CO-OCCURING DISORDERS RESEARCH STUDY CSAT Co-Occurring Disorders Initiative AHP conducted a primary research study comparing two methadone maintenance programs for persons with co-occurring substance abuse and mental health disorders. This longitudinal, intent-to-treat design followed admission and in-treatment samples for 12 months. The stratified, in-treatment sample included persons who had been in treatment for up to four years at the time of study enrollment. By including this in-treatment group, we were able to ask the same set of questions about persons who remained in the program beyond one year; as this was a select group it was the only way to address questions about the effects of the programs on longer-stay clients within the resources of the cooperative agreement. To help staff in both programs understand and adhere to the model being tested, AHP staff developed program manuals for both parallel and integrated treatment approaches. AHP staff members have given presentations on this study at professional conferences such as the annual meeting of the American Public Health Association (APHA), grantee meetings, and local site advisory committee meetings.
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