Measuring older adults' sedentary time: Reliability, validity, and responsiveness

Gardiner, Paul A., Clark, Bronwyn K., Healy, Genevieve N., Eakin, Elizabeth G., Winkler, Elisabeth A. H. and Owen, Neville (2011) Measuring older adults' sedentary time: Reliability, validity, and responsiveness. Medicine and Science in Sports and Exercise, 43 11: 2127-2133. doi:10.1249/MSS.0b013e31821b94f7

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ261828_postprint.pdf Full text (open access) application/pdf 556.49KB 0

Author Gardiner, Paul A.
Clark, Bronwyn K.
Healy, Genevieve N.
Eakin, Elizabeth G.
Winkler, Elisabeth A. H.
Owen, Neville
Title Measuring older adults' sedentary time: Reliability, validity, and responsiveness
Journal name Medicine and Science in Sports and Exercise   Check publisher's open access policy
ISSN 0195-9131
Publication date 2011-11
Sub-type Article (original research)
DOI 10.1249/MSS.0b013e31821b94f7
Open Access Status File (Author Post-print)
Volume 43
Issue 11
Start page 2127
End page 2133
Total pages 7
Place of publication Philadelphia, PA, United States
Publisher Lippincott Williams & Wilkins
Collection year 2012
Language eng
Formatted abstract
Purpose: With evidence that prolonged sitting has deleterious health consequences, decreasing sedentary time is a potentially important preventive health target. High-quality measures, particularly for use with older adults, who are the most sedentary population group, are needed to evaluate the effect of sedentary behavior interventions. We examined the reliability, validity, and responsiveness to change of a self-report sedentary behavior questionnaire that assessed time spent in behaviors common among older adults: watching television, computer use, reading, socializing, transport and hobbies, and a summary measure (total sedentary time).
Methods: In the context of a sedentary behavior intervention, nonworking older adults (n = 48, age = 73 ± 8 yr (mean ± SD)) completed the questionnaire on three occasions during a 2-wk period (7 d between administrations) and wore an accelerometer (ActiGraph model GT1M) for two periods of 6 d. Test-retest reliability (for the individual items and the summary measure) and validity (self-reported total sedentary time compared with accelerometer-derived sedentary time) were assessed during the 1-wk preintervention period, using Spearman (ρ) correlations and 95% confidence intervals (CI). Responsiveness to change after the intervention was assessed using the responsiveness statistic (RS).
Results: Test-retest reliability was excellent for television viewing time (ρ (95% CI) = 0.78 (0.63-0.89)), computer use (ρ (95% CI) = 0.90 (0.83-0.94)), and reading (ρ (95% CI) = 0.77 (0.62-0.86)); acceptable for hobbies (ρ (95% CI) = 0.61 (0.39-0.76)); and poor for socializing and transport (ρ < 0.45). Total sedentary time had acceptable test-retest reliability (ρ (95% CI) = 0.52 (0.27-0.70)) and validity (ρ (95% CI) = 0.30 (0.02-0.54)). Self-report total sedentary time was similarly responsive to change (RS = 0.47) as accelerometer-derived sedentary time (RS = 0.39).
Conclusions: The summary measure of total sedentary time has good repeatability and modest validity and is sufficiently responsive to change suggesting that it is suitable for use in interventions with older adults.
Keyword Sitting
Responsiveness to change
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Public Health Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 40 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 47 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 20 Nov 2011, 04:50:46 EST by System User on behalf of School of Public Health