title: Structure of obsessive-compulsive symptoms in pediatric OCD.
abstract: OBJECTIVE
  It is unclear whether the structure of obsessive-compulsive disorder (OCD) symptoms seen in adults is preserved in pediatric samples.
  
  
  METHODS
  A total of 238 children and adolescents referred to a specialty pediatric OCD clinic were administered the Children's Yale-Brown Obsessive Compulsive Scale Symptom Checklist, and its 13 major symptom categories were subjected to exploratory principal components analysis. The resulting factors were correlated with relevant clinical variables.
  
  
  RESULTS
  Principal components analysis identified four symptom dimensions explaining 55% of the total variance and broadly corresponding to those seen in adult samples. Boys were more likely to have sexual obsessions (34% vs. 18%, p = .01), whereas girls were more likely to endorse hoarding compulsions (53% vs. 36%, p=.009). High scores on the hoarding dimension were associated with increased levels of pervasive slowness, responsibility, indecisiveness, pathological doubt, depression and a variety of emotional difficulties, both self-rated and parent-rated.
  
  
  CONCLUSIONS
  The structure of OCD symptoms is similar across the lifespan. Hoarding symptoms are prevalent in pediatric OCD, especially among girls, and are associated with greater levels of disability.
authors.affiliation: The authors are with King's College London, Institute of Psychiatry. Electronic address: d.mataix@iop.kcl.ac.uk.
authors.forename: David
authors.initials: D
authors.lastname: Mataix-Cols
authors.affiliation: The authors are with King's College London, Institute of Psychiatry.
authors.forename: Eriko
authors.initials: E
authors.lastname: Nakatani
authors.affiliation: The authors are with King's College London, Institute of Psychiatry.
authors.forename: Nadia
authors.initials: N
authors.lastname: Micali
authors.affiliation: The authors are with King's College London, Institute of Psychiatry.
authors.forename: Isobel
authors.initials: I
authors.lastname: Heyman
mesh_terms: D000328:Adult; D000367:Age Factors; D002648:Child; D015928:Cognitive Behavioral Therapy; D004739:England; D005260:Female; D006801:Humans; D008297:Male; D009771:Obsessive-Compulsive Disorder / Q000175:diagnosis* / Q000523:psychology / Q000628:therapy; D010552:Personality Assessment / Q000706:statistics & numerical data*; D025341:Principal Component Analysis; D011594:Psychometrics / Q000706:statistics & numerical data; D015203:Reproducibility of Results; D012737:Sex Factors