Figure 1
From: Internet-based Self-Assessment after the Tsunami: lessons learned
Frequency of nightmares and flashbacks in the five sub-samples grouped by exposure severity. Blue bars indicate that only one in four respondents who were injured had no flashbacks and nightmares later. The proportion of those who reported occasional (red) or frequent (yellow bars) flashbacks and nightmares declines according to the severity of the exposure. Note that the differences between those who were actually injured and those who "only" witnessed is small.