Relationship of television time with accelerometer-derived sedentary time: NHANES

Clark, Bronwyn K., Healy, Genevieve N., Winkler, Elisabeth A. H., Gardiner, Paul A., Sugiyama, Takemi, Dunstan, David W., Matthews, Charles E. and Owen, Neville (2011) Relationship of television time with accelerometer-derived sedentary time: NHANES. Medicine and Science in Sports and Exercise, 43 5: 822-828. doi:10.1249/MSS.0b013e3182019510

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Author Clark, Bronwyn K.
Healy, Genevieve N.
Winkler, Elisabeth A. H.
Gardiner, Paul A.
Sugiyama, Takemi
Dunstan, David W.
Matthews, Charles E.
Owen, Neville
Title Relationship of television time with accelerometer-derived sedentary time: NHANES
Journal name Medicine and Science in Sports and Exercise   Check publisher's open access policy
ISSN 0195-9131
Publication date 2011-05
Year available 2010
Sub-type Article (original research)
DOI 10.1249/MSS.0b013e3182019510
Open Access Status File (Author Post-print)
Volume 43
Issue 5
Start page 822
End page 828
Total pages 7
Place of publication Philadelphia, PA, United States
Publisher Lippincott Williams & Wilkins
Collection year 2011
Language eng
Formatted abstract
Purpose: To examine the relationship of self-reported television (TV) viewing time with accelerometer-derived total sedentary time and to determine whether it differs by subgroup.
Methods: Using data for adults (>=20 yr) from the 2003-2004 and 2005-2006 nationally representative US National Health and Nutrition Examination Surveys (NHANES; n = 5738), linear regression models examined the associations of categories of self-reported TV viewing time (<1, 1, 2, 3, 4, and >5 h·d-1) with accelerometer-derived sedentary time (<100 counts per minute; h·d-1). Spearman [rho] assessed the correlation between participants' rankings on the two measures. Analyses were stratified by gender, age, race/ethnicity, and, in the 2003-2004 NHANES cycle, by work status among working-aged adults (20-65 yr, n = 2069).
Results: TV viewing time was significantly associated with sedentary time, with positive associations for all gender, age, race/ethnicity groups, and for those not working or working part-time, but not for those in full-time work. However, correlations between rankings of the measures were only "fair" overall ([rho] = 0.22) and were similar for all gender and racial/ethnic groups and for those of mid- and older age but not for those of younger age (20-39 yr, [rho] = 0.05). In the working-aged subgroup, there was also a fair correlation between the measures for those not working ([rho] = 0.22) but no significant correlation for those in part-time ([rho] = 0.14) or full-time work ([rho] = 0.03).
Conclusions: Associations of TV viewing time with accelerometer-derived total sedentary time were statistically significant, but correlations were of only fair magnitude, and the strength of the relationship was not consistent across all population subgroups. These findings suggest that TV viewing time has an influence on overall sedentary time at a population level; however, measurement of sedentary time in other domains is also important.
© 2011The American College of Sports Medicine
Keyword Sedentary behavior
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 26 October 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Public Health Publications
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Created: Fri, 04 Mar 2011, 14:39:01 EST by Geraldine Fitzgerald on behalf of School of Public Health