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Validity of a single question to assess habitual physical activity of community-dwelling older people.

https://arctichealth.org/en/permalink/ahliterature290450
Source
Scand J Med Sci Sports. 2017 Nov; 27(11):1423-1430
Publication Type
Journal Article
Validation Studies
Date
Nov-2017
Author
E Portegijs
S Sipilä
A Viljanen
M Rantakokko
T Rantanen
Author Affiliation
Gerontology Research Center and Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland.
Source
Scand J Med Sci Sports. 2017 Nov; 27(11):1423-1430
Date
Nov-2017
Language
English
Publication Type
Journal Article
Validation Studies
Keywords
Aged
Aged, 80 and over
Cross-Sectional Studies
Exercise
Female
Finland
Humans
Independent living
Longitudinal Studies
Male
Mobility Limitation
Self Report
Surveys and Questionnaires
Walking
Abstract
The aim is to determine concurrent validity of a single self-report habitual physical activity (PA) question against accelerometer-based PA and mobility variables, and corresponding changes in self-reported PA and mobility. Cross-sectional and longitudinal data of the "Life-space mobility in old age" (LISPE) cohort and its substudy on PA were utilized. At baseline, 848 community-dwelling, 75- to 90-year-old people living independently in central Finland participated in home-based interviews. One and 2 years later, 816 and 761 of them were reassessed by phone, respectively. Tri-axial accelerometer data over 7 days were collected following the baseline assessments in a subsample of 174. Self-reported habitual PA was assessed based on intensity and duration using a single question with seven response options (range: mostly resting to competitive sports). Mobility variables were as follows: life-space mobility, walking difficulty over 500 m, and short physical performance battery. Statistically significant correlations were found between self-reported habitual PA and mobility (Spearman correlation coefficient Rs = 0.40-0.61) and accelerometer-based PA variables [step counts (Rs = 0.49), time in moderate (Rs = 0.49) and low intensity (Rs = 0.40) PA, and time in sedentary behavior (Rs = -0.28)]. A decline in self-reported habitual PA over time was associated with 5-10p decline in life-space mobility (PA improvement with 0-3p increase) and with developing a higher degree of walking difficulty (in 35-44% of participants). In conclusion, based on these results, the self-report question to assess habitual PA is valid and responsive to change and thus useful for epidemiological research in community-dwelling older people, also in follow-up studies.
PubMed ID
27747944 View in PubMed
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