Validation of the Korean version of the 16-Item Prodromal Questionnaire in a Non-Help-Seeking College Population
- Author:
Sung Wan KIM
1
;
Young Chul CHUNG
;
Young Shin KANG
;
Jae Kyeong KIM
;
Ji Eun JANG
;
Min JHON
;
Ju Yeon LEE
;
Jae Min KIM
;
Il Seon SHIN
;
Jin Sang YOON
Author Information
- Publication Type:Original Article
- Keywords: Schizophrenia; Ultra-high risk; Attenuated psychosis syndrome; PQ-16; Screening
- MeSH: Diagnosis; Humans; Mass Screening; Psychotic Disorders; Reproducibility of Results; ROC Curve; Schizophrenia; Sensitivity and Specificity; Young Adult
- From:Psychiatry Investigation 2018;15(2):111-117
- CountryRepublic of Korea
- Language:English
- Abstract: OBJECTIVE: To examine the reliability and validity of the Korean version of the 16-item Prodromal Questionnaire (KPQ-16) in non-help-seeking university students. METHODS: Among 2,246 university students participated in the initial screening, 257 subjects with KPQ-16 scores ≥4 were interviewed. The criteria for ultra-high risk (UHR) of psychosis of the Comprehensive Assessment of At-Risk Mental States (CAARMS) were the gold standard for diagnosis. An exploratory modified version of the questionnaire (mKPQ-16), to which three items from the Eppendorf Schizophrenia Inventory were added, was also used to compensate for items on thought and cognitive problems. RESULTS: Seventeen subjects met the CAARMS criteria for UHR of psychosis. The area under the receiver operating characteristic curve (AUROC) was highest for the mKPQ-16 total score (AUROC=0.831, p < 0.001). The use of cutoff total scores of 7 for the mKPQ-16 and 6 for the KPQ-16 resulted in the best balance of sensitivity (76.5% and 64.7%, respectively) and specificity (75.4% and 71.2%, respectively). CONCLUSION: The Korean versions of the PQ-16 are good instruments for screening for psychosis risk in university students. This validation of a questionnaire version with a small number of items may make it feasible to screen large numbers of young adults in the community.
