The structure of post-traumatic stress symptoms in young survivors of war.

Research on the dimensionality of post-traumatic stress disorder (PTSD) has generally failed to provide support for the three clusters of PTSD suggested in the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV). However, much research has been restricted to samples in North America and Western European countries. The aim of the current study was to test four alternative factor models among a relatively understudied population-young civilian survivors of war who had experienced war-related events as adolescents-in order to establish whether the factor structure of PTSD is consistent among various traumatized populations and age groups. Using the Posttraumatic Stress Diagnostic Scale, the results indicated that the four-factor model including intrusion, avoidance, hyperarousal, and numbing factors provided a better fit than the three-factor model suggested by the DSM-IV. The current study offers additional support from another population for a four-factor model of PTSD that implies a separation of avoidance and numbing items. Case conceptualization and treatment implications are discussed.

The structure of post-traumatic stress symptoms in survivors of war: confirmatory factor analyses of the Impact of Event Scale--revised.

The study aimed at establishing the factor structure of the Impact of Event Scale-Revised (IES-R) in survivors of war. A total sample of 4167 participants with potentially traumatic experiences during the war in Ex-Yugoslavia was split into three samples: two independent samples of people who stayed in the area of conflict and one sample of refugees to Western European countries. Alternative models with three, four, and five factors of post-traumatic symptoms were tested in one sample. The other samples were used for cross-validation. Results indicated that the model of best fit had five factors, i.e., intrusion, avoidance, hyperarousal, numbing, and sleep disturbance. Model superiority was cross-validated in the two other samples. These findings suggest a five-factor model of post-traumatic stress symptoms in war survivors with numbing and sleep disturbance as separate factors in addition to intrusion, avoidance and hyperarousal.