Trial reportAddiction science & clinical practice2025
Implementation of contingency management with women engaging in polysubstance use.
Trial report in Addiction science & clinical practice, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05192434 (Efficacy of a Trauma Intervention for Affect Regulation, Adherence, and Substance Use to Optimize PrEP for Women Who Inject Drugs), which is not on this map. Not yet cited in PubMed.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Efficacy of a Trauma Intervention for Affect Regulation, Adherence, and Substance Use to Optimize PrEP for Women Who Inject Drugs
Who cites it
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Corrections and comments
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Authors and funding
11 authors.
Funding
Abstract
backgroundContingency management (CM) is an effective intervention that provides financial incentives as positive reinforcement for reducing opioid or stimulant use. However, it has not been tested in populations of women who inject drugs (WWID) engaging in polysubstance use.
methodsWe aimed to compare the feasibility of two CM protocols designed to encourage illicit stimulant and opioid abstinence among WWID participating in an ongoing HIV prevention trial. Participants completed a 3-month CM period during which they submitted thrice weekly urine toxicology screenings (UTOX). In the 'abstinence from stimulants and opioids' protocol, participants received a $5 USD incentive when metabolites of stimulants and opioids were not detected in urine. In the 'partial-abstinence protocol', they received a $5 USD incentive when metabolites of stimulants or opioids were not detected, thus doubling the potential incentive obtained each visit. Women also received scaling bonuses after three consecutive negative UTOX ($5-$15 USD). We used descriptive statistics to summarize the total number of (1) UTOXs completed and (2) bonuses distributed. Rates of engagement per person per month were calculated (i.e., total number of completed UTOX/3 months*24 participants). Rates of engagement were compared by CM protocol period.
resultsParticipants were primarily White women (67%) with an average age of 47 years. Self-reported polysubstance use was common (96%) with women reporting injecting an average of 5 times daily (Interquartile Range: 2-7). Participants (N = 24) collectively submitted 177 UTOX during their 3-month CM periods. Rates of non-reactive UTOX results were slightly higher in the partial-abstinence protocol compared to the abstinence from stimulants and opioids protocol (2.9 per month versus 1.0 per month). More bonuses were earned in the partial-abstinence protocol (0.50 bonuses per participant per month) compared to the abstinence from stimulants and opioids protocol (none). There were no study related adverse events in either protocol group during the CM period.
conclusionsFindings demonstrate the feasibility of a CM protocol that provided financial incentives for partial abstinence, periods with documented stimulant or opioid abstinence, as well as abstinence to both, without the occurrence of iatrogenic effects. Future research focusing on CM protocols with more flexible incentive structures remains critical.
trial registrationNCT05192434.
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