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| ID | Type | Description | Link |
|---|---|---|---|
| 5R01DA035384 | U.S. NIH Grant/Contract | View source |
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| Name | Class |
|---|---|
| National Institutes of Health (NIH) | NIH |
| National Institute on Drug Abuse (NIDA) | NIH |
| Mahidol University | OTHER |
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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Usual Care | Active Comparator | 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. |
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| Deposits | Experimental | 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. |
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| Small Individual Bonus | Experimental | 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. |
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| Large Individual Bonus | Experimental | 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. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Usual Care | Behavioral | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| 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 |
| Measure | Description | Time Frame |
|---|---|---|
| Proportion of Participants With Smoking Abstinence at 3 Months | 7-day point prevalence of abstinence measured 3 months after enrollment based on self-reported abstinence and urine cotinine test results | 3 months after enrollment |
| Program Acceptance |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| William H. Dow, PhD | University of California, Berkeley | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Mahidol University | Bangkok | Thailand |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 33055176 | Result | 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. |
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| ID | Title | Description |
|---|---|---|
| FG000 | 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. 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. |
| FG001 | 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. 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. Deposits: 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. |
| FG002 | 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. 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. Small Individual Bonus: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. |
| FG003 | 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. 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: 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. |
| FG004 | 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. 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. Teammate: 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. Team Bonus: 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. |
| FG005 | Deposits Plus 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. 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. Deposits: 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. Small Individual Bonus: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. |
| FG006 | Deposits Plus 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. 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. Deposits: 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. Large Individual Bonus: 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. |
| FG007 | Deposits Plus 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. 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. Deposits: 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. Teammate: 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. |
| FG008 | Deposits Plus 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. 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. Deposits: 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 test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine test. Teammate: 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. Team Bonus: If the participant and assigned teammate both quit smoking at 3 mos., 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. |
| Title | Milestones | Reasons Not Completed | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
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| ID | Title | Description |
|---|---|---|
| BG000 | 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. 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. |
| Units | Counts |
|---|---|
| Participants |
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| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Number analyzed includes those in the primary analysis, dropping those who died before the primary endpoint and those who were missing at least one covariate in the regression analyses. |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | 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 | Posted | Count of Participants | Participants | 12 months after enrollment |
|
12 months
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | 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. 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. |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Dr. Justin S. White | University of California, San Francisco | 415-476-8045 | justin.white@ucsf.edu |
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot_SAP | Yes | Yes | No | Study Protocol and Statistical Analysis Plan | Apr 29, 2019 | Oct 23, 2020 | Prot_SAP_000.pdf |
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| ID | Term |
|---|---|
| D014029 | Tobacco Use Disorder |
| D016540 | Smoking Cessation |
| D015438 | Health Behavior |
| D012907 | Smoking |
| ID | Term |
|---|---|
| D019966 | Substance-Related Disorders |
| D064419 | Chemically-Induced Disorders |
| D001523 | Mental Disorders |
| D001519 | Behavior |
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| Team Bonus | Experimental | 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. |
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| Deposits plus Small Individual Bonus | Experimental | 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. |
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| Deposits plus Large Individual Bonus | Experimental | 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. |
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| Deposits plus Teammate | Experimental | 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. |
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| Deposits plus Team Bonus | Experimental | 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. |
|
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| Deposits | Behavioral | 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. |
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| Small Individual Bonus | Behavioral | Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. |
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| Large Individual Bonus | Behavioral | 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. |
|
| Teammate | Behavioral | 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. |
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| Team Bonus | Behavioral | 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. |
|
Proportion of eligible smokers who consent to participate in the main intervention
| At 0 months (at enrollment) |
| Proportion of Participants With Smoking Abstinence at 6 Months | 7-day point prevalence of abstinence measured 6 months after enrollment based on self-reported abstinence and urine cotinine test results | 6 months after enrollment |
| BG001 | 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. 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. Deposits: 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. |
| BG002 | 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. 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. Small Individual Bonus: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. |
