Chi-square tests were used to test categorical variables by screening group, treatment services received, current SUD, and DOL. Since the distributions of treatment services reported were all highly skewed and few services were reported, we grouped services into discrete categories for analysis. The Bonferroni correction was used for pairwise comparisons. Univariate analyses were conducted to determine differences among the screening groups with respect to gender, age category at screening (<31 vs. 31+), education group (<12 years, 12 years, >12 years), and ethnicity (nonHispanic white, Hispanic, and other).
