Social and Monetary Incentives for Smoking Cessation at Large Employers
Not Applicable
Completed
- Conditions
- Tobacco Use Disorder
- Interventions
- Behavioral: Usual CareBehavioral: DepositsBehavioral: TeammateBehavioral: Large Individual BonusBehavioral: Small Individual BonusBehavioral: Team Bonus
- Registration Number
- NCT02421224
- Lead Sponsor
- University of California, Berkeley
- Brief Summary
The investigators will conduct a cluster randomized controlled trial of several behavioral interventions for smoking cessation among a sample of employees at large workplaces in the Bangkok metropolitan area. The study aims to test the impacts of different incentive structures for smoking cessation on take-up, effectiveness, and cost-effectiveness. The interventions are designed to elucidate certain principles from the field of behavioral economics.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 4190
Inclusion Criteria
- Current full-time employee of a participating company
- Smoker of 100+ cigarettes during lifetime
- Smoker of 10+ cigarettes per week
- Individual is aged 18+ years old
- Smoker wants to quit within the next 6 months
Exclusion Criteria
- Expects to leave company within the next 12 months
- Is currently pregnant
- Are unable to provide informed consent
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Deposits Deposits Same as Usual Care, plus participants will have to deposit a certain amount of their own money as an incentive to quit smoking. Participants will be able to make additional voluntary deposits above the minimum amount. The participant will be refunded all deposits if he quits smoking at 3 months, as verified by a urine cotinine test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine cotinine test. Team Bonus Usual Care Same as Usual Care, plus each participant will be randomly assigned one teammate to provide social support during the quit attempt. If the participant and assigned teammate both quit smoking at 3 months, as verified by a urine cotinine test, then each will receive a monetary bonus. The team bonus is equal in value to that in the Large Individual Bonus group. Deposits plus Small Individual Bonus Small Individual Bonus Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will follow the protocol for the monetary bonus as described for the Small Individual Bonus group. Deposits Usual Care Same as Usual Care, plus participants will have to deposit a certain amount of their own money as an incentive to quit smoking. Participants will be able to make additional voluntary deposits above the minimum amount. The participant will be refunded all deposits if he quits smoking at 3 months, as verified by a urine cotinine test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine cotinine test. Small Individual Bonus Small Individual Bonus Same as Usual Care, plus each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. Deposits plus Small Individual Bonus Deposits Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will follow the protocol for the monetary bonus as described for the Small Individual Bonus group. Small Individual Bonus Usual Care Same as Usual Care, plus each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. Team Bonus Teammate Same as Usual Care, plus each participant will be randomly assigned one teammate to provide social support during the quit attempt. If the participant and assigned teammate both quit smoking at 3 months, as verified by a urine cotinine test, then each will receive a monetary bonus. The team bonus is equal in value to that in the Large Individual Bonus group. Team Bonus Team Bonus Same as Usual Care, plus each participant will be randomly assigned one teammate to provide social support during the quit attempt. If the participant and assigned teammate both quit smoking at 3 months, as verified by a urine cotinine test, then each will receive a monetary bonus. The team bonus is equal in value to that in the Large Individual Bonus group. Deposits plus Large Individual Bonus Usual Care Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will follow the protocol for the monetary bonus as described for the Large Individual Bonus group. Usual Care Usual Care Participants will receive in-person group counseling from a trained smoking cessation counselor. Participants will learn about reasons to quit smoking, strategies for quitting smoking, and additional resources available to support the quit attempt. Participants will also complete a quit plan. Large Individual Bonus Usual Care Same as Usual Care, plus each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. The bonus is twice the value of that in the Small Individual Bonus group. Large Individual Bonus Large Individual Bonus Same as Usual Care, plus each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. The bonus is twice the value of that in the Small Individual Bonus group. Deposits plus Large Individual Bonus Deposits Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will follow the protocol for the monetary bonus as described for the Large Individual Bonus group. Deposits plus Teammate Deposits Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will be randomly assigned one other participant to serve as a teammate who provides social support during the quit attempt. Deposits plus Small Individual Bonus Usual Care Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will follow the protocol for the monetary bonus as described for the Small Individual Bonus group. Deposits plus Teammate Usual Care Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will be randomly assigned one other participant to serve as a teammate who provides social support during the quit attempt. Deposits plus Team Bonus Deposits Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group, will be randomly assigned a teammate, and will follow the protocol for the monetary bonus as described for the Team Bonus group. Deposits plus Team Bonus Team Bonus Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group, will be randomly assigned a teammate, and will follow the protocol for the monetary bonus as described for the Team Bonus group. Deposits plus Large Individual Bonus Large Individual Bonus Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will follow the protocol for the monetary bonus as described for the Large Individual Bonus group. Deposits plus Team Bonus Usual Care Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group, will be randomly assigned a teammate, and will follow the protocol for the monetary bonus as described for the Team Bonus group. Deposits plus Team Bonus Teammate Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group, will be randomly assigned a teammate, and will follow the protocol for the monetary bonus as described for the Team Bonus group. Deposits plus Teammate Teammate Same as Usual Care, plus the participant will follow the protocol for deposits as described for the Deposits group and will be randomly assigned one other participant to serve as a teammate who provides social support during the quit attempt.
- Primary Outcome Measures
Name Time Method Proportion of Participants With Smoking Abstinence at 12 Months 12 months after enrollment 7-day point prevalence of abstinence measured 12 months after enrollment using self-reported abstinence and urine cotinine test results
- Secondary Outcome Measures
Name Time Method Proportion of Participants With Smoking Abstinence at 3 Months 3 months after enrollment 7-day point prevalence of abstinence measured 3 months after enrollment based on self-reported abstinence and urine cotinine test results
Proportion of Participants With Smoking Abstinence at 6 Months 6 months after enrollment 7-day point prevalence of abstinence measured 6 months after enrollment based on self-reported abstinence and urine cotinine test results
Program Acceptance At 0 months (at enrollment) Proportion of eligible smokers who consent to participate in the main intervention
Trial Locations
- Locations (1)
Mahidol University
🇹ðŸ‡Bangkok, Thailand