Psychiatry Investig.  2019 Feb;16(2):109-114. 10.30773/pi.2018.10.23.

Validation of the Korean Version of the Prodromal Questionnaire-Brief Version in Non-Help-Seeking Individuals

• Jang YE
• Lee TY
• Hur JW
• Kwon JS

• KMID: 2440621
• DOI: http://doi.org/10.30773/pi.2018.10.23

Abstract

OBJECTIVE
In this study, we examined the reliability and validity of the Korean version of the Prodromal Questionnaire-Brief (PQ-B), a self-report screening instrument for clinical high risk for psychosis (CHR).
METHODS
A total of 3,400 middle, high school and college students participated, and 261 subjects with a PQ-B total score ≥3 completed both the PQ-B and the Structured Interview for Prodromal Syndromes (SIPS). Receiver operating characteristic (ROC) curves were used to examine the psychometric properties of the PQ-B.
RESULTS
A cut-off of 7 for the PQ-B total score and a cut-off of 22 for the PQ-B distress score showed the best balance of sensitivity (72.2%, 77.8%) and specificity (71.4%, 75.0%).
CONCLUSION
The Korean version of the PQ-B showed good reliability and validity for predicting prodromal risk symptoms in the community population.

Keyword

Schizophrenia; Early psychosis; Clinical high risk; Ultra high risk; Screening; PQ-B

MeSH Terms

Humans
Mass Screening
Prodromal Symptoms
Psychometrics
Psychotic Disorders
Reproducibility of Results
ROC Curve
Schizophrenia
Sensitivity and Specificity