength were classified into 5 groups based on quintiles at baseline. Cognitive functions were assessed using the Mini-Mental State Examination (MMSE) and Digit Symbol Substitution Test (DSST) every 2 years from baseline for a period of 10 years. Linear mixed effects models were used to determine the role of gait speed and handgrip strength in the prediction of 10-year cognitive changes by adjusting covariates, including age, gender, education, depressive symptoms, marital status, smoking status, instrumental activities of daily life (IADL), Charlson Comorbidity Index (CCI), and body mass index (BMI) at baseline.
Results
A total of 1096 participants were enrolled in the study. The mean age was 69.4 ± 5.8 years and 50.9% were male. The slowest gait speed group showed a significantly greater decline in the DSST scores over 10 years than the highest group (estimate = 0.28 and
P
= 0.003), but not in the MMSE scores (estimate = 0.05 and
P
= 0.078). The lowest handgrip strength group showed a significantly greater decline in the MMSE scores than the highest group (estimate = 0.06 and
P
= 0.039) and in the DSST scores than the highest two quintiles (estimate = 0.20 and
P
= 0.033 for the fourth quintile; estimate = 0.20 and
P
= 0.040 for the highest quintile) over 10-year follow-up.
Conclusions
A slow gait speed could predict 10-year cognitive decline using DSST, and a low handgrip strength could predict 10-year cognitive decline using MMSE in addition to DSST. Thus both physical measures are lined to cognitive decline but there may be different mechanisms between brain and physical functions.
Publisher
BioMed Central,BioMed Central Ltd,BMC
Subject
Activities of Daily Living - psychology
/ Adult
/ Aged
/ Aging
/ Cognitive Dysfunction - diagnosis
/ Cognitive Dysfunction - physiopathology
/ Cognitive Dysfunction - psychology
/ Dementia
/ DSST
/ Elderly
/ Female
/ Humans
/ Independent Living - psychology
/ Male
/ Marriage
/ Medicine
/ MMSE
/ physical health and activity
/ Sarcopenia - physiopathology
/ Walking
