title: An effectiveness trial of a selected dissonance-based eating disorder prevention program for female high school students: Long-term effects.
abstract: OBJECTIVE
  Efficacy trials found that a dissonance-based eating disorder prevention program in which female high school and college students with body image concerns critique the thin ideal reduced eating disorder risk factors, eating disorder symptoms, and future eating disorder onset. The present effectiveness trial tested whether this program produces effects through long-term follow-up when high school clinicians recruit students and deliver the intervention under real-world conditions.
  
  
  METHODS
  Female high school students with body image concerns (N = 306; M age = 15.7 years, SD = 1.1) were randomized to the dissonance intervention or an educational brochure control condition and completed assessments through 3-year follow-up.
  
  
  RESULTS
  Dissonance participants showed significantly greater decreases in body dissatisfaction at 2-year follow-up and eating disorder symptoms at 3-year follow-up than controls; effects on other risk factors, risk for eating disorder onset, and other outcomes (e.g., body mass) were marginal or nonsignificant.
  
  
  CONCLUSIONS
  Although it was encouraging that some key effects persisted over long-term follow-up, effects were on average smaller in this effectiveness trial than previous efficacy trials, which could be due to (a) facilitator selection, training, and supervision; (b) the lower risk status of participants; or (c) the use of a control condition that produces some effects.
authors.affiliation: Oregon Research Institute, Eugene, OR 97403, USA. estice@ori.org
authors.forename: Eric
authors.initials: E
authors.lastname: Stice
authors.forename: Paul
authors.initials: P
authors.lastname: Rohde
authors.forename: Heather
authors.initials: H
authors.lastname: Shaw
authors.forename: Jeff
authors.initials: J
authors.lastname: Gau
mesh_terms: D000293:Adolescent; D001521:Behavior Therapy / Q000379:methods*; D001828:Body Image; D003073:Cognitive Dissonance; D001068:Feeding and Eating Disorders / Q000517:prevention & control*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D012574:Schools; D012649:Self Concept; D013334:Students; D016896:Treatment Outcome