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

Affiliations
  • 1Department of Nursing, Korea University, Seoul, Republic of Korea.
  • 2Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea. leetaey@gmail.com
  • 3Department of Psychology, Chung-Ang University, Seoul, Republic of Korea.
  • 4Department of Brain and Cognitive Sciences, Seoul National University College of Natural Sciences, Seoul, Republic of Korea.

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
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