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

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.