Pragmatic Evaluation of Older Adults’ Physical Activity in Scale-Up Studies: Is the Single-Item Measure a Reasonable Option?
in Journal of Aging and Physical ActivityBy purchasing this content you agree and accept the terms and conditions
Convergent validity and responsiveness to change of the single-item physical activity measure were assessed in adults aged 60 years and older, at baseline (n = 205) and 6 months (n = 177) of a health promotion program, Choose to Move. Spearman correlations were used to examine associations between physical activity as measured by the single-item measure and the Community Health Activities Model Program for Seniors (CHAMPS) questionnaire at baseline and for 6-month change in all participants and for sex and age (60–74 years, and ≥75 years) subgroups. Effect size assessed responsiveness to change in physical activity for both tools. Baseline physical activity by the single-item measure correlated moderately with physical activity by the CHAMPS questionnaire in all participants and subgroups. Correlations were weaker for change in physical activity. Effect size for physical activity change was larger for the single-item measure than for the CHAMPS questionnaire. The single-item measure is a valid, pragmatic tool for use in intervention and scale-up studies with older adults.
Macdonald, Nettlefold, Sims-Gould, and McKay are with the Active Aging Research Team, University of British Columbia, Vancouver, British Columbia, Canada. Macdonald, Sims-Gould, and McKay are also with the Department of Family Practice, The University of British Columbia, Vancouver, British Columbia, Canada. Bauman is with the Sydney School of Public Health, The University of Sydney, Camperdown, New South Wales, Australia.
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