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The IES-R is a 22-item self-report measure (for DSM-IV) that assesses subjective distress caused by traumatic events.

A total IES-R score of 33 or over from a theoretical maximum of 88 signifies the likely presence of PTSD. The IES-R (and IES) is usually not used to diagnosis PTSD, however, cutoff scores for a preliminary diagnosis of PTSD have been cited in the literature. Completion time is 5 minutes.

The summed score ranged from 0 to 18, with higher scores indicating greater PTSD symptoms. The IES-6 [23] is a 6-item short version of the Impact of Event Scale-Revised (IES-R) [24] that measures the principal components of PTSD [18]. The IES-6 demonstrated good sensitivity (r = . 88) and specificity (r = .

The Impact of Event Scale – Revised (IES-R) was designed as a measure of post-traumatic stress disorder (PTSD) symptoms, and is a short, easily administered self-report questionnaire. It can be used for repeated measurements over time to monitor progress and is best used for recent and specific traumatic events.

Scores range from 0 to 35 for intrusion, 0 to 40 for avoidance, and 0 to 75 for the total score. The total score can be interpreted ing to the following dimensions of post-traumatic stress symptoms: 0 to 8 (subclinical range), 9 to 25 (mild range), 26 to 43 (moderate range), 44+ (severe range).

The Impact of Event Scale-Revised (Weiss & Marmar, 1997) is a 22-item scale which is rated on a 0 (not at all) to 4 (extremely) scale with respect to how distressing each item has been during the past week.

Impact of Event Scale - Revised (IES-R) is a 22-item self-report measure that assesses subjective distress caused by traumatic events. The 15-item IES is the original scale, but is missing hyperarousal symptom. It is a revised version of the older version, the 15-item IES.