Social and Monetary Incentives for Smoking Cessation at Large Employers
SMILE
2 other identifiers
interventional
4,190
1 country
1
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.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for not_applicable
Started Apr 2015
Typical duration for not_applicable
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
April 1, 2015
CompletedFirst Submitted
Initial submission to the registry
April 15, 2015
CompletedFirst Posted
Study publicly available on registry
April 20, 2015
CompletedPrimary Completion
Last participant's last visit for primary outcome
August 1, 2017
CompletedStudy Completion
Last participant's last visit for all outcomes
August 1, 2017
CompletedResults Posted
Study results publicly available
November 18, 2020
CompletedDecember 30, 2020
December 1, 2020
2.3 years
April 15, 2015
October 26, 2020
December 3, 2020
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Proportion of Participants With Smoking Abstinence at 12 Months
7-day point prevalence of abstinence measured 12 months after enrollment using self-reported abstinence and urine cotinine test results
12 months after enrollment
Secondary Outcomes (3)
Proportion of Participants With Smoking Abstinence at 3 Months
3 months after enrollment
Program Acceptance
At 0 months (at enrollment)
Proportion of Participants With Smoking Abstinence at 6 Months
6 months after enrollment
Study Arms (9)
Usual Care
ACTIVE COMPARATORParticipants 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.
Deposits
EXPERIMENTALSame 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
EXPERIMENTALSame 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.
Large Individual Bonus
EXPERIMENTALSame 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.
Team Bonus
EXPERIMENTALSame 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
EXPERIMENTALSame 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 Large Individual Bonus
EXPERIMENTALSame 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
EXPERIMENTALSame 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
EXPERIMENTALSame 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.
Interventions
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.
Participants will have to deposit a certain amount of their own money at enrollment. Participants will be able to make additional voluntary deposits above the minimum amount during the intervention period. 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.
Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test.
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.
Each participant will be randomly assigned one teammate to provide social support during the quit attempt. Each participant will be assigned to a participating coworker who speaks the same primary language and works the same work shift as the participant.
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.
Eligibility Criteria
You may qualify if:
- 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
You may not qualify if:
- Expects to leave company within the next 12 months
- Is currently pregnant
- Are unable to provide informed consent
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- University of California, Berkeleylead
- National Institutes of Health (NIH)collaborator
- National Institute on Drug Abuse (NIDA)collaborator
- Mahidol Universitycollaborator
Study Sites (1)
Mahidol University
Bangkok, Thailand
Related Publications (1)
White JS, Lowenstein C, Srivirojana N, Jampaklay A, Dow WH. Incentive programmes for smoking cessation: cluster randomized trial in workplaces in Thailand. BMJ. 2020 Oct 14;371:m3797. doi: 10.1136/bmj.m3797.
PMID: 33055176RESULT
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Results Point of Contact
- Title
- Dr. Justin S. White
- Organization
- University of California, San Francisco
Study Officials
- PRINCIPAL INVESTIGATOR
William H. Dow, PhD
University of California, Berkeley
Publication Agreements
- PI is Sponsor Employee
- No
- Restrictive Agreement
- No
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- SINGLE
- Who Masked
- OUTCOMES ASSESSOR
- Purpose
- TREATMENT
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
April 15, 2015
First Posted
April 20, 2015
Study Start
April 1, 2015
Primary Completion
August 1, 2017
Study Completion
August 1, 2017
Last Updated
December 30, 2020
Results First Posted
November 18, 2020
Record last verified: 2020-12