Vouchers vs. Prizes for Methadone Patients

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

76 participants

Study Classification

INTERVENTIONAL

Study Start Date

2003-08-31

Study Completion Date

2006-01-31

Brief Summary

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The purpose of this study is to compare voucher-based contingency management (CM) procedures to a lower-cost CM system that provides opportunities to win prizes. Cocaine-dependent outpatients are randomly assigned to (a) standard treatment, (b) standard treatment plus voucher CM for abstinence, defined by negative breath and urinalysis test results, or (c) standard treatment plus prize CM for abstinence, defined by negative breath and urinalysis test results. Urine and breath samples are collected 3x/week during Weeks 1-3, 2x/week during Weeks 4-6 and 1x/week during Weeks 7-12. Follow-up interviews are conducted 1,3,6 and 9 months following intake during which substance use and psychosocial functioning are assessed.

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Detailed Description

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Conditions

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Substance Abuse

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Interventions

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Contingency management

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* age \> 18 years
* current DSM-IV diagnosis of cocaine dependence
* maintained on a stable dose of methadone for \>1 month
* willing to sign informed consent
* English speaking

Exclusion Criteria

* serious, uncontrolled psychiatric illness (e.g., acute schizophrenia, bipolar disorder, or substantial suicide risk) on the basis of history or medical examination
* dementia (\<23 on the Mini Mental State Exam)
* in recovery from pathological gambling as determined by DSM-IV criteria

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No