The lifetime prevalence of PTSD for all participants was high (see Table 4). Cocaine dependent cases recruited from treatment were at almost double the risk for PTSD compared to the community-based participants (22.4% and 12.2%, respectively, p < .001). Repeating the analysis after dividing the community-based cohort into those with and without cocaine dependence showed that there were no statistical differences in the lifetime prevalence of PTSD between the cocaine dependent cases recruited from treatment and the cocaine dependent participants recruited from the community. The contrast between the cocaine dependent cases recruited from treatment and the community-based sample without cocaine dependence increased.
