Voucher-Based Incentives in a Prevention Setting

NCT ID: NCT00607269

Last Updated: 2013-08-01

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2/PHASE3
• Total Enrollment: 131 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2005-04-30
• Study Completion Date: 2008-02-29

Brief Summary

This study evaluates a contingency management program that rewards homeless, non-treatment-seeking substance abusing men who have sex with men (MSM) for abstaining from drugs and for performing prosocial behaviors. If this program motivates these individuals to increase prosocial and healthy behaviors and decrease drug/alcohol use, established prevention programs may modify their approaches to include contingency management, and use it to address the staggering public health problems homeless substance-abusing MSMs face on a daily basis.

Detailed Description

Homelessness is a significant problem plaguing American cities and homeless substance abusers face increased risks. Homeless, substance abusing men who have sex with men (MSM) suffer 80% HIV seroprevalence, engage in the sex trades and resist treatment for substance abuse. For almost 30 years, the Van Ness Recovery House (VNRH) has been providing treatment services to homeless substance-abusing MSMs in Hollywood, CA. In 1994, VNRH began providing community-based HIV prevention services to non-treatment seeking homeless substance-abusing MSMs through the VNPD, its prevention division. Contingency management interventions providing positive incentives for behavior change may be particularly well suited for this disenfranchised, high-risk cohort. Specifically, voucher-based incentive therapies (VBRT) may be particularly effective since they have established potency for increasing prosocial behaviors that successfully compete with taking drugs and for reducing drug use. A randomized, controlled trial will assign 144 non-treatment seeking homeless substance-abusing MSMs at VNPD to either VBRT or control groups (72/group) for 24 weeks, with planned follow up at 7, 9 and 12 months from randomization. The VBRT group will earn vouchers in exchange for completing prosocial and healthy behaviors and/or submitting drug-negative urine and alcohol-negative breath samples. Vouchers will be redeemable for goods located in an onsite voucher store. The control group will receive feedback regarding behaviors performed and urinalysis and breath alcohol tests, but will not receive voucher points for these behaviors. We will assess the efficacy of the VBRT intervention for increasing prosocial and healthy behavior and reducing substance abuse among these non-treatment seeking homeless substance-abusing MSMs receiving services at VNPD. We will also assess the impact of VBRT on other measures of therapeutic change consistent with a harm reduction approach, including reduction of psychiatric symptoms, decreased injection drug use and high-risk sexual behavior, increased participation in prevention programming, improvement in different domains of overall functioning (medical/social/vocational), and increased readiness to change. Additionally, we will examine whether baseline participant characteristics predict VBRT outcomes. Applying VBRT to non-treatment seeking homeless substance-abusing MSMs as well as integrating VBRT into a well-established prevention program with a harm reduction philosophy are both highly innovative. Our reinforcement contingencies will also shape behavioral steps towards more complex behaviors, employing a basic operant tenet that has not received sufficient attention. Overall, our proposed research has the potential to have a significant impact on the public health of the Los Angeles homeless, gay and bisexual community. If VBRT is efficacious for motivating non-treatment seeking homeless substance-abusing MSMs in a community-based prevention program to increase prosocial and healthy behaviors and decrease drug/alcohol use, established prevention programs may modify their approaches to include contingency management, and use it to address the staggering public health problems HGMSAs face on a daily basis.

Conditions

Substance-related Disorders

Keywords

Drug Abuse; Contingency management; Voucher-based Reinforcement Therapy; Homosexuality; Homeless Persons

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

Control

Control condition receiving minimal incentives for service program attendance and participation.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Contingency Management

Contingency management (Voucher-Based Reinforcement Therapy) intervention providing positive reinforcement for service program participation and attendance, enactment of prosocial/health behavior, and/or clean urine samples (i.e., no illicit drug use) and clean breathalyzer tests (i.e., BA \< 0.05).

Group Type: EXPERIMENTAL

Voucher-Based Reinforcement Therapy

Intervention Type: BEHAVIORAL

Participants were randomized into either the CM or control condition. Both conditions earned points for attendance and participation (max 364 points).

