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Title: Validity of two self-report measures of sitting time
Authors: Clemes, Stacy A.
David, Beverley M.
Zhao, Yi
Han, Xu
Brown, Wendy J.
Keywords: Sitting
Physical activity
Sedentary behaviour
Issue Date: 2012
Publisher: © Human Kinetics
Citation: CLEMES, S.A. ... (et al.), 2012. Validity of two self-report measures of sitting time. Journal of Physical Activity and Health, 9 (4), pp. 533-539.
Abstract: BACKGROUND: In light of evidence linking sedentary behaviors to health outcomes, there have been calls for the measurement of sedentary behavior in surveillance studies. METHOD: This study examined the convergent validity of 2 self-report measures of sitting time and accelerometer-determined sedentary time (minutes/day of Methods: 44 adults wore an ActiGraph accelerometer for 7 days, during which they also recorded daily sitting time in a diary, in response to a single-item question. After 7 days, participants completed a new domain-specific questionnaire to assess usual weekday and weekend-day sitting time. Total sitting times recorded from the self-report measures were compared with accelerometer-determined sedentary time. RESULTS: Total sitting time calculated from the domain-specific questionnaire did not differ significantly from accelerometer-determined sedentary time on weekdays (mean difference [±SE] = –14 ± 28 mins/day) and weekend days (–4 ± 45 mins/day, both P > .05). Sitting time was significantly underestimated using the single-item specific-day question on weekdays (–173 ± 18 mins/day) and weekend days (–219 ± 23 mins/day, both P < .001). CONCLUSIONS: When assessed via self-report, the estimation of total sitting time is improved by summing sitting times reported across different domains. The continued improvement of self-report measures of sitting time will be important if we are to further our understanding of the links between sedentary behavior and health.
Description: As accepted for publication.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/15582
Publisher Link: http://journals.humankinetics.com/jpah-back-issues/jpah-volume-9-issue-4-may/validity-of-two-self-report-measures-of-sitting-time
ISSN: 1543-3080
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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