Of the 920 opioid-dependent adults, 55.9% were randomized patients (Table 1). The randomized group was slightly younger (mean age: 35.5 vs. 36.9 years, p=0.04) and included more employed individuals (55.0% vs. 41.5%, p<0.001) than the non-randomized group (opioid-dependent adults who either did not meet the full inclusion/exclusion criteria or who met the full criteria but did not continue for personal reasons). The groups did not differ in sex, race/ethnicity, years of education, marital status, and past-year alcohol or drug use. Overall, 67.1% were men, 31.2% were nonwhite (13.0%, African-American; 10.0%, Hispanic; 8.2%, other), 46.1% received some post-secondary education, and 45.7% were never married.
