J Korean Neuropsychiatr Assoc.  2012 Mar;51(2):77-84.

Study on Standardization of Korean Version of Psychiatric Diagnostic Screening Questionnaire : The Optimal Cutoff Scores

• Kwak JH
• Kim JB
• Choi JS
• Kim HC
• Jung SW
• Lee EJ
• Sung HM
• Sakong JK
• Shin IH
• Jung CH

Abstract

OBJECTIVES
An exact diagnosis and comorbidity analysis are important in psychiatric disorders. The Psychiatric Diagnostic Screening Questionnaire (PDSQ) is both useful as a self-reporting test for screening psychiatric disorders and available for clinical settings due to its simplicity and convenience. This study, as a part of standardization of Korean version of Psychiatric Diagnostic Screening Questionnaire (K-PDSQ), evaluated optimal cutoff scores.
METHODS
The samples were 696 patients in total, who were selected from the psychiatric departments of 3 university hospitals from March 2008 to August 2011. Diagnosing by Mini-International Neuropsychiatric Interview-Plus (MINI-Plus), we evaluated sensitivity, specificity, cutoff scores, ROC curve, and area under the curve (AUC) of K-PDSQ. SPSS version 12.0 for Windows and MedCalc version 12.0 were used to analyze the results.
RESULTS
With a cutoff score of 9 for major depressive disorder in K-PDSQ, both the sensitivity and specificity were 80%. The cutoff scores of PTSD, OCD, panic disorder, agoraphobia, psychosis, alcohol related problem, GAD, hypochondriasis, and social phobia of K-PDSQ were 5, 2, 4, 2, 1, 2, 5, 4, and 5, respectively. In most of the subscales, each AUC was above 0.75.
CONCLUSION
By applying the cutoff scores estimated above, we expect K-PDSQ to help provide diagnostic assessments and to grasp comorbidities before a clinical interview in the setting of busy outpatient clinics.

Keyword

Psychiatric Diagnostic Screening Questionnaire; Screening; Diagnostic instrument; Psychiatric disorder

MeSH Terms

Agoraphobia
Ambulatory Care Facilities
Area Under Curve
Comorbidity
Depressive Disorder, Major
Hand Strength
Hospitals, University
Humans
Hypochondriasis
Mass Screening
Panic Disorder
Phobic Disorders
Psychotic Disorders
Surveys and Questionnaires
ROC Curve
Sensitivity and Specificity
Stress Disorders, Post-Traumatic

Figure

• 

  Fig. 1 Receiver operating curves for each of K-PDSQ subscale in 696 psychiatric patients. All curves were significant (p<0.001). MDD : Major depressive disorder, PTSD : Posttraumatic stress disorder, OCD : Obsessive-compulsive disorder, Panic : Panic disorder, Alcohol : Alcohol-related problems, GAD : Generalized anxiety disorder, Social : Social phobia, K-PDSQ : Korean version of Psychiatric Diagnostic Screening Questionnaire.

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