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Evaluation Review
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What's this?

A Statistical Perspective on the Design of Drug-Court Studies

Elizabeth L. C. Merrall

MRC Biostatistics Unit, Cambridge, United Kingdom, Elizabeth.merrall{at}mrc-bsu.cam.ac.uk

Sheila M. Bird

MRC Biostatistics Unit, Cambridge, United kingdom Strathclyde University, Glasgow, United Kingdom

Recent meta-analyses of drug-court studies recognized the poor methodological quality of the evaluations, with only a few being randomized. This article critiques the design of the randomized studies from a statistical perspective. Learning points are identified for future drug-court studies and are applicable to evaluations both of other specialist courts and of court-based interventions more generally. The specific issues covered are randomization, describing the intervention, and baseline characteristics; study outcomes, and sample size calculations; in-program and postprogram behavior, analysis plan, and presentation of results.

Key Words: drug-courts • study design • statistical • randomization

This version was published on June 1, 2009

Evaluation Review, Vol. 33, No. 3, 257-280 (2009)
DOI: 10.1177/0193841X08330819
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