Hiding from danger, not from fear: Lockdown as a risk factor of probable PTSD among civilians after Strasbourg Christmas market terror attack.

On December 11, 2018, five people were killed and 11 injured during a terrorist attack on Strasbourg's Christmas market. As the attacker was on the run during the night, part of the population was locked down for several hours. Our study aimed at assessing factors associated with the development of PTSD and health services use among the victims.