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논문 기본 정보

자료유형
학술저널
저자정보
Seockhoon Chung (Department of Psychiatry, Asan Medical Center, University of Ulsan College of Medicine) Oli Ahmed (Department of Psychology, University of Chittagong, Chattogram, Bangladesh) Eulah Cho (Department of Psychiatry, Asan Medical Center, University of Ulsan College of Medicine) Young Rong Bang (Department of Psychiatry, Asan Medical Center, University of Ulsan College of Medicine) Junseok Ahn (Department of Psychiatry, Asan Medical Center, University of Ulsan College of Medicine) Hayun Choi (Department of Psychiatry, Veteran Health Service Medical Center) Yoo Hyun Um (Department of Psychiatry, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea) Jae-Won Choi (Department of Psychiatry, Nowon Eulji University Hospital, Eulji University School of Medicine) Seong Jae Kim (Department of Psychiatry, Chosun University Hospital, College of Medicine, Chosun University) Hong Jun Jeon (Department of Psychiatry, Konkuk University Medical Center, Konkuk University School of Medicine)
저널정보
대한신경정신의학회 PSYCHIATRY INVESTIGATION PSYCHIATRY INVESTIGATION Vol.21 No.1
발행연도
2024.1
수록면
9 - 17 (9page)
DOI
10.30773/pi.2023.0189

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초록· 키워드

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Objective The aim of this study was to explore the psychometric properties of the Insomnia Severity Index (ISI) based on modern test theory, such as item response theory (IRT) and Rasch analysis, with shortened versions of the ISI among the general population.Methods We conducted two studies to evaluate the reliability and validity of the shortened versions of the ISI in a Korean population. In Study I, conducted via online survey, we performed an exploratory factor analysis (n=400). In Study II, confirmatory factor analysis (CFA) was conducted (n=400). IRT and Rasch analysis were performed on all samples. Participants symptoms were rated using the ISI, Dysfunctional Beliefs and Attitudes about Sleep–16 items, Dysfunctional Beliefs about Sleep–2 items, Patient Health Questionnaire–9 items, and discrepancy between desired time in bed and desired total sleep time.Results CFA showed a good fit for the 2-factor model of the ISI (comparative fit index=0.994, Tucker–Lewis index=0.990, root-meansquare-error of approximation=0.039, and standardized root-mean-square residual=0.046). The 3-item versions also showed a good fit for the model. All scales showed good internal consistency reliability. The scale information curve of the 2-item scale was similar to that of the full-scale ISI. The Rasch analysis outputs suggested a good model fit.Conclusion The shortened 2-factor ISI is a reliable and valid model for assessing the severity of insomnia in the Korean population. The results are needed to be explored further among the clinical sample of insomnia.

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