Individualizing Incentives for Alcohol in the Severely Mentally Ill

Study Results

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

392 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-05-05

Study Completion Date

2024-11-22

Brief Summary

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The investigators will evaluate the efficacy of a 2 various contingency management (CM) interventions (High-Magnitude CM, Shaping CM) for treating heavy drinking among individuals with serious mental illness and alcohol dependence who are seen within the context of a community mental health center setting. Participants will be 400 adults diagnosed with serious mental illness and alcohol dependence and those who demonstrate heavy drinking during the first 4 weeks will be randomized to receive treatment conditions.

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Detailed Description

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The objective of this study is to determine whether modifications to a CM intervention improve outcomes and reduce costs in heavy drinkers with serious mental illness using alcohol biomarker ethyl glucuronide (EtG) to test of alcohol abstinence. In CM, patients receive tangible rewards for demonstrating drug abstinence.

The investigators propose to examine whether 2 strategies - 1. Increasing reinforcer magnitude (High-Magnitude CM) or 2. Reinforcing light drinking before reinforcing abstinence (Shaping CM) - can improve outcomes in heavy drinkers with serious mental illness. The investigators will compare the efficacy of these 2 approaches to Usual CM in heavy drinkers with serious mental illness.

A total of 400 participants receiving treatment as usual at 2 treatment agencies will take part in a 4-week induction period. Participants (n=240) who attain a mean EtG \> 349 ng/mL (heavy drinking) during the induction period will be randomized to either a) 4 months of standard-magnitude CM for submitting alcohol-abstinent EtG samples (EtG \< 150 ng/mL) (Usual CM), b) 4 months of high-magnitude CM for submitting alcohol-abstinent EtG samples (High-Magnitude CM), or c) 1 month of CM for submitting alcohol samples that indicate light drinking (EtG \< 500 ng/mL), followed by 3 months of CM for submitting alcohol-abstinent EtG samples (Shaping CM). The primary outcome will be EtG-verified alcohol abstinence during the last 3 months of treatment (when all reinforcement is contingent on abstinence) and during 12 months of follow-up.

The investigators will also examine group differences in secondary outcomes, conduct a comprehensive economic analysis, and determine whether variables that make up the NIAAA Addictions Neuroclinical Assessment (ANA) model moderate alcohol abstinence.

Conditions

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Schizophrenia Bipolar Disorder Major Depressive Disorder Alcohol Dependence

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Usual CM

Participants will earn at least 3 prize draws each time they submit an alcohol negative urine samples during weeks 5-20, plus treatment as usual

Group Type EXPERIMENTAL