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J Korean Med Sci. 2016 Jan;31(1):114-9. doi: 10.3346/jkms.2016.31.1.114. Epub 2015 Dec 24.

Korean Version of Inventory of Complicated Grief Scale: Psychometric Properties in Korean Adolescents.

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Department of Psychiatry, Chung Ang University Hospital, Seoul, Korea.
Department of Psychiatry, College of Medicine, Dankook University, Cheonan, Korea.
Department of Psychiatry, Seoul Metropolitan Children's Hospital, Seoul, Korea.
Student Mental Health Research & Resource Center, Kyungpook National University Medical Center, Daegu, Korea.
Korean Brain Research Institute - Student Mental Health Research Center, Daegu, Korea.
Department of Social Welfare, Kyungpook National University Graduate School, Daegu, Korea.
Research Division, Korea Brain Research Institute, Daegu, Korea.
School of Social Welfare, Soongsil University, Seoul, Korea.
Student Mental Health Research & Resource Center, Kyungpook National University Medical Center, Daegu, Korea.; Department of Psychiatry, Kyungpook National University Hospital, Daegu, Korea.


We aimed to validate the Inventory of Complicated Grief (ICG)-Korean version among 1,138 Korean adolescents, representing a response rate of 57% of 1,997 students. Participants completed a set of questionnaires including demographic variables (age, sex, years of education, experience of grief), the ICG, the Children's Depression Inventory (CDI) and the Lifetime Incidence of Traumatic Events-Child (LITE-C). Exploratory factor analysis was performed to determine whether the ICG items indicated complicated grief in Korean adolescents. The internal consistency of the ICG-Korean version was Cronbach's α=0.87. The test-retest reliability for a randomly selected sample of 314 participants in 2 weeks was r=0.75 (P<0.001). Concurrent validity was assessed using a correlation between the ICG total scores and the CDI total scores (r=0.75, P<0.001). The criterion-related validity based on the comparison of ICG total scores between adolescents without complicated grief (1.2 ± 3.7) and adolescent with complicated grief (3.2 ± 6.6) groups was relatively high (t=5.71, P<0.001). The data acquired from the 1,138 students was acceptable for a factor analysis (Kaiser-Meyer-Olkin Measure of Sampling Adequacy=0.911; Bartlett's Test of Sphericity, χ(2)=13,144.7, P<0.001). After omission of 3 items, the value of Cronbach's α increased from 0.87 for the 19-item ICG-Korean version to 0.93 for the 16-item ICG-Korean version. These results suggest that the ICG is a useful tool in assessing for complicated grief in Korean adolescents. However, the 16-item version of the ICG appeared to be more valid compared to the 19-item version of the ICG. We suggest that the 16-item version of the ICG be used to screen for complicated grief in Korean adolescents.


Adolescent; Complicated Grief; Factor Analysis, Statistical; Reliability of Results; Screening

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