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Addiction. 2014 Sep;109(9):1426-36. doi: 10.1111/add.12589. Epub 2014 May 23.

Prize-based contingency management for the treatment of substance abusers: a meta-analysis.

Author information

1
Treatment Research Institute, Philadelphia, PA, USA; University of Pennsylvania, Department of Psychiatry, Philadelphia, PA, USA.

Abstract

AIM:

To review randomized controlled trials to assess efficacy of a prize-based contingency management procedure in reducing substance use (where a drug-free breath or urine sample provides a chance of winning a prize).

METHODS:

A meta-analysis was conducted on papers published from January 2000 to February 2013 to determine the effect size of studies comparing prize-based contingency management to a treatment-as-usual control condition (k = 19 studies). Parallel analyses evaluated the efficacy of both short- (k = nine studies) and long-term outcomes (k = six studies) of prize-based contingency management.

RESULTS:

The average end-of-treatment effect size (Cohen's d) was 0.46 [95% confidence interval (CI) = 0.37, 0.54]. This effect size decreased at the short-term (≤3-month) post-intervention follow-up to 0.33 (95% CI = 0.12, 0.54) and at the 6-month follow-up time-point there was no detectable effect [d = -0.09 (95% CI = -0.28, 0.10)].

CONCLUSION:

Adding prize-based contingency management to behavioral support for substance use disorders can increase short-term abstinence, but the effect does not appear to persist to 6 months.

KEYWORDS:

Contingency management; incentives; meta-analysis; prize-based; substance abuse treatment; substance use disorder

PMID:
24750232
PMCID:
PMC4203362
DOI:
10.1111/add.12589
[Indexed for MEDLINE]
Free PMC Article
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