Trauma and Temperament as Predictors of Intensity of Posttraumatic Stress Disorder Symptoms After Disaster

This study assesses the impact of temperament and trauma considered as predictors of Posttraumatic Stress Disorder (PTSD) symptoms experienced during flood and coal mining accidents. Five samples were studied - one comprised of coal miners who experienced a mining catastrophe (N = 52) and four samples of flood victims (N = 1041), including 562 females. PTSD symptoms were measured - depending on the sample under study - at different time periods (from 3 months to 3 years), and in two samples repeated measures were taken. For measuring symptoms of PTSD the PTSD-Factorial Version inventory constructed in our laboratory was applied. Temperamental traits were assessed by means of the Formal Characteristics of Behavior - Temperament Inventory. Intensity of trauma and prolonged trauma consequences were measured by means of an interview. For analyzing the data coefficients of correlation and hierarchical regression were used. In all samples such temperament traits as briskness and endurance act as buffers resulting in lowering the effect of trauma inducing events. On the other hand, perseverance and emotional reactivity act as augmenters that result in increasing the effect of experienced trauma. In all samples emotional reactivity was the best predictor of the intensity of PTSD symptoms. In samples in which measures of trauma were included both variables - trauma and emotional reactivity - contributed essentially as predictors of PTSD symptoms and this held true independent of whether PTSD was assessed 3 months, 15 months, or 3 years after experiencing the disaster (flood).