title: DSM-IV or ICD-10-DCR diagnoses in child and adolescent psychiatry: does it matter?
abstract: OBJECTIVE
  DSM-IV is the most widely used diagnostic classification system in research, whereas ICD-10 is more widely used clinically. Knowledge of differences is essential when research findings are implemented in daily clinical practice. We examined differences between the two diagnostic systems regarding three major child psychiatric diagnostic categories.
  
  
  METHODS
  A total of 199 consecutively referred, child psychiatric patients were interviewed with a semistructured diagnostic interview (K-SADS-PL) including questions covering specific ICD-10-DCR criteria, and diagnosed according to both diagnostic systems.
  
  
  RESULTS
  Differences were found regarding the diagnoses major depressive disorder/depressive episode and attention deficit hyperactivity disorder/disturbance of activity and attention. In both cases, more children met DSM-IV-TR criteria than ICD-10-DCR criteria. The diagnosis, oppositional defiant disorder, proved interchangeable between the two diagnostic systems.
  
  
  CONCLUSIONS
  Differences between diagnostic systems must be taken into account when research findings using one diagnostic system are implemented with children diagnosed by another diagnostic system.
authors.affiliation: Psychiatric Hospital for Children and Adolescents, Harald Selmersvej 66, 8240, Risskov, Denmark.
authors.forename: Merete Juul
authors.initials: MJ
authors.lastname: Sørensen
authors.forename: Ole
authors.initials: O
authors.lastname: Mors
authors.forename: Per Hove
authors.initials: PH
authors.lastname: Thomsen
mesh_terms: D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000145:classification / Q000175:diagnosis; D019958:Attention Deficit and Disruptive Behavior Disorders / Q000145:classification / Q000175:diagnosis; D002648:Child; D003718:Denmark; D003863:Depression / Q000145:classification / Q000175:diagnosis; D003865:Major Depressive Disorder / Q000145:classification / Q000175:diagnosis; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006778:Hospitals, Psychiatric; D006801:Humans; D038801:International Classification of Diseases / Q000706:statistics & numerical data*; D007406:Interview, Psychological; D008297:Male; D001523:Mental Disorders / Q000145:classification / Q000175:diagnosis*; D010343:Patient Admission; D011594:Psychometrics / Q000706:statistics & numerical data; D015203:Reproducibility of Results