War-related stressors and ICD-11 (complex) post-traumatic stress disorders in Ukrainian students living in Kyiv during the Russian-Ukrainian war.

We estimated the prevalence of war-related stressors (Harvard Trauma Questionnaire-R), risk of ICD-11 posttraumatic stress disorder (PTSD), and complex posttraumatic stress disorder (CPTSD; International Trauma Questionnaire-R) in N = 563 Ukrainian students living in Kyiv, an active war zone between December 2022 and January 2023. Among trauma survivors (n = 381), we used multinomial logistic regression to examine whether different war-related traumatic events and cumulative trauma increased risk for ICD-11-PTSD and CPTSD after controlling for other traumatic events, age, and gender. Nine of ten Ukrainian students (91.