“…The IES-R, developed by Weiss and Marmar is a 22-item, 5-point scale (0, not at all; 1, a little bit; 2, moderately; 3, quite a bit; 4, extremely) with a Cronbach's alpha of 0.93. The IES-R Korean version yields a total score (ranging from 0 to 88) and subscale scores which can be calculated for the hyperarousal (consisting of the following items: 4, 10, 14,18,19,21), avoidance (consisting of the following items: 5,8,11,12,17,22), intrusion (consisting of the following items: 1,3,6,9,16), and sleep and numbness (consisting of the following items: 2, 7, 13, 15, 20) subscales of PTSD [10]. The internal consistency of the IES-R Korean version was 0.69-0.83 [11].…”