title: Testing mediators hypothesized to account for the effects of a dissonance-based eating disorder prevention program over longer term follow-up.
abstract: OBJECTIVE
  Test the hypothesis that reductions in thin-ideal internalization and body dissatisfaction mediate the effects of a dissonance-based eating disorder prevention program on reductions in eating disorder symptoms over 1-year follow-up.
  
  
  METHODS
  Data were drawn from a randomized effectiveness trial in which 306 female high school students (mean age = 15.7 years, SD = 1.1) with body image concerns were randomized to the 4-session dissonance-based prevention program or an educational brochure control condition, wherein school counselors and nurses were responsible for participant recruitment and intervention delivery.
  
  
  RESULTS
  Dissonance-intervention participants showed greater reductions in thin-ideal internalization, body dissatisfaction, and eating disorder symptoms; change in thin-ideal internalization predicted change in body dissatisfaction and symptoms; change in body dissatisfaction predicted change in symptoms; and all indirect effects were significant. Change in thin-ideal internalization fully mediated the effects of intervention condition on change in body dissatisfaction and partially mediated the effects on symptoms; change in body dissatisfaction partially mediated the effect of intervention condition on change in symptoms.
  
  
  CONCLUSIONS
  Findings provided support for the intervention theory of this eating disorder prevention program over longer term follow-up, extending the evidence base for this effective intervention.
authors.affiliation: Oregon Research Institute, 1715 Franklin Boulevard, Eugene, OR 97403, USA. estice@ori.org
authors.forename: Eric
authors.initials: E
authors.lastname: Stice
authors.forename: C Nathan
authors.initials: CN
authors.lastname: Marti
authors.forename: Paul
authors.initials: P
authors.lastname: Rohde
authors.forename: Heather
authors.initials: H
authors.lastname: Shaw
mesh_terms: D000293:Adolescent; D001828:Body Image; D003073:Cognitive Dissonance; D005247:Feeding Behavior / Q000523:psychology; D001068:Feeding and Eating Disorders / Q000517:prevention & control* / Q000523:psychology; D005260:Female; D006801:Humans; D010549:Personal Satisfaction; D013334:Students; D016896:Treatment Outcome