title: Television, reading, and computer time: correlates of school-day leisure-time sedentary behavior and relationship with overweight in children in the U.S.
abstract: BACKGROUND
  The purposes were 1) to determine if different leisure-time sedentary behaviors (LTSB), such as TV/video/video game viewing/playing (TV), reading for pleasure (reading), and nonschool computer usage, were associated with childhood overweight status, and 2) to assess the social-ecological correlates of LTSB.
  
  
  METHODS
  The analytic sample was 33,117 (16,952 boys and 16,165 girls) participants from the 2003 National Survey of Children's Health. The cut-point for excessive TV and nonschool computer usage was ≥ 2 hr/day. High quantities of daily reading for pleasure were classified as ≥ 31 min/day. Weighted descriptive characteristics were calculated on the sample (means ± SE or frequency). Logistic regression models were used to determine if the LTSB were associated with overweight status and to examine social-ecological correlates.
  
  
  RESULTS
  Over 35% of the sample was overweight. Odds of being overweight were higher in the 2 to 3 hr/day (OR: 1.48, 95% CI: 1.24, 1.76) and ≥ 4 hr/day (OR: 1.52, 95% CI: 1.22, 1.91) daily TV groups compared with none. Reading and nonschool computer usage was not associated with being overweight.
  
  
  CONCLUSIONS
  TV was associated with overweight classification; however, nonschool computer usage and reading were not. Several individual, family, and community correlates were associated with high volumes of daily TV viewing.
authors.affiliation: Dept of Nutritional Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
authors.forename: Susan B
authors.initials: SB
authors.lastname: Sisson
authors.forename: Stephanie T
authors.initials: ST
authors.lastname: Broyles
authors.forename: Birgitta L
authors.initials: BL
authors.lastname: Baker
authors.forename: Peter T
authors.initials: PT
authors.lastname: Katzmarzyk
mesh_terms: D050154:Adiposity; D002648:Child; D002669:Child Welfare; D003201:Computers; D003430:Cross-Sectional Studies; D005260:Female; D015438:Health Behavior; D006801:Humans; D007899:Leisure Activities; D008297:Male; D050177:Overweight / Q000453:epidemiology* / Q000209:etiology / Q000473:pathology; D010101:Oxygen Consumption; D010809:Physical Fitness / Q000502:physiology*; D011932:Reading; D012044:Regression Analysis; D012307:Risk Factors; D057185:Sedentary Behavior; D012737:Sex Factors; D012923:Social Class; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D013690:Television; D013997:Time Factors