Trial results for individualized incentives for alcohol in individuals with severe mental illness, including Bipolar Disorder, were posted on 2025-08-11. The study assessed the efficacy of two contingency management interventions for treating heavy drinking, with all groups showing similar proportions of urine EtG negative, ranging from 0.61 to 0.66.
Background
Individuals with serious mental illnesses such as Bipolar Disorder, Schizophrenia, and Major Depressive Disorder often face co-occurring conditions like Alcohol Dependence. Addressing heavy drinking in this population is critical for overall health and treatment adherence. Contingency management (CM) interventions are behavioral therapies that provide incentives for desired behaviors, such as abstinence from alcohol. This trial aimed to evaluate the effectiveness of different CM approaches in a community mental health center setting.
Trial design
This completed trial, identified as Phase NA, enrolled 392 participants. The study focused on individuals diagnosed with Schizophrenia, Bipolar Disorder, Major Depressive Disorder, and Alcohol Dependence who demonstrated heavy drinking. Participants were randomized to receive one of three treatment conditions: Usual CM, High-Magnitude CM, or Shaping CM. The primary outcome measured was Alcohol Use Assessed by Ethyl Glucuronide (EtG) Detection in Urine, specifically the proportion of urine samples negative for EtG.
Key results
The key measurements for alcohol use, assessed by Ethyl Glucuronide (EtG) detection in urine, showed the following proportions of uEtG negative:
- For the Usual CM group, the mean proportion of uEtG negative was 0.66 (Standard Deviation 0.25).
- For the High-Magnitude CM group, the mean proportion of uEtG negative was 0.65 (Standard Deviation 0.26).
- For the Shaping CM group, the mean proportion of uEtG negative was 0.61 (Standard Deviation 0.28).
What this means
The results indicate that the two specific contingency management interventions, High-Magnitude CM and Shaping CM, yielded similar outcomes in terms of the proportion of urine EtG negative compared to the Usual CM approach. The observed mean proportions of uEtG negative were very close across all three groups. This suggests that, based on this specific measure, these individualized incentive strategies did not demonstrate a clear advantage over usual contingency management for reducing alcohol use in individuals with serious mental illness and alcohol dependence. Further research or analysis may be needed to understand potential nuances or specific populations that might benefit differently.
Source
The information for these trial results was obtained from ClinicalTrials.gov, a public database of clinical studies. The results for the study NCT03481049, titled "Individualizing Incentives for Alcohol in the Severely Mentally Ill", were posted on 2025-08-11 on clinicaltrials.gov.