Most of the cocaine dependent cases recruited from treatment and community-based participants experienced traumatic events. Ninety-four percent of cocaine dependent cases and 87% of community-based participants experienced at least one distressing event. Furthermore, it was uncommon for participants to suffer only one incident (13.0%). Though both groups were exposed to high rates of traumatic experiences, cocaine dependent cases recruited from treatment endured significantly more distressing events than the community-based participants (4.64 vs. 3.08, respectively, p < .001). Twenty-six percent of cocaine dependent cases from treatment experienced seven or more distinct traumatic events compared to only 11% of community-based comparison participants (p < .001).
