title: An exploratory examination of patient and parental self-efficacy as predictors of weight gain in adolescents with anorexia nervosa.
abstract: OBJECTIVE
  To determine whether increases in adolescent or parental self-efficacy predicted subsequent weight gain in two different therapies for adolescent anorexia nervosa (AN).
  
  
  METHODS
  Participants were 121 adolescents with AN (M = 14.4 years, SD = 1.6), from a two-site randomized clinical trial for family-based treatment (FBT) and individual adolescent focused therapy (AFT). Both adolescent and parental self-efficacy were assessed at baseline and sessions 2, 4, 6, and 8. Adolescent self-efficacy was assessed using a generic measure of self-efficacy, while parental self-efficacy was assessed using a measure specific to the recovery of an eating disorder. Weight was assessed at baseline, sessions 1 through 8, and end of treatment. Mixed-effects models were used to evaluate the relation between patient and parent self-efficacy and subsequent weight gain, controlling for weight at the previous time point.
  
  
  RESULTS
  For families who received FBT, greater within-treatment increases in parental self-efficacy predicted greater subsequent adolescent weight gain compared to those who received FBT with lesser change in parental self-efficacy and those who received AFT. Interestingly, adolescent self-efficacy did not significantly predict subsequent weight gain.
  
  
  CONCLUSIONS
  Greater increases in parental self-efficacy predicted significantly greater subsequent weight gain for adolescents who received FBT, but the same was not true for adolescents who received AFT. Neither overall level nor change in adolescent self-efficacy significantly predicted subsequent weight gain in either treatment group. These findings emphasize the importance of increasing parental self-efficacy in FBT in order to impact adolescent weight outcomes.
authors: Departments of Psychiatry and Pediatrics, University of California, San Francisco, San Francisco, CA 94143-0503.
authors: Catherine E
authors: CE
authors: Byrne
authors: Departments of Psychiatry and Pediatrics, University of California, San Francisco, San Francisco, CA 94143-0503.
authors: Erin C
authors: EC
authors: Accurso
authors: Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, California.
authors: Katherine D
authors: KD
authors: Arnow
authors: Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, California.
authors: James
authors: J
authors: Lock
authors: Departments of Psychiatry and Pediatrics, University of California, San Francisco, San Francisco, CA 94143-0503.
authors: Daniel
authors: D
authors: Le Grange
mesh_terms: D000293:Adolescent; D000856:Anorexia Nervosa / Q000628:therapy*; D005196:Family Therapy / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D011613:Psychotherapy; D015430:Weight Gain
keywords: adolescent anorexia nervosa; adolescent focused therapy; family-based treatment; parental self-efficacy; self-efficacy