The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry · 2017
Baseline Mobility is Not Associated with Decline in Cognitive Function in Healthy Community-Dwelling Older Adults: Findings From The Irish Longitudinal Study on Ageing (TILDA).
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Donoghue Orna, Feeney Joanne, O'Leary Neil, Kenny Rose Anne
Аннотация
OBJECTIVES: Few studies examine the relationship between Timed Up-and-Go (TUG), a commonly used clinical test, and cognitive decline. This study examines whether TUG, usual gait speed (UGS), and dual-task gait speed (DTGS) predict decline in global cognition, executive function, processing speed, memory, and attention with follow-up of up to 5.9 years.
DESIGN: Longitudinal study.
SETTING: The Irish Longitudinal Study on Ageing (TILDA), a nationally representative cohort study.
PARTICIPANTS: Community-dwelling adults aged ≥65 years, with Mini-Mental State Examination (MMSE) score ≥18 and no known history of memory impairment, dementia, Alzheimer's disease or Parkinson's disease were included (N = 2,250).
MEASUREMENTS: Participants completed mobility tasks during the baseline health assessment and cognitive tasks during interviews conducted at 2 year intervals (waves 1, 2, and 3) and health assessments (waves 1 and 3). Linear and Poisson mixed effects regression models were used to examine longitudinal associations between mobility and each cognitive test, adjusting for sociodemographics and physical and mental health.
RESULTS: There was little evidence of an association between TUG, UGS, or DTGS with decline in cognitive function after adjusting for confounders.
CONCLUSIONS: These mobility tasks are not sensitive predictors of cognitive decline in this high-functioning, community-dwelling sample; nonetheless, limited decline in cognitive function was observed during follow-up. Further work with longer follow-up and/or analysis of more specific and comprehensive measures associated with gait is required.
DESIGN: Longitudinal study.
SETTING: The Irish Longitudinal Study on Ageing (TILDA), a nationally representative cohort study.
PARTICIPANTS: Community-dwelling adults aged ≥65 years, with Mini-Mental State Examination (MMSE) score ≥18 and no known history of memory impairment, dementia, Alzheimer's disease or Parkinson's disease were included (N = 2,250).
MEASUREMENTS: Participants completed mobility tasks during the baseline health assessment and cognitive tasks during interviews conducted at 2 year intervals (waves 1, 2, and 3) and health assessments (waves 1 and 3). Linear and Poisson mixed effects regression models were used to examine longitudinal associations between mobility and each cognitive test, adjusting for sociodemographics and physical and mental health.
RESULTS: There was little evidence of an association between TUG, UGS, or DTGS with decline in cognitive function after adjusting for confounders.
CONCLUSIONS: These mobility tasks are not sensitive predictors of cognitive decline in this high-functioning, community-dwelling sample; nonetheless, limited decline in cognitive function was observed during follow-up. Further work with longer follow-up and/or analysis of more specific and comprehensive measures associated with gait is required.