Increasing Contingency Management Success in Smoking Cessation

Study Overview
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Brief Summary
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Incentives can be used to facilitate the acquisition of many healthy behaviors, such as smoking cessation. However, there is much room for improvement in the use of incentives. This study investigates how two aspects of providing incentives influence the effectiveness of using incentives to promote smoking cessation. One aspect is the criterion for providing incentives, e.g., whether to require smoking cessation before providing an incentive or to provide incentives following smoking reductions. The other aspect being investigated is whether it is best to use a fixed incentive amount or an amount that increases with continued cessation success.

Official Title
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Increasing Contingency Management Success Using Shaping

Conditions
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Smoking

Intervention / Treatment
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* Behavioral: Contingency Management


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Daily Smokers smoking a pack or more of cigarettes a day who are able to report to the study site each work day for about 5 minutes for around 3 months. Subjects must also have a breath CO level indicative of smoking at this level, and most report smoking for at least two years. Subjects must intend on quitting smoking. - Exclusion Criteria: Participation in another study by this group within the past year. Inability to give informed consent. Incapable of attendance each workday during the morning hours. -

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: 1<br>Shaping intervention for hard-to-treat smokers | Behavioral: Contingency Management<br>* incentives are available for reduced smoking on each study visit which occur each weekday.<br>|
| Active Comparator: 2<br>fixed criterion intervention for hard-to-treat smokers | Behavioral: Contingency Management<br>* incentives are available for reduced smoking on each study visit which occur each weekday.<br>|
| Other: 3<br>Non contingent incentives available to hard to treat smokers | Behavioral: Contingency Management<br>* incentives are available for reduced smoking on each study visit which occur each weekday.<br>|
| Experimental: 4<br>Ascending incentives values used in Smokers with Early Success | Behavioral: Contingency Management<br>* incentives are available for reduced smoking on each study visit which occur each weekday.<br>|
| Active Comparator: 5<br>fixed value incentives are used in Smokers with Early Success | Behavioral: Contingency Management<br>* incentives are available for reduced smoking on each study visit which occur each weekday.<br>|
| Other: 6<br>Non contingent incentives are available to Smokers with Early Success | Behavioral: Contingency Management<br>* incentives are available for reduced smoking on each study visit which occur each weekday.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Breath Carbon Monoxide Levels Indicating Smoking Abstinence During the Study, i.e., the Number of Breath Samples With Carbon Monoxide (CO) Levels Less Than 3 Parts Per Million (Ppm) |  | daily for breath CO | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Average Number Cigarettes Reported Smoked Each Day in the Past Week Measured at Follow-up Six Months After Entry Into the Study | average number cigarettes reported smoked each day in the past week at follow up six months after study entry | past week at follow-up six months after study entry |