Phase 3
Completed N=131
Voucher-Based Incentives in a Prevention Setting
Source: ClinicalTrials.gov NCT00607269 ↗Enrolled (actual)
131
Serious AEs
2.3%
Results posted
Aug 2013
Primary outcomePrimary: Amount ($) Earned for Targeted Prosocial and Healthy Behaviors — 16.21 $ Vouchers
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.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Amount ($) Earned for Targeted Prosocial and Healthy Behaviors |
16.21 | — |
| PRIMARY Proportion of Level 1 (i.e., Drug Negative Urines and Alcohol Negative Breath) Clean Urine Samples Provided at 12-month Follow-up, by Condition. |
0.36; 0.61 | — |
| SECONDARY Self-reported Psychiatric Symptoms at 12-month Follow-up. |
1.01; 0.60 | — |
| SECONDARY Self-reported Sexual Behaviors at 12-month Follow-up |
3.33; 0.70 | — |
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.
Exclusion Criteria: Psychiatric health issues requiring a higher level of care.
Data sourced from ClinicalTrials.gov (NCT00607269). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.