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Homelessness and mental illness in a professional- and peer-led cocaine treatment clinic.

The combined problems of substance abuse, mental illness, and homelessness among the urban poor represent a major public health issue. The study evaluated 340 patients attending a cocaine day treatment program that integrates peer leadership and professional supervision. Thirty-six percent of the sample had a major mental illness, and 39 percent were homeless. Sixty-nine percent achieved an acceptable final urine toxicology status, and the median number of program visits was 46. Homelessness, a longer history of cocaine use, and a diagnosis of schizophrenia were associated with positive treatment outcomes. The results support the feasibility of a cocaine abuse treatment model combining professional and peer leadership.