Citation

Jang YE, Lee TY, Hur JW, Kwon JS. Psychiatry Investig. 2019; 16(2): 109-114.

Affiliation

Department of Brain and Cognitive Sciences, Seoul National University College of Natural Sciences, Seoul, Republic of Korea.

Copyright

(Copyright © 2019, Korean Neuropsychiatric Association)

DOI

10.30773/pi.2018.10.23

PMID

30808116

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.

Language: en

Keywords

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