A Study on Reliability and Validity of the Korean Version of Impact of Event Scale-Revised

Eun, Hun Jeong; Kwon, Tae Wan; Lee, Sun Mi; Kim, Tae Hyoung; Choi, Mal Rye; Cho, Soo Jin

Abstract

OBJECTIVES
The present study was conducted to explore the reliability and validity of the "Impact of Event Scale-Revised Korean version" (IES-R-K).
METHODS
The subjects were college students who visited a college counseling center and patients who were admitted to a general hospital and two orthopedic local clinics. Those subjects who experienced catastrophic traumatic events were tested for CAPS, BDI, STAI-I, II, and MMPI-PTSD scale.
RESULTS
The range of correlations between item-total were .45-.89. The coefficients of internal consistency were .69-.83, of them were the Split-half reliability was .71 and the test-retest reliability was .89, all within expected ranges. Inter-correlations of IES-R-K, CAPS, BDI, STAI-I, II, and MMPI-PTSD scale were high. CAPS showed the highest correlation coefficient. Factor analysis indicated 4 factors in IES-R;avoidance, hyperarousal, intrusion, and sleep problem & numbness. IES-R-K can be a useful self-rating diagnostic instrument for PTSD symptoms to be a clinical concern by using 24/25 cutoff in total score. The partial PTSD cutoff score is 17/18.
CONCLUSION
The IES-R-K was confirmed in it's reliability and validity. IES-R-K could be applied for screening of PTSD.