title: Does the interpersonal model apply across eating disorder diagnostic groups? A structural equation modeling approach.
abstract: BACKGROUND
  Interpersonal model has been validated with binge-eating disorder (BED), but it is not yet known if the model applies across a range of eating disorders (ED).
  
  
  OBJECTIVE
  The goal of this study was to investigate the validity of the interpersonal model in anorexia nervosa (restricting type; ANR and binge-eating/purge type; ANBP), bulimia nervosa (BN), BED, and eating disorder not otherwise specified (EDNOS).
  
  
  METHODS
  Data from a cross-sectional sample of 1459 treatment-seeking women diagnosed with ANR, ANBP, BN, BED and EDNOS were examined for indirect effects of interpersonal problems on ED psychopathology mediated through negative affect.
  
  
  RESULTS
  Findings from structural equation modeling demonstrated the mediating role of negative affect in four of the five diagnostic groups. There were significant, medium to large (.239, .558), indirect effects in the ANR, BN, BED and EDNOS groups but not in the ANBP group. The results of the first reverse model of interpersonal problems as a mediator between negative affect and ED psychopathology were nonsignificant, suggesting the specificity of these hypothesized paths. However, in the second reverse model ED psychopathology was related to interpersonal problems indirectly through negative affect.
  
  
  CONCLUSIONS
  This is the first study to find support for the interpersonal model of ED in a clinical sample of women with diverse ED diagnoses, though there may be a reciprocal relationship between ED psychopathology and relationship problems through negative affect. Negative affect partially explains the relationship between interpersonal problems and ED psychopathology in women diagnosed with ANR, BN, BED and EDNOS. Interpersonal psychotherapies for ED may be addressing the underlying interpersonal-affective difficulties, thereby reducing ED psychopathology.
authors.affiliation: Ottawa Hospital Research Institute, Canada; The Ottawa Hospital, Canada. Electronic address: iryna.ivanova@mail.utoronto.ca.
authors.forename: Iryna V
authors.initials: IV
authors.lastname: Ivanova
authors.affiliation: The Ottawa Hospital, Canada; University of Ottawa, Canada.
authors.forename: Giorgio A
authors.initials: GA
authors.lastname: Tasca
authors.affiliation: The Ottawa Hospital, Canada; University of Ottawa, Canada.
authors.forename: Geneviève
authors.initials: G
authors.lastname: Proulx
authors.affiliation: The Ottawa Hospital, Canada; University of Ottawa, Canada.
authors.forename: Hany
authors.initials: H
authors.lastname: Bissada
mesh_terms: D000293:Adolescent; D000328:Adult; D000856:Anorexia Nervosa / Q000175:diagnosis / Q000523:psychology; D056912:Binge-Eating Disorder / Q000175:diagnosis / Q000523:psychology; D002032:Bulimia / Q000175:diagnosis / Q000523:psychology; D052018:Bulimia Nervosa / Q000175:diagnosis / Q000523:psychology; D003430:Cross-Sectional Studies; D001068:Feeding and Eating Disorders / Q000175:diagnosis* / Q000523:psychology*; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008875:Middle Aged; D008960:Models, Psychological; D011613:Psychotherapy; D055815:Young Adult