Vouchers vs. Prizes for Cocaine-Dependent Methadone Patients - 2

March 29, 2012 updated by: UConn Health

Vouchers vs. Prizes for Cocaine-Dependent Methadone Patients

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 usual magnitude prize CM, (c) standard treatment plus higher magnitude prize CM, or (d) standard treatment plus voucher CM. Urine and breath samples are collected 2-3x/week for 14 weeks. Follow-up interviews are conducted at 1,3,6 and 9 months following intake during which substance use and psychosocial functioning are assessed.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

240

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Connecticut
      • Farmington, Connecticut, United States, 06030
        • UConn Health Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion criteria:

  • age > 18 years
  • current DSM-IV diagnosis of cocaine dependence
  • received methadone treatment at the clinic for at least 3 months
  • on a stable dose of methadone (no changes in dosing) for at least one month and not presently requesting a dose alteration
  • submitted one or more clinic-collected cocaine positive urine samples in the previous 3 months
  • English speaking
  • pass a brief quiz related to understanding of the informed consent form

Exclusion criteria:

  • have a serious, uncontrolled psychiatric illness (e.g., acute schizophrenia, bipolar disorder, severe or psychotic major depression, or suicide risk)
  • have dementia (<23 on the Mini Mental State Exam; Folstein et al. 1975)
  • are in recovery from pathological gambling

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 1
standard treatment plus usual magnitude prize CM
Behavioral: Contingency management
Rewards (prizes) for abstinence
Experimental: 2
standard treatment plus higher magnitude prize CM
Behavioral: Contingency management
Rewards (prizes) for abstinence
Experimental: 3
standard treatment plus voucher CM
Behavioral: Contingency management
Rewards (prizes) for abstinence

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Cocaine use
Time Frame: baseline and each follow-up
baseline and each follow-up

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

UConn Health

Collaborators

National Institute on Drug Abuse (NIDA)

Investigators

  • Principal Investigator: Nancy Petry, Ph.D., UConn Health

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2005

Primary Completion (Actual)

July 1, 2011

Study Completion (Actual)

July 1, 2011

Study Registration Dates

First Submitted

November 3, 2005

First Submitted That Met QC Criteria

November 3, 2005

First Posted (Estimate)

November 7, 2005

Study Record Updates

Last Update Posted (Estimate)

March 30, 2012

Last Update Submitted That Met QC Criteria

March 29, 2012

Last Verified

March 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • NIDA-13444-2
  • R01DA013444 (U.S. NIH Grant/Contract)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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