Journal Article


Andreas Maercker
Chris R. Brewin
Philip Hyland



self report multiple regression analysis world health organization posttraumatic stress disorder factor 3 prospective study confirmatory factor analysis international classification

Predictive Validity of ICD-11 PTSD as Measured by the Impact of Event Scale-Revised: A 15-Year Prospective Study of Political Prisoners. (2016)

Abstract The 11(th) edition of the International Classification of Diseases (ICD-11; World Health Organization, 2017) proposes a model of posttraumatic stress disorder (PTSD) that includes 6 symptoms. This study assessed the ability of a classification-independent measure of posttraumatic stress symptoms, the Impact of Event Scale-Revised (Weiss & Marmar, 1996), to capture the ICD-11 model of PTSD. The current study also provided the first assessment of the predictive validity of ICD-11 PTSD. Former East German political prisoners were assessed in 1994 (N = 144) and in 2008-2009 (N = 88) on numerous psychological variables using self-report measures. Of the participants, 48.2% and 36.8% met probable diagnosis for ICD-11 PTSD at the first and second assessments, respectively. Confirmatory factor analysis supported the factorial validity of the 3-factor ICD-11 model of PTSD, as represented by items selected from the Impact of Event Scale-Revised. Hierarchical multiple regression analysis demonstrated that, controlling for sex, the symptom clusters of ICD-11 PTSD (reexperiencing, avoidance, and sense of threat) significantly contributed to the explanation of depression (R(2) = .17), quality of life (R(2) = .21), internalized anger (R(2) = .10), externalized anger (R(2) = .12), hatred of perpetrators (R(2) = .15), dysfunctional disclosure (R(2) = .27), and social acknowledgment as a victim (R(2) = .12) across the 15-year study period. Current findings add support for the factorial and predictive validity of ICD-11 PTSD within a unique cohort of political prisoners.
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Full list of authors on original publication

Andreas Maercker, Chris R. Brewin, Philip Hyland

Experts in our system

Andreas Maercker
Maynooth University
Total Publications: 14
Chris R. Brewin
National College Ireland
Total Publications: 25
Philip Hyland
National College of Ireland
Total Publications: 231