MIDAS Project
Publication Abstracts
Zimmerman, M., Mattia, J.I. The reliability and validity of a screening
questionnaire for 13 DSM-IV Axis I disorders (The Psychiatric Diagnostic
Screening Questionnaire). Journal of Clinical Psychiatry, 2005, 60,
677-683.
Background: The purpose of this study was to examine the
reliability and validity of a new multidimensional screening instrument
for 13 DSM-IV Axis I disorders. Method: The Psychiatric Diagnostic
Screening Questionniare (PDSQ) is a 90-item self-administered
questionnaire that screens for 13 DSM-IV disorders in five areas (eating,
mood, anxiety, substance use, and somatoform disorders). A consecutive
series of 500 psychiatric outpatients completed the PDSQ immediately
before their intake evaluation. Seventy-four patients completed the scale
a second time less than a week after the initial administration, and 51
patients completed a booklet of questionnaires that included established
measures of the same symptom domains assessed by the PDSQ. Results: The
PDSQ subscales achieved moderate-high levels of internal consistency (mean
alpha coefficient=.82) and test-retest reliability (mean correlation
coefficient=.84). Subscale scores were significantly associated with blind
clinical diagnoses, and individual PDSQ items correlated much more highly
with their own subscale than with other subscales. The PDSQ subscales were
much more highly correlated with established measures of the same symptom
domain (mean correlation coefficient=.79), than with measures of other
types of psychopathology (mean correlation=.18). Conclusion: The
PDSQ is a reliable and valid measure of multiple DSM-IV disorders that is
brief enough so that it can be incorporated into routine clinical
outpatient practice without disruption, yet lengthy enough to be a
psychometrically sound instrument.
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