title: Weight-related teasing from adolescence to young adulthood: longitudinal and secular trends between 1999 and 2010.
abstract: OBJECTIVE
  To examine longitudinal trends from 1999-2010 in weight-related teasing as adolescents transition to young adulthood and to examine secular trends in teasing among early and middle adolescents over the same time period.
  
  
  METHODS
  To examine longitudinal changes we used data from 2,287 participants in Project EAT-III, an ongoing cohort that followed two age cohorts of adolescents from 1999 to 2010. Over the study period the younger cohort transitioned from early adolescence to early young adulthood and the older cohort transitioned from middle adolescence to middle young adulthood. To examine how levels of teasing among early and middle adolescents changed from 1999-2010 (secular trends), we compared baseline data from EAT-I to cross-sectional data from a new cohort of early and middle adolescents that was established in 2010.
  
  
  RESULTS
  In 1999, 29% of early adolescent and 23% of middle adolescent females reported being teased. Approximately 18% of males in both age groups reported being teased in 1999. Longitudinal trends suggest that weight-related teasing remained stable among all subgroups as they transitioned to young adulthood, except among early adolescent males where teasing increased to 27% in early young adulthood. Analyses of age-matched secular trends show that teasing decreased by 10.4% among early adolescent females and by 7.6% among middle adolescent males from 1999-2010.
  
  
  CONCLUSIONS
  Results suggest that interventions that focus on reducing weight-based discrimination are needed throughout adolescence and young adulthood. The secular decrease in weight-related teasing is promising, but the high prevalence of teasing remains a public health concern.
authors.affiliation: Department of Family Relations and Applied Nutrition, University of Guelph, Guelph, Ontario, Canada.
authors.forename: Jess
authors.initials: J
authors.lastname: Haines
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Hannan
authors.forename: Patricia
authors.initials: P
authors.lastname: van den Berg
authors.forename: Marla E
authors.initials: ME
authors.lastname: Eisenberg
authors.forename: Dianne
authors.initials: D
authors.lastname: Neumark-Sztainer
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001835:Body Weight; D002648:Child; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D009765:Obesity; D011287:Prejudice / Q000639:trends*; D012737:Sex Factors; D012919:Social Behavior; D055815:Young Adult