Contingency Management for Smoking Cessation Among Veterans With Psychotic Disorders

Study Overview
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Brief Summary
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This study examines the use of contingent incentives to increase attendance at smoking cessation treatment sessions by smokers with schizophrenia and other psychoses who want to quit smoking. We hypothesize that participants randomized to receive contingent rewards for group attendance will attend more treatment sessions than those in the control group.

Detailed Description
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Schizophrenia and other psychotic disorders are highly prevalent in the VA population and are associated with high rates of smoking. Although smoking cessations approaches that work for non-schizophrenic patients such as behavioral counseling and medications appear to be efficacious for schizophrenic smokers, a major obstacle in providing adequate treatment is poor attendance at treatment sessions. Contingency management has been shown to shape treatment behavior in non-schizophrenic smokers and to shape other behaviors such as cocaine use and exercise in schizophrenics. The intention of this project is to examine the use of contingent incentives to increase attendance at smoking cessation treatment sessions by smokers with schizophrenia and other psychoses and to compare two different approaches to providing contingent incentives in this context. Subjects in the experimental condition draw from a fishbowl to obtain tokens when they attend a smoking cessation treatment session. The number of draws will be based upon attendance at consecutive sessions. Subjects in the experimental condition receive a set reward that will not change regardless of attendance at consecutive sessions. We hypothesize that the participants in the experimental condition will attend more smoking cessation group therapy sessions than those in the control condition because they will have the possibility, although not the likelihood, to obtain contingent reinforcement of greater value.

Official Title
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Contingency Management for Smoking Cessation Among Veterans With Schizophrenia or Other Psychoses

Conditions
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Nicotine Dependence, Psychotic Disorders

Intervention / Treatment
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* Behavioral: Contingency Management
* Behavioral: Reward


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: All subjects must be diagnosed with schizophrenia or any other psychotic disorder, bipolar disorder with psychotic features, or major depression with psychotic features according to the electronic medical record. Current nicotine use, defined as smoking 5 or more cigarettes/day for at least 16 of the past 30 days prior to study screening. Prospective subjects must indicate willingness to attend smoking cessation group therapy. Exclusion Criteria: Imminent risk for suicide or violence. Severe psychiatric symptoms or psychosocial instability likely to prevent participation in the study protocol (i.e., attendance at scheduled sessions, ability to read study materials, and/or ability to comprehend interventions). Clinically apparent, gross cognitive impairment.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Arm 1<br>Experimental | Behavioral: Contingency Management<br>* Participants draw from a fishbowl to obtain tokens when they attend a smoking cessation treatment session. The number of draws will be based upon attendance at consecutive sessions. Tokens include messages of encouragement (Good job!) or VA canteen vouchers of varying monetary value.<br>|
| Active Comparator: Arm 2<br>Active Comparator | Behavioral: Reward<br>* Participants receive set reward (VA canteen voucher) for each week of smoking cessation treatment they attend. The value of the reward will not change regardless of attendance at consecutive sessions.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of treatment sessions attended |  | 11 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Reduction in cigarettes per day |  | 3 and 6 months | 
| 7- and 30-day point prevalence abstinence |  | 3 and 6 months | 
| Continuous abstinence from quit date |  | 3 and 6 months | 
| Days to relapse from quit date |  | Up to 6 months | 
| Change in BPRS scores |  | 3 and 6 months | 
| Change in PHQ-9 scores |  | 3 and 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Contingency management, Smoking cessation, Psychotic disorders, Veterans