This updated Campbell systematic review examines the effectiveness incarceration‐based drug treatment interventions in reducing postrelease recidivism and drug use. The review summarises findings from 74 studies, 65 of which were conducted in the United States, four in Canada, three in Australia, one in Taiwan and one in the United Kingdom.
The main evidence presented in this review suggests that the effectiveness of treatment programs varies by the type of treatment. These findings most strongly support the effectiveness of therapeutic communities, as these programs produced relatively consistent reductions in recidivism and drug use. Boot camps have no effect on either outcome.
These conclusions should be read with caution given the limited number of such evaluations and general methodological weakness. Therapeutic community programs were the only programs to consistently show modest reductions in recidivism and drug relapse however, there is evidence of publication bias that could have over‐estimated its effectiveness. Given all these shortcomings, further evidence regarding the effectiveness of this type of intervention is needed.
Structured Abstract
BACKGROUNDMany, if not most, incarcerated offenders have substance abuse problems. Without effective treatment, these substance‐abusing offenders are likely to persist in non‐drug offending. The period of incarceration offers an opportunity to intervene in the cycle of drug abuse and crime. Although many types of incarceration‐based drug treatment programs are available (e.g., therapeutic communities and group counseling), the effectiveness of these programs is unclear.
OBJECTIVESThe objective of this research synthesis is to systematically review quasi‐experimental and experimental (RCT) evaluations of the effectiveness of incarceration‐based drug treatment programs in reducing post‐release recidivism and drug relapse. A secondary objective of this synthesis is to examine variation in effectiveness by programmatic, sample, and methodological features. In this update of the original 2006 review (see Mitchell, Wilson, and MacKenzie, 2006), studies made available since the original review were included in an effort to keep current with emerging research.
SEARCH STRATEGYWe searched bibliographic databases, hand searched select journals, and reviewed websites of several research organizations involved in drug treatment research to identify potentially eligible studies.
SEARCH CRITERIAEligible studies needed to assess the effectiveness of incarceration‐based (e.g., jail, prison) drug treatment programs, use experimental or quasi‐experimental comparison group research designs, measured a post‐release recidivism or drug use outcome, and be conducted between 1980 and 2011, inclusive.
DATA COLLECTION AND ANALYSISFrom each evaluation, we coded an effect size that quantified each program's effect on various measures of recidivism and/or drug relapse. We also coded features of the program, research methodology, and sample. We analyzed effect sizes using the random‐effects in...