“…In some cases, researchers also documented changes in related problems such as criminal recidivism, physical and mental illnesses, and employment (e.g., Brady & Ashley, 2005;Clark, 2001;Dodge & Willander, 2001;Greenfield et al, 2004;Hall et al, 2004;Hser, Evans, & Huang, 2005;Inciardi, Martin, & Butzin, 2004;McLellan et al, 2003;Peters, Haas, & Hunt, 2002;Sowers et al, 2002). Although the nature of treatment programs varies substantially (e.g., therapeutic communities, 12-step programs, residential treatment, outpatient programs), the findings on substance abuse treatment can be summed up as showing that substance abuse treatment is not 100% effective, but it is generally more effective than no treatment.…”