title: Field trial for autistic disorder in DSM-IV.
abstract: OBJECTIVE
  This project focused on the development of the definition of autism for DSM-IV.
  
  
  METHODS
  Multiple sites were involved in obtaining information regarding 977 patients with the following clinician-assigned diagnoses: autism (N = 454), other pervasive developmental disorders (N = 240), and other disorders (N = 283). A standard coding system was used, and the raters (N = 125) had a range of experience in the diagnosis of autism. Patterns of agreement among existing diagnostic systems were examined, as was the rationale for inclusion of other disorders within the class of pervasive developmental disorders.
  
  
  RESULTS
  The DSM-III-R definition of autism was found to be overly broad. The proposed ICD-10 definition most closely approximated the clinicians' diagnoses. Inclusion of other disorders within pervasive developmental disorders appeared justified. Partly on the basis of these data, modifications in the ICD-10 definition were made; this and the DSM-IV definition are conceptually identical.
  
  
  CONCLUSIONS
  The resulting convergence of the DSM-IV and ICD-10 systems should facilitate both research and clinical service.
authors.affiliation: Child Study Center, Yale University, New Haven, CT 06510.
authors.forename: F R
authors.initials: FR
authors.lastname: Volkmar
authors.forename: A
authors.initials: A
authors.lastname: Klin
authors.forename: B
authors.initials: B
authors.lastname: Siegel
authors.forename: P
authors.initials: P
authors.lastname: Szatmari
authors.forename: C
authors.initials: C
authors.lastname: Lord
authors.forename: M
authors.initials: M
authors.lastname: Campbell
authors.forename: B J
authors.initials: BJ
authors.lastname: Freeman
authors.forename: D V
authors.initials: DV
authors.lastname: Cicchetti
authors.forename: M
authors.initials: M
authors.lastname: Rutter
authors.forename: W
authors.initials: W
authors.lastname: Kline
mesh_terms: D017668:Age of Onset; D001321:Autistic Disorder / Q000145:classification / Q000175:diagnosis*; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000145:classification / Q000175:diagnosis; D003937:Diagnosis, Differential; D005069:Evaluation Studies as Topic; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000145:classification / Q000175:diagnosis; D008297:Male; D009155:Mutism / Q000145:classification / Q000175:diagnosis; D011237:Predictive Value of Tests; D011569:Psychiatric Status Rating Scales / Q000592:standards* / Q000706:statistics & numerical data; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D009626:Terminology as Topic