title: Patterns of physical activity, sedentary behavior, and diet in U.S. adolescents.
abstract: OBJECTIVE
  To identify patterns in adolescents' obesogenic behaviors and their relations to physical and psychological health.
  
  
  METHODS
  A nationally representative sample of 9,174 U.S. adolescents ages 11 to 16 years was surveyed on physical activity (PA), screen-based sedentary behavior (SB), frequency of consumption of healthy and unhealthy food items, weight status, weight control behavior, depression, physical symptoms, body dissatisfaction, overall health, and life satisfaction. Latent class analysis was used to identify patterns of PA, SB, and diet.
  
  
  RESULTS
  A model with three latent classes best fit the data: Class 1 with high PA and high fruit and vegetable intake and low SB and intake of sweets, soft drinks, chips, and fries; Class 2 with high SB and high intake of sweets, soft drinks, chips, and fries; and Class 3 with low PA, low fruit and vegetable intake, and low intake of sweets, chips, and fries. Membership in the three classes was related to age, gender, race/ethnicity, and socioeconomic status. In addition, members of Class 1 (26.5%) were more likely to be of normal weight status and to fare well on most of the other health indices; of Class 2 (26.4%) were less likely to be trying to lose weight but scored poorly on the mental health indices; and of Class 3 (47.2%) were less likely to be underweight and reported greater body dissatisfaction.
  
  
  CONCLUSIONS
  Three prevalent patterns of adolescent obesogenic behaviors were identified and these patterns related to weight status, depression, and other indicators of physical and psychological health.
authors: Prevention Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD 20892-7510, USA. iannottr@mail.nih.gov
authors: Ronald J
authors: RJ
authors: Iannotti
authors: Jing
authors: J
authors: Wang
mesh_terms: D000293:Adolescent; D001828:Body Image; D001835:Body Weight; D002648:Child; D003863:Depression / Q000453:epidemiology; D004032:Diet; D005260:Female; D006305:Health Status Indicators; D006306:Health Surveys; D006801:Humans; D008297:Male; D009043:Motor Activity; D010549:Personal Satisfaction; D015995:Prevalence; D057185:Sedentary Behavior; D014481:United States / Q000453:epidemiology; D015431:Weight Loss
keywords: Adolescent obesity; Body mass index; Diet; Physical activity; Sedentary behavior; Television
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