We conducted a negative binomial regression to examine predictors of number of traumatic events. Group status (cocaine dependent cases or community-based cohort), gender, ethnicity, education and income were entered as categorical predictors. Group status (β = .385, p < .001), gender (β = .189, p < .001), ethnicity (β = .302, p < .001), and income (β = .142, p < .05) were significant predictors such that cocaine dependent cases, males, African Americans, and lower income participants were associated with a higher number of traumatic events. Analyses were repeated with cocaine dependence as a predictor rather than group status. Cocaine dependence (β = .500, p < .001) and African American ethnicity (β = .260, p <.01) significantly predicted a higher number of events, whereas gender and income were no longer significant.
