The sample (N = 684) was 36% female and 50% married/partnered, with a mean age of 38 years (SD = 10.7) (not shown). Ethnic composition was 76% white, 11% black, 9% Hispanic, and 5% other. A total of 43% were alcohol-only dependent, 27% were drug-only dependent, 16% were alcohol and drug dependent, and 4% had abuse diagnoses only.
