Fig. 5

Post-traumatic stress disorder in reference persons at 3 months. a Impact of Event Scale-revised (IES-R) represented by whisker boxes (horizontal line inside the box: median, upper, and lower boxes: limits 25–75th percentiles and T-bars: 10–90th percentiles, respectively). Scores exceeding 32 points (dashed line) on IES-R scale were considered as indicating a PTSD. b Prevalence of post-traumatic Stress Disorder (PTSD) in reference persons (RPs) at 3 months