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The symptom structure of ICD‐11 posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD) and the validity of the International Trauma Questionnaire (ITQ) are yet to be tested among civilians in an active war zone. The present investigation examined the factor structure of the ITQ, the internal consistency of observed scores, and their associations with demographic characteristics and war‐related experiences using a nationwide sample of 2,004 adults from the general population of Ukraine approximately 6 months after the full‐scale Russian invasion in 2022. Overall, rates of endorsement across all symptom clusters were high. The mean total number of war‐related stressors reported was 9.07 (SD = 4.35, range: 1–26). Internal reliability was good for all six ITQ subscales, Cronbach's αs =.73–.88, and the correlated six‐factor model was found to provide the best representation of the latent structure of the ITQ in the present sample based on fit indices. There was evidence of a dose–response relationship, with increasing scores on all symptom clusters associated with higher total reported war‐related stressors. [ABSTRACT FROM AUTHOR]

Background: High rates of posttraumatic stress disorder (PTSD) have been documented in war‐affected populations. The prevalence of Complex PTSD (CPTSD) has never been assessed in an active war zone. Here, we provide initial data on war‐related experiences, and prevalence rates of ICD‐11 PTSD and CPTSD in a large sample of adults in Ukraine during the Russian war. We also examined how war‐related stressors, PTSD, and CPTSD were associated with age, sex, and living location in Ukraine. Method: Self‐report data were gathered from a nationwide sample of 2004 adult parents of children under 18 from the general population of Ukraine approximately 6 months after Russia's invasion. Results: All participants were exposed to at least one war‐related stressor, and the mean number of exposures was 9.07 (range = 1–26). Additionally, 25.9% (95% CI = 23.9%, 27.8%) met diagnostic requirements for PTSD and 14.6% (95% CI = 12.9%, 16.0%) met requirements for CPTSD. There was evidence of a strong dose–response relationship between war‐related stressors and meeting criteria for PTSD and CPTSD. Participants who had the highest exposure to war‐related stressors were significantly more likely to meet the requirements for PTSD (OR = 4.20; 95% CI = 2.96–5.95) and CPTSD (OR = 8.12; 95% CI = 5.11–12.91) compared to the least exposed. Conclusions: Humanitarian responses to the mental health needs of the Ukrainian population will need to take account of posttraumatic stress reactions. Education in diagnosing and treating PTSD/CPTSD, especially in the situation of a significant lack of human resources and continuing displacement of the population, is necessary. [ABSTRACT FROM AUTHOR]