High rates of probable PTSD among Ukrainian war refugees: the role of intolerance of uncertainty, loss of control and subsequent discrimination.

Intolerance of uncertainty is a well-known predictor of post-traumatic stress symptoms following a traumatic event. At the same time, it is relatively unknown whether intolerance of uncertainty amplifies the effects of other adverse life events on PTSD symptoms among traumatized individuals. This article addresses this problem in a study of Ukrainian war refugees' experiences with post-migration discrimination and powerlessness (loss of control). 4972 forced immigrants from Ukraine took part in the study (90.2% women, = 40.4,  = 12.5) completing the PTSD-8 scale, measures of post-migration discrimination and loss of control experiences, and intolerance of uncertainty. Almost half of respondents (47.5%) have probable PTSD. Regression analysis confirmed that war-related experiences, as well as intolerance of uncertainty, post-migration loss of control and experiences of discrimination were significant predictors of self-reported PTSD symptoms. Also, intolerance of uncertainty weakly moderated the effects of experienced discrimination and control deprivation on self-reported PTSD symptoms, so that the effects of adverse post-migration experiences were more pronounced among individuals high in intolerance of uncertainty. Understanding the effect of post-migration experiences on war refugees' mental health is crucial for developing improved acculturation policies and fostering a supportive environment for forced migrants.