Social and Monetary Incentives for Smoking Cessation at Large Employers (SMILE)

University of California (UC), Berkeley

Status: Completed

Conditions: Tobacco Use Disorder

Treatments: Behavioral: Deposits; Behavioral: Large Individual Bonus; Behavioral: Team Bonus; Behavioral: Small Individual Bonus; Behavioral: Teammate; Behavioral: Usual Care

Study type: Interventional

Funder types: Other; NIH

Identifiers

NCT02421224

5R01DA035384 (U.S. NIH Grant/Contract)

UCaliforniaBerkeley

Details and patient eligibility

About

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.

Enrollment: 4,190 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Single Group Assignment

Masking: Single Blind

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4,190 participants in 9 patient groups

Usual Care

Active Comparator group

Description:

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.

Treatment:

Behavioral: Usual Care

Deposits

Experimental group

Description:

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.

Treatment:

Behavioral: Usual Care

Behavioral: Deposits

Small Individual Bonus

Experimental group

Description:

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.

Treatment:

Behavioral: Usual Care

Behavioral: Small Individual Bonus

Large Individual Bonus

Experimental group

Description:

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.

Treatment:

Behavioral: Usual Care

Behavioral: Large Individual Bonus

Team Bonus

Experimental group

Description:

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.

Treatment:

Behavioral: Usual Care

Behavioral: Team Bonus

Behavioral: Teammate

Deposits plus Small Individual Bonus

Experimental group

Description:

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.

Treatment:

Behavioral: Usual Care

Behavioral: Deposits

Behavioral: Small Individual Bonus

Deposits plus Large Individual Bonus

Experimental group

Description:

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.

Treatment:

Behavioral: Usual Care

Behavioral: Deposits

Behavioral: Large Individual Bonus

Deposits plus Teammate

Experimental group

Description:

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.

Treatment:

Behavioral: Usual Care

Behavioral: Deposits

Behavioral: Teammate

Deposits plus Team Bonus

Experimental group

Description:

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.

Treatment:

Behavioral: Usual Care

Behavioral: Deposits

Behavioral: Team Bonus

Behavioral: Teammate