How many children develop Posttraumatic Stress Disorder after a traumatic experience such as an assault, a car crash, war or disaster? William Yule – one of the godfathers of child traumatic stress research – once pointed out that rates reported in separate studies varied from 0 to 100%.
So what is the average rate to be expected? With an international team of collaborators, we conducted a meta-analysis to answer this question.
The wide variety in individual study results suggests that various factors may be in play: apparently not every type of exposure, set of circumstances or group of children is related to similar PTSD rates. In addition, there may be methodological variation in the studies.
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