 There is abundant evidence that rates of comorbidity between substance use and depression are high 1, 2 and the risk of poor outcome is higher among individuals with the dual disorder compared with those with a single disorder 3, 4, 5, 6. Previous research has shown that about 50 of persons studied with severe mental illness and past substance abuse are likely to have a recurrence of substance abuse within 1 year of discharge from treatment 7. 