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Related Experiment Videos

Reliability and accuracy of differentiating pervasive developmental disorder subtypes

W J Mahoney1, P Szatmari, J E MacLean

  • 1Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada.

Journal of the American Academy of Child and Adolescent Psychiatry
|March 31, 1998
PubMed
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The DSM-IV criteria reliably diagnose pervasive developmental disorders (PDD), Asperger's disorder (AsD), and autism, but show poor reliability for atypical autism, leading to potential misclassification.

Area of Science:

  • Child and Adolescent Psychiatry
  • Developmental Psychology
  • Psychometrics

Background:

  • Accurate diagnosis of pervasive developmental disorders (PDD) is crucial for effective intervention.
  • The Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) provides criteria for PDD subtypes.
  • Evaluating the reliability and accuracy of these diagnostic criteria is essential for clinical practice.

Purpose of the Study:

  • To assess the reliability and accuracy of DSM-IV criteria in differentiating PDD subtypes.
  • To identify potential challenges in the diagnostic process for specific PDD categories.

Main Methods:

  • A sample of 143 children with developmental disabilities was evaluated.
  • Diagnoses were made using the Autism Diagnostic Interview-Revised and Autism Diagnostic Observation Schedule.

Related Experiment Videos

  • Inter-rater reliability and diagnostic accuracy were assessed using kappa statistics and latent class analysis.

    • Main Results:

    • DSM-IV criteria demonstrated good to excellent reliability for PDD, Asperger's disorder (AsD), and autism.
    • Poor reliability was observed for the diagnosis of atypical autism.
    • Clinicians experienced more difficulty differentiating atypical autism compared to other PDD subtypes, with high error rates noted.

    Conclusions:

    • Current DSM-IV criteria are psychometrically acceptable for diagnosing autism and AsD.
    • A significant rate of misclassification is likely for children diagnosed with atypical autism.
    • Further refinement of diagnostic criteria for atypical autism may be warranted.