Predictors of chronic trauma-related symptoms in a community sample of New Zealand motor vehicle accident survivors.

This study examined 1,500 New Zealand community-residing adults for involvement in serious motor vehicle accident (MVA) and the development of trauma-related symptomatology. The incidence of MVA was 11 %. More than 50 % of the accident victim sub-sample reported hyperarousal, with exaggerated startle, intrusive recollections, situational avoidance, emotional reactivity, and cognitive avoidance. The high incidence of trauma-related symptoms is noteworthy given 59 % of victims reported sustaining no or mild accident injury, and only 27 % were admitted to hospital for severe injury. Trauma-related symptoms were related to measures of injury severity, psychological and social functioning, and persistent medical problems. Pre- and post-accident factors, that is, experience of additional trauma, experience of stressful life events and post-accident social contact were the most important predictors of trauma-related symptoms severity. This study discusses the importance of examining trauma-related symptoms rather than using categorical diagnostic criteria (i.e., post-traumatic stress disorder, PTSD) as a sole means of characterizing the psychological impact of MVA.