title: Efficacy trial of a selective prevention program targeting both eating disorders and obesity among female college students: 1- and 2-year follow-up effects.
abstract: OBJECTIVE
  Evaluate the effects of a prevention program targeting both eating disorders and obesity at 1- and 2-year follow-ups.
  
  
  METHODS
  Female college students at risk for these outcomes because of body image concerns (N = 398) were randomized to the Healthy Weight 2 group-based 4-hr prevention program, which promotes lasting healthy improvements to dietary intake and physical activity and nutrition science health behavior change principles, or an educational brochure control condition.
  
  
  RESULTS
  Intervention participants showed significantly less body dissatisfaction and eating disorder symptoms and lower eating disorder onset through 2-year follow-up versus controls, but the former 2 effects were small. There were no main effects for body mass index (BMI), depressive symptoms, dieting, caloric intake, physical activity, or obesity onset. Moderator analyses revealed stronger eating disorder symptom effects for youths with initially elevated symptoms and lower pressure to be thin, stronger BMI effects for youths with initially elevated symptoms and BMI scores, and weaker eating disorder symptom effects for youths with initially elevated pressure to be thin.
  
  
  CONCLUSIONS
  The 60% reduction in eating disorder onset over the 2-year follow-up was clinically significant and a novel effect for a prevention program, but the main effects on continuous outcomes were small, suggesting that adding nutrition science principles weakened the intervention efficacy. Effects on both eating disorder symptoms and BMI were greater for those with elevated eating disorder symptoms and BMI at pretest, implying that it might be useful to target these individuals in future trials.
authors.affiliation: Oregon Research Institute.
authors.forename: Eric
authors.initials: E
authors.lastname: Stice
authors.affiliation: Oregon Research Institute.
authors.forename: Paul
authors.initials: P
authors.lastname: Rohde
authors.affiliation: Oregon Research Institute.
authors.forename: Heather
authors.initials: H
authors.lastname: Shaw
authors.affiliation: Oregon Research Institute.
authors.forename: C Nathan
authors.initials: CN
authors.lastname: Marti
mesh_terms: D000293:Adolescent; D001828:Body Image; D015992:Body Mass Index; D001068:Feeding and Eating Disorders / Q000517:prevention & control* / Q000523:psychology; D005260:Female; D005500:Follow-Up Studies; D015438:Health Behavior; D006801:Humans; D009765:Obesity / Q000517:prevention & control* / Q000523:psychology; D013334:Students / Q000523:psychology; D016896:Treatment Outcome; D014495:Universities; D055815:Young Adult