Internet-based Group Contingency Management to Promote Smoking Abstinence

Study Overview
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Brief Summary
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The purpose of the study is to develop and test an Internet-based group contingency management program designed to promote smoking cessation.

Official Title
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Internet-based Group Contingency Management to Promote Smoking Abstinence

Conditions
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Cigarette Smoking

Intervention / Treatment
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* Behavioral: Full Group Contingency
* Behavioral: Mixed Group Contingency


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: self-reported smoker ability to use the Internet permission to contact applicant by phone Exclusion Criteria: self-report of a history of or current severe or unstable medical or psychiatric illness that would interfere with the study inability to avoid high levels of ambient CO (e.g., occupational exposure; lives with a another smoker who smokes in the home)

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 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: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Full Group Contingency<br>This group (n = 20) will earn vouchers based only on team (n = 4) performance. Only if all members of the team submit a negative sample (CO ≤ 4 ppm), will they each earn a voucher. | Behavioral: Full Group Contingency<br>* This group (n = 20) will earn vouchers based only on team (n = 4) performance. Only if all members of the team submit a negative sample (CO ≤ 4 ppm), will they each earn a voucher.<br>|
| Experimental: Mixed Group Contingency<br>This group (n = 20) will earn vouchers based on both individual and team (n = 4) performance. If an individual submits a negative sample (CO ≤ 4 ppm), s/he will earn a voucher. Additionally, bonus vouchers will be earned if all team members submit negative samples. | Behavioral: Mixed Group Contingency<br>* This group (n = 20) will earn vouchers based on both individual and team (n = 4) performance. If an individual submits a negative sample (CO ≤ 4 ppm), s/he will earn a voucher. Additionally, bonus vouchers will be earned if all team members submit negative samples.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Breath CO | Twice daily breath CO samples obtained during baseline and treatment | 8 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Point prevalence measure of abstinence | Abstinence will be defined as: (a) CO sample ≤ 4 ppm; (b) cotinine < 50 ng/ml; and (c) reporting not smoking, not even a puff in the last 7 days. | at the end of treatment (approximately week 4) and at 3 month follow-up | 
| Duration of abstinence during treatment. | The longest duration of sustained abstinence (CO ≤ 4 ppm) based on the twice-daily breath samples during the treatment period. | 3 weeks | 
| Rate of social exchanges | The number of comments posted on the discussion forum during treatment. | 3 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Cigarette, Smoking, Nicotine, Contingency Management, Voucher Reinforcement, Smoking Abstinence, Internet, Internet-based Treatment, Group Contingencies