Abstract: | SUMMARY Substance abuse is a problem of national concern. This study sought to replicate and further develop findings from a previous study that found cocaine abusers continued in and completed treatment less frequently than alcohol abusers, and that family involvement may influence continuation in and completion of treatment for both cocaine and alcohol abusers. A sample of 99 primary cocaine abusers and 105 primary alcohol abusers in outpatient treatment were followed during the course of their treatment. Results indicated primary alcohol abusers were significantly more successful in completing treatment than primary cocaine abusers. Family involvement in treatment significantly increased the likelihood that cocaine and alcohol abusers would complete the full course of treatment. It is possible that treatment could be improved and completion rates increased by coordinating the involvement of the family. |