Validation of the Korean version of the Eppendorf Schizophrenia Inventory as a screening measure to detect adolescents at ultra-high risk for psychosis
- Authors
- Chung, Young-Chul; Kang, Nam-In; Im, Yong-Jin; Kim, Sung-Wan; Cho, In Hee; Lee, Young Moon; Kwon, Jun Soo
- Issue Date
- Feb-2013
- Publisher
- WILEY-BLACKWELL
- Keywords
- K-ESI; psychosis; schizophrenia; screening; ultra-high risk
- Citation
- EARLY INTERVENTION IN PSYCHIATRY, v.7, no.1, pp.71 - 79
- Journal Title
- EARLY INTERVENTION IN PSYCHIATRY
- Volume
- 7
- Number
- 1
- Start Page
- 71
- End Page
- 79
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/14768
- DOI
- 10.1111/j.1751-7893.2012.00363.x
- ISSN
- 1751-7885
- Abstract
- Aim: No validated self-report scale is available for use as a screening tool to detect non-help-seeking adolescents at ultra-high risk (UHR) for psychosis in a community setting. The study aims to examine the reliability and validity of the Korean version of the Eppendorf Schizophrenia Inventory (K-ESI) for assessing adolescents at UHR for psychosis in a community setting. Methods: In the first study, to confirm the reliability and discriminant validity of the K-ESI, community sample (782 adolescents, 281 young adults, 122 early and middle-aged adults) and outpatients with schizophrenia (109) were recruited. A single cross-sectional survey was performed using the K-ESI for the community sample and the K-ESI and Positive and Negative Syndrome Scale for patients. In the second study, the Korean version of Youth Self Report (K-YSR) was administered initially to 1002 students. Of the 217 students whose scores were equal to or higher than the cut-off point of the K-YSR, 120 who agreed to an in-depth evaluation were interviewed using the Comprehensive Assessment of At-Risk Mental States to confirm the predictive validity of the K-ESI. Results: The K-ESI showed good internal consistency and excellent testretest reliability and discriminant validity. However, the factor structure in adolescents was substantially different from that of the original ESI. The best cut-off point for the K-ESI to identify UHR adolescents was 29, with a sensitivity of 77% and a specificity of 70%. Conclusion: The results revealed that the K-ESI can be used as a valid and reliable instrument to identify adolescents at UHR for psychosis in a community setting.
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