Study	Outcome	Longest follow‐up	Intervention	Comparison	Effect size
Milby 1996 (67)	Alcohol use (mean) Addiction Severity Index ‐ number days in past 30 days alcohol used	12 months	Intervention clients reported a greater reduction in alcohol use over the last 30 days than control clients (p=.026). EC had 8 days fewer of reported alcohol use in the past 30 days from baseline to 12‐months with no difference in the UC group.
Milby 1996 (67)	Drug use – urine tests Proportion/median positive cocaine toxicologies	12 months	Percent cocaine‐positive urine toxicologies revealed a significant difference between the two treatment groups across all time points (p=.0003). Intervention group had 4% fewer positive cocaine toxicologies at 12 months than control group.
Milby 1996 (67)	Employment – self report (mean) Addiction Severity Index ‐ number days employed in past 30 days	12 months	The longitudinal difference between groups was not statistically significant across all time points (p=.504).