Our dependent variable was a 4-level variable comprising individuals reporting none, one (1), two (2), and three or more (3+) DUIs. We chose this categorization based on the higher observed rates of alcohol dependence, drug use and psychiatric disorders among repeat offenders (Lapham et al., 2006) than first-time offenders (Lapham et al., 2001). Associations of demographic, alcohol, drug, and psychiatric variables with DUI status were tested using multinomial logistic regression, with the no DUI category as the reference group. All regressions included control variables for gender (since women [7.9%] were less likely than men [28.8%, p<.01] to report DUIs) and for stage participation, since individuals who participated in Stage 2 endorsed a greater number of alcohol dependence criteria items than individuals who participated only in Stage 1 (M[sd]=6.9 [6.9] vs. 4.6 [5.6], p<.01). When cell sizes for the 2 and 3+ DUI categories were too small to permit analysis the categories were combined to form a 2+ DUI category. Interactions of gender with each variable were tested. When there was a trend for a gender interaction (p≤.10), results were reparameterized