| BG003 | 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. 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: 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. |
| BG004 | 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. 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. Teammate: 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. Team Bonus: 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. |
| BG005 | Deposits Plus 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. 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. Deposits: 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. Small Individual Bonus: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. |
| BG006 | Deposits Plus 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. 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. Deposits: 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. Large Individual Bonus: 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. |
| BG007 | Deposits Plus 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. 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. Deposits: 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. Teammate: 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. |
| BG008 | Deposits Plus 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. 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. Deposits: 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 test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine test. Teammate: 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. Team Bonus: If the participant and assigned teammate both quit smoking at 3 months, as verified by a urine test, then each will receive a monetary bonus. The team bonus is equal in value to that in the Large Individual Bonus group. |
| BG009 | Total | Total of all reporting groups |
| Median |
| Inter-Quartile Range |
| years |
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| Sex: Female, Male | Number analyzed includes those in the primary analysis, dropping those who died before the primary endpoint and those who were missing at least one covariate in the regression analyses. | Count of Participants | Participants |
|
| Race and Ethnicity Not Collected | Race and Ethnicity were not collected from any participant. | Count of Participants | Participants |
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| Region of Enrollment | Number | participants |
|
| OG001 | 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. 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. Deposits: 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. |
| OG002 | 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. 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. Small Individual Bonus: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. |
| OG003 | 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. 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: 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. |
| OG004 | 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. 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. Teammate: 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. Team Bonus: 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. |
| OG005 | Deposits Plus 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. 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. Deposits: 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. Small Individual Bonus: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. |
| OG006 | Deposits Plus 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. 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. Deposits: 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. Large Individual Bonus: 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. |
| OG007 | Deposits Plus 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. 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. Deposits: 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. Teammate: 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. |
| OG008 | Deposits Plus 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. 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. Deposits: 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 test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine test. Teammate: 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. Team Bonus: If the participant and assigned teammate both quit smoking at 3 months, as verified by a urine test, then each will receive a monetary bonus. The team bonus is equal in value to that in the Large Individual Bonus group. |
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| Secondary | Proportion of Participants With Smoking Abstinence at 3 Months | 7-day point prevalence of abstinence measured 3 months after enrollment based on self-reported abstinence and urine cotinine test results | Posted | Count of Participants | Participants | 3 months after enrollment |
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| Secondary | Program Acceptance | Proportion of eligible smokers who consent to participate in the main intervention | Posted | Count of Participants | Participants | At 0 months (at enrollment) |
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| Secondary | Proportion of Participants With Smoking Abstinence at 6 Months | 7-day point prevalence of abstinence measured 6 months after enrollment based on self-reported abstinence and urine cotinine test results | Posted | Count of Participants | Participants | 6 months after enrollment |
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| 2 |
| 444 |
| 0 |
| 444 |
| 0 |
| 444 |
| EG001 | 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. Usual Care: Same as Usual Care only group. Deposits: 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. | 2 | 397 | 0 | 397 | 0 | 397 |
| EG002 | 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. Usual Care: Same as Usual Care only group. Small Individual Bonus: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. | 1 | 508 | 0 | 508 | 0 | 508 |
| EG003 | 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. Usual Care: Same as Usual Care only group. Large Individual Bonus: 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. | 2 | 482 | 0 | 482 | 0 | 482 |
| EG004 | 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. Usual Care: Same as Usual Care only group. Teammate: 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. Team Bonus: 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. | 0 | 495 | 0 | 495 | 0 | 495 |
| EG005 | Deposits Plus 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. Usual Care: Same as Usual Care only group. Deposits: 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. Small Individual Bonus: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. | 1 | 515 | 0 | 515 | 0 | 515 |
| EG006 | Deposits Plus 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. Usual Care: Same as Usual Care only group. Deposits: 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. Large Individual Bonus: 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. | 0 | 489 | 0 | 489 | 0 | 489 |
| EG007 | Deposits Plus 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. Usual Care: Same as Usual Care only group. Deposits: Same as Deposits only group. Teammate: 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. | 1 | 364 | 0 | 364 | 0 | 364 |
| EG008 | Deposits Plus 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. Usual Care: Same as Usual Care only group. Deposits: Same as Deposits only group. Teammate: 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. Team Bonus: 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. | 1 | 496 | 0 | 496 | 0 | 496 |
Not provided
Not provided
| Male |
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