title: Effect of television viewing on pediatric obesity.
abstract: OBJECTIVE
  To test the effect of television viewing on pediatric obesity in urban China.
  
  
  METHODS
  Stratified multistage cluster random sampling method was used for subjects selection. Nine thousand three hundred and fifty-six children, as well as their parents, were investigated. Questionnaire survey was used for data collection. Children's weights and heights were measured in the clinic of the investigated kindergartens or schools by trained investigators following the standardized procedure.
  
  
  RESULTS
  The percentages of children and adolescents who watched television less than 1 h, 1-2 h, 2-3 h and more than 3 h daily were 32.5%, 46.0%, 15.4% and 6.1%, respectively, while the prevalence of obesity was 10.9%, 11.8%, 13.2% and 15.1%, respectively. Each hourly increment of television viewing was associated with 1%-2% increase in the prevalence of obesity.
  
  
  CONCLUSIONS
  Time spent watching television is directly related to an increase risk of obesity, television viewing time is an independent factor for pediatric obesity.
authors.affiliation: Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing 100050, China. mgs@public.bta.net.cn
authors.forename: Guan-Sheng
authors.initials: GS
authors.lastname: Ma
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Li
authors.forename: Xiao-Qi
authors.initials: XQ
authors.lastname: Hu
authors.forename: Wen-Jun
authors.initials: WJ
authors.lastname: Ma
authors.forename: Jin
authors.initials: J
authors.lastname: Wu
mesh_terms: D000293:Adolescent; D002648:Child; D002669:Child Welfare; D002675:Child, Preschool; D002681:China; D016021:Epidemiologic Studies; D015444:Exercise; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D009765:Obesity / Q000453:epidemiology / Q000209:etiology*; D012307:Risk Factors; D013690:Television; D014505:Urban Population