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Reliability and Validity of a Domain-Specific Last 7-d Sedentary Time Questionnaire

WIJNDAELE, KATRIEN1; DE BOURDEAUDHUIJ, ILSE2; GODINO, JOB G.1; LYNCH, BRIGID M.3,4; GRIFFIN, SIMON J.1; WESTGATE, KATE1; BRAGE, SØREN1

Erratum

In the article “Reliability and validity of a domain-specific last 7-d sedentary time questionnaire” (1), which published in the June 2014 issue of Medicine & Science in Sports & Exercise, an incorrect Open Access license type was associated with the article. The correct license type is given below. This error has been fixed online.

This is an open access article distributed under the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Medicine & Science in Sports & Exercise. 46(9):1869, September 2014.

Medicine & Science in Sports & Exercise: June 2014 - Volume 46 - Issue 6 - p 1248–1260
doi: 10.1249/MSS.0000000000000214
SPECIAL COMMUNICATIONS: Methodological Advances

Purpose The objective of this study is to examine test–retest reliability, criterion validity, and absolute agreement of a self-report, last 7-d sedentary behavior questionnaire (SIT-Q-7d), which assesses total daily sedentary time as an aggregate of sitting/lying down in five domains (meals, transportation, occupation, nonoccupational screen time, and other sedentary time). Dutch (DQ) and English (EQ) versions of the questionnaire were examined.

Methods Fifty-one Flemish adults (ages 39.4 ± 11.1 yr) wore a thigh accelerometer (activPAL3™) and simultaneously kept a domain log for 7 d. The DQ was subsequently completed twice (median test–retest interval: 3.3 wk). Thigh-acceleration sedentary time was log annotated to create comparable domain-specific and total sedentary time variables. Four hundred two English adults (ages 49.6 ± 7.3 yr) wore a combined accelerometer and HR monitor (Actiheart®) for 6 d to objectively measure total sedentary time. The EQ was subsequently completed twice (median test–retest interval: 3.4 wk). In both samples, the questionnaire reference frame overlapped with the criterion measure administration period. All participants had five or more valid days of criterion data, including one or more weekend day.

Results Test–retest reliability (intraclass correlation coefficient (95% CI)) was fair to good for total sedentary time (DQ: 0.68 (0.50–0.81); EQ: 0.53 (0.44–0.62)) and poor to excellent for domain-specific sedentary time (DQ: from 0.36 (0.10–0.57) (meals) to 0.66 (0.46–0.79) (occupation); EQ: from 0.45 (0.35–0.54) (other sedentary time) to 0.76 (0.71–0.81) (meals)). For criterion validity (Spearman rho), significant correlations were found for total sedentary time (DQ: 0.52; EQ: 0.22; all P <0.001). Compared with domain-specific criterion variables (DQ), modest-to-strong correlations were found for domain-specific sedentary time (from 0.21 (meals) to 0.76 (P < 0.001) (screen time)). The questionnaire generally overestimated sedentary time compared with criterion measures.

Conclusion The SIT-Q-7d appears to be a useful tool for ranking individuals in large-scale observational studies examining total and domain-specific sitting.

Supplemental digital content is available in the text.

1MRC Epidemiology Unit, University of Cambridge, Cambridge, England, UNITED KINGDOM; 2Department of Movement and Sport Sciences, Ghent University, Ghent, BELGIUM; 3Physical Activity Laboratory, Baker IDI Heart and Diabetes Institute, Melbourne, AUSTRALIA; 4Melbourne School of Population and Global Health, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, AUSTRALIA

Address for correspondence: Katrien Wijndaele, Ph.D., MRC Epidemiology Unit, Institute of Metabolic Science, University of Cambridge, Box 285, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 0QQ, England, United Kingdom; E-mail: katrien.wijndaele@mrc-epid.cam.ac.uk.

Submitted for publication September 2013.

Accepted for publication November 2013.

Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal’s Web site (www.acsm-msse.org).

Trial registration number: Current Controlled Trials ISRCTN09650496

This is an open access article distributed under the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.

© 2014 American College of Sports Medicine