Trial Outcomes & Findings for Social and Monetary Incentives for Smoking Cessation at Large Employers (NCT NCT02421224)

Results Overview

7-day point prevalence of abstinence measured 12 months after enrollment using self-reported abstinence and urine cotinine test results

Recruitment status

COMPLETED

Study phase

NA

Target enrollment

4190 participants

Primary outcome timeframe

12 months after enrollment

Results posted on

2020-12-30

Participant Flow

Unit of analysis: Worksites

Participant milestones

Participant milestones
Measure	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.	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.	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.	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.	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.	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.	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.	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.	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.
Overall Study STARTED	444 12	397 11	508 11	482 11	495 11	515 11	489 11	364 11	496 12
Overall Study COMPLETED	442 12	394 11	507 11	479 11	491 11	513 11	489 11	362 11	495 12
Overall Study NOT COMPLETED	2 0	3 0	1 0	3 0	4 0	2 0	0 0	2 0	1 0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

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.

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure	Usual Care n=444 Participants 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.	Deposits n=397 Participants 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.	Small Individual Bonus n=508 Participants 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.	Large Individual Bonus n=482 Participants 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.	Team Bonus n=495 Participants 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.	Deposits Plus Small Individual Bonus n=515 Participants 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.	Deposits Plus Large Individual Bonus n=489 Participants 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.	Deposits Plus Teammate n=364 Participants 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.	Deposits Plus Team Bonus n=496 Participants 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.	Total n=4190 Participants Total of all reporting groups
Age, Continuous	32 years n=442 Participants • 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.	32 years n=394 Participants • 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.	31 years n=507 Participants • 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.	33 years n=479 Participants • 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.	30 years n=491 Participants • 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.	34 years n=513 Participants • 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.	31 years n=489 Participants • 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.	35 years n=362 Participants • 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.	32 years n=495 Participants • 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.	32 years n=4172 Participants • 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.
Sex: Female, Male Female	3 Participants n=442 Participants • 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.	18 Participants n=394 Participants • 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.	20 Participants n=507 Participants • 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.	4 Participants n=479 Participants • 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.	2 Participants n=491 Participants • 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.	10 Participants n=513 Participants • 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.	25 Participants n=489 Participants • 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.	15 Participants n=362 Participants • 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.	9 Participants n=495 Participants • 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.	106 Participants n=4172 Participants • 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.
Sex: Female, Male Male	439 Participants n=442 Participants • 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.	376 Participants n=394 Participants • 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.	487 Participants n=507 Participants • 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.	475 Participants n=479 Participants • 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.	489 Participants n=491 Participants • 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.	503 Participants n=513 Participants • 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.	464 Participants n=489 Participants • 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.	347 Participants n=362 Participants • 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.	486 Participants n=495 Participants • 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.	4066 Participants n=4172 Participants • 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.
Race and Ethnicity Not Collected	—	—	—	—	—	—	—	—	—	0 Participants Race and Ethnicity were not collected from any participant.
Region of Enrollment Thailand	444 participants n=444 Participants	397 participants n=397 Participants	508 participants n=508 Participants	482 participants n=482 Participants	495 participants n=495 Participants	515 participants n=515 Participants	489 participants n=489 Participants	364 participants n=364 Participants	496 participants n=496 Participants	4190 participants n=4190 Participants

PRIMARY outcome

Timeframe: 12 months after enrollment

7-day point prevalence of abstinence measured 12 months after enrollment using self-reported abstinence and urine cotinine test results

Outcome measures

Outcome measures
Measure	Usual Care n=442 Participants 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.	Deposits n=394 Participants 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.	Small Individual Bonus n=507 Participants 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.	Large Individual Bonus n=479 Participants 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.	Team Bonus n=491 Participants 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.	Deposits Plus Small Individual Bonus n=513 Participants 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.	Deposits Plus Large Individual Bonus n=489 Participants 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.	Deposits Plus Teammate n=362 Participants 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.	Deposits Plus Team Bonus n=495 Participants 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.
Proportion of Participants With Smoking Abstinence at 12 Months	42 Participants	57 Participants	74 Participants	104 Participants	60 Participants	72 Participants	91 Participants	49 Participants	67 Participants

SECONDARY outcome

Timeframe: 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

Outcome measures

Outcome measures
Measure	Usual Care n=442 Participants 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.	Deposits n=394 Participants 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.	Small Individual Bonus n=507 Participants 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.	Large Individual Bonus n=479 Participants 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.	Team Bonus n=491 Participants 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.	Deposits Plus Small Individual Bonus n=513 Participants 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.	Deposits Plus Large Individual Bonus n=489 Participants 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.	Deposits Plus Teammate n=362 Participants 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.	Deposits Plus Team Bonus n=495 Participants 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.
Proportion of Participants With Smoking Abstinence at 3 Months	40 Participants	61 Participants	64 Participants	88 Participants	56 Participants	66 Participants	89 Participants	38 Participants	73 Participants

SECONDARY outcome

Timeframe: At 0 months (at enrollment)

Proportion of eligible smokers who consent to participate in the main intervention

Outcome measures

Outcome measures
Measure	Usual Care n=442 Participants 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.	Deposits n=394 Participants 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.	Small Individual Bonus n=507 Participants 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.	Large Individual Bonus n=479 Participants 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.	Team Bonus n=491 Participants 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.	Deposits Plus Small Individual Bonus n=513 Participants 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.	Deposits Plus Large Individual Bonus n=489 Participants 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.	Deposits Plus Teammate n=362 Participants 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.	Deposits Plus Team Bonus n=495 Participants 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.
Program Acceptance	271 Participants	202 Participants	345 Participants	290 Participants	293 Participants	270 Participants	279 Participants	173 Participants	328 Participants

SECONDARY outcome

Timeframe: 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

Outcome measures

Outcome measures
Measure	Usual Care n=442 Participants 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.	Deposits n=394 Participants 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.	Small Individual Bonus n=507 Participants 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.	Large Individual Bonus n=479 Participants 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.	Team Bonus n=491 Participants 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.	Deposits Plus Small Individual Bonus n=513 Participants 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.	Deposits Plus Large Individual Bonus n=489 Participants 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.	Deposits Plus Teammate n=362 Participants 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.	Deposits Plus Team Bonus n=495 Participants 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.
Proportion of Participants With Smoking Abstinence at 6 Months	48 Participants	54 Participants	62 Participants	104 Participants	52 Participants	67 Participants	106 Participants	48 Participants	72 Participants

Adverse Events

Additional Information

Dr. Justin S. White

University of California, San Francisco

Phone: 415-476-8045

Email: [email protected]

Results disclosure agreements

Principal investigator is a sponsor employee
Publication restrictions are in place