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Progress in the classification of functional psychoses.

W Coryell1, M Zimmerman

  • 1Department of Psychiatry, University of Iowa College of Medicine, Iowa City 52242.

The American Journal of Psychiatry
|November 1, 1987
PubMed
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New diagnostic criteria in psychiatry showed validity but no improvement over time. This study evaluated the Feighner criteria, Research Diagnostic Criteria, and DSM-III for nonmanic psychoses.

Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Psychopathology

Background:

  • Diagnostic systems in American psychiatry evolved over time.
  • The Feighner criteria, Research Diagnostic Criteria, and DSM-III represent sequential advancements.
  • Previous assumptions of increased validity with newer criteria have been rarely tested.

Purpose of the Study:

  • To directly test the incremental validity of successive diagnostic criteria sets.
  • To compare the diagnostic validity of Feighner criteria, Research Diagnostic Criteria, and DSM-III.
  • To assess diagnostic distinctions in nonmanic psychoses.

Main Methods:

  • Applied Feighner criteria, Research Diagnostic Criteria, and DSM-III to 98 patients.
  • Utilized family history data for validity assessment.

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  • Employed 6-month follow-up data for validity assessment.

    • Main Results:

    • All three diagnostic systems demonstrated strong validity.
    • Family history and follow-up data supported the diagnostic distinctions made by each system.
    • No significant increments in diagnostic validity were observed with successively developed criteria sets.

    Conclusions:

    • The validity of diagnostic distinctions in nonmanic psychoses is supported across different criteria sets.
    • Successive diagnostic criteria sets did not demonstrate improved validity over earlier versions.
    • Further research is needed to enhance the validity of psychiatric diagnostic systems.