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The Psychiatric Diagnostic Screening Questionnaire: development, reliability and validity.

M Zimmerman1, J I Mattia

  • 1Department of Psychiatry and Human Behavior, Brown University School of Medicine, Rhode Island Hospital, Providence, RI, USA.

Comprehensive Psychiatry
|May 12, 2001
PubMed
Summary
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The Psychiatric Diagnostic Screening Questionnaire (PDSQ) effectively screens for common mental health disorders in outpatient settings. Its revised version demonstrates high understandability and strong reliability and validity across 13 subscales.

Area of Science:

  • Psychiatry
  • Psychological Assessment
  • Mental Health Services Research

Background:

  • Outpatient mental health settings frequently encounter patients with various DSM-IV Axis I disorders.
  • Accurate and efficient screening tools are crucial for timely diagnosis and treatment initiation.

Purpose of the Study:

  • To evaluate the understandability, reliability, and validity of the Psychiatric Diagnostic Screening Questionnaire (PDSQ).
  • To refine the PDSQ for optimal use in screening common psychiatric disorders.

Main Methods:

  • Four studies involving over 2,500 outpatient mental health subjects were conducted.
  • Item understandability was assessed and items were revised to ensure >90% comprehension.
  • Reliability (internal consistency, test-retest) and validity (discriminant, convergent, concurrent) of 13 PDSQ subscales were examined.

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Main Results:

  • Revised PDSQ items achieved high understandability (>90%).
  • The final 13 PDSQ subscales demonstrated good to excellent internal consistency and test-retest reliability.
  • The PDSQ subscales exhibited strong discriminant, convergent, and concurrent validity.

Conclusions:

  • The revised Psychiatric Diagnostic Screening Questionnaire is a reliable and valid instrument for screening common DSM-IV Axis I disorders.
  • The PDSQ is suitable for use in outpatient mental health settings, aiding in the identification of conditions like MDD, PTSD, GAD, and substance use disorders.