Participants in the CM condition also earned points for targeted health-promoting behaviors and for drug/alcohol abstinence. CM points for targeted health-promoting behaviors were not limited. Points for abstaining from substance use were awarded based on a Level 1 (recent abstinence for amphetamine, methamphetamine, PCP, and cocaine metabolites, as well as blood alcohol <0.05) urine sample.

Interventions

Voucher-Based Reinforcement Therapy

Participants were randomized into either the CM or control condition. Both conditions earned points for attendance and participation (max 364 points).

Participants in the CM condition also earned points for targeted health-promoting behaviors and for drug/alcohol abstinence. CM points for targeted health-promoting behaviors were not limited. Points for abstaining from substance use were awarded based on a Level 1 (recent abstinence for amphetamine, methamphetamine, PCP, and cocaine metabolites, as well as blood alcohol <0.05) urine sample.

Intervention Type: BEHAVIORAL

Other Intervention Names

VIPS

Eligibility Criteria

Inclusion Criteria

• Self-identified, non-treatment seeking, men who have sex with men (MSM) at least 18 years of age and eligible to participate in the VNPD Men's Program. To be eligible to participate in the VNPD Men's Program, a person must report that they have sex with men (or men and women) and actively use drugs or alcohol.
• DSM-IV diagnosis of substance dependence as determined by structured clinical interview for DSM-IV (SCID) on at least one of the following substances: alcohol, marijuana, methamphetamine, cocaine, crack, MDMA (ecstasy), opiates, or dissociative anesthetics (PCP, ketamine). These substances were chosen because they are the ones commonly used by individuals contacted by the VNPD's street outreach workers.
• Ability to understand and provide written informed consent. Also see section D6.1 for consent procedures used with vulnerable populations.
• Able to provide sufficient locator information for follow-up and/or known to VNPD outreach workers.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: No

Sponsors

National Institute on Drug Abuse (NIDA)

NIH

Sponsor Role: collaborator

Friends Research Institute, Inc.

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Cathy J Reback, Ph.D.

Role: PRINCIPAL_INVESTIGATOR

Friends Research Institute, Inc.

Jesse B Fletcher, Ph.D.

Role: STUDY_DIRECTOR

Friends Research Institute, Inc.

Locations

Friends Community Center

Los Angeles, California, United States

Countries

United States

References

Reback CJ, Peck JA, Dierst-Davies R, Nuno M, Kamien JB, Amass L. Contingency management among homeless, out-of-treatment men who have sex with men. J Subst Abuse Treat. 2010 Oct;39(3):255-63. doi: 10.1016/j.jsat.2010.06.007. Epub 2010 Jul 29.

Reference Type: RESULT

PMID: 20667681 (View on PubMed)

Reback CJ, Peck JA, Fletcher JB, Nuno M, Dierst-Davies R. Lifetime substance use and HIV sexual risk behaviors predict treatment response to contingency management among homeless, substance-dependent MSM. J Psychoactive Drugs. 2012 Apr-Jun;44(2):166-72. doi: 10.1080/02791072.2012.684633.

Reference Type: RESULT

PMID: 22880545 (View on PubMed)

Dierst-Davies R, Reback CJ, Peck JA, Nuno M, Kamien JB, Amass L. Delay-discounting among homeless, out-of-treatment, substance-dependent men who have sex with men. Am J Drug Alcohol Abuse. 2011 Mar;37(2):93-7. doi: 10.3109/00952990.2010.540278. Epub 2010 Dec 6.

Reference Type: RESULT

PMID: 21128876 (View on PubMed)

Fletcher JB, Reback CJ. Mental health disorders among homeless, substance-dependent men who have sex with men. Drug Alcohol Rev. 2017 Jul;36(4):555-559. doi: 10.1111/dar.12446. Epub 2016 Aug 12.

Reference Type: DERIVED

PMID: 27516073 (View on PubMed)

Other Identifiers

R01DA015990

Identifier Type: NIH

Identifier Source: secondary_id

View Link

NIDA 015990

Identifier Type: -

Identifier Source: org_study_id