The Combined Effect of Drug Treatment and Supervision on Florida Drug-Involved Probationers (1996-2000)

Pamela K. Lattimore, RTI International
Kevin Strom, RTI International
Alexander J. Cowell, RTI International

This study represents the first preliminary analysis in a NIDA-funded drug court study on the efficacy of drug courts and traditional, probation-based programs in Florida. The research will seek to gain an improved understanding for the combined effects of supervision levels and specific treatment modalities on criminal recidivism over a five-year period for all probationers in the State. The study develops additional data sources that will allow for a more comprehensive evaluation of the effectiveness of these programs over an extended period of time. This builds on prior research that has estimated the effects of Florida's residential and non-residential drug treatment programs on "drug-involved" probationers (Lattimore et al., 1998; Lattimore and Linster, 1998). We will extend past research by examining the relationship of conditions of supervision (regular probation vs. drug offender probation) and type of treatment (residential, non-residential, no treatment) and the impact these factors have on re-arrest, re-incarceration, and time until first arrest. Findings indicate that residential treatment was estimated to reduce the number of failures (i.e., arrests for new offenses) by about 14% over what would have been expected with no treatment. Non-residential treatment was estimated to have reduced the expected number of failures by about 3% over what would have been expected with no treatment. Survival analysis will be used to evaluate the combined effect of supervision type and treatment modality on time until failure.

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Updated 05/20/2006