SmokingNCT01311115
Using Group Commitment for Smoking Cessation
A study testing Group commitment contract and Smoking cessation education and counseling in people with Smoking, run by University of California, Berkeley at 1 site in Thailand.
Trial summary
This study proposes a novel behavioral intervention to help smokers in Thailand to achieve their goals of quitting. Smoking treatment programs are rare throughout most of Asia and unlikely to meet the impending demand for quitting that tobacco control regulations is stimulating. New approaches are needed. Read more about this study
- Who is it for?
- Ages 20 years and older
- Conditions the study is for
- Smoking
- What is being tested?
- Group commitment contract and Smoking cessation education and counseling
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 201 participants
- Where
- 1 siteThailand
- Study dates
- Nov 2010to Mar 2012
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Current smoker of at least 10 cigarettes per week and at least 100 cigarettes over the course of a lifetime
- Residents of the study area in Nakhon Nayok province, which includes the six subdistricts of Klong Yai, Chumpon, Bueng San, Pak Phli, Khao Phoem, or Ongkharak
Who cannot join
- Pregnant
- Plans to leave the study area within the next 12 months
Trial locations and contacts
1 site in 1 country.
Thailand1 site
Srinakharinwirot University
Ongkharak, Changwat Nakhon Nayok, 26120
About this study
This study proposes a novel behavioral intervention to help smokers in Thailand to achieve their goals of quitting. Smoking treatment programs are rare throughout most of Asia and unlikely to meet the impending demand for quitting that tobacco control regulations is stimulating. New approaches are needed.
The present study is a randomized controlled trial to test the effectiveness of a novel, scalable approach to smoking cessation that is targeted toward rural Southeast Asian communities. Thailand is used as a test case to explore if pairs of smokers quit successfully after making financially-backed commitments and receiving cash incentives to quit. The control group receives education and counseling about quitting. In addition to education and counseling about quitting, the intervention includes two key components:
Read more
- Each participant is encouraged to deposit his "cigarette money" on a weekly basis, to be returned only if the smoker quits successfully within three months. Such commitment contracts, based on theory from behavioral economics, are designed to help a person to maintain self-control and motivation in the face of temptation.
- Each participant is paired with another study participant. If both quit, each receives a cash bonus. The joint incentives are designed to lead partners to support each other throughout the quit attempt.
Thus, group commitment contracts marshal a robust blend of elements: financial commitment, social support, peer pressure, and monetary rewards. A larger, follow-up evaluation will clarify the relative importance of each of these elements.
- Conditions
- Smoking
- Being tested
- Group commitment contract, Smoking cessation education and counseling
- Medical subject headings
- Smoking
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Group commitment contractBehavioural
Also called Commitment contract, Deposit contract, Contingency contract, Buddy intervention
- Each participant is required to deposit at least 50 baht at enrollment. A deposit collector visits each participant on a weekly basis and collects additional deposits on a voluntary basis. All deposits are returned only if the smoker quits successfully within three months.
- The project gives a matching contribution of 150 baht for the initial deposit of at least 50 baht. All participants in the treatment group are further randomized to a one-month group and a three-month group. The one-month group receives an additional 150 baht of project funds if they deposit 100 baht of their money within one month of enrollment. The three-month group receives 150 baht for depositing 100 baht within three months of enrollment.
- Each participant is paired with another study participant. If both quit, each receives a cash bonus of 1,200 baht. At enrollment, pairs receive brief counseling on ways to support each other during the quit attempt.
Smoking cessation education and counselingBehavioural
Also called Smoking cessation counseling
Participants receive educational pamphlets on reasons to quit smoking and strategies for quitting smoking. They also receive one-time, group counseling on quitting smoking from a nurse trained in smoking cessation counseling.
| Study group | Role | What they receive |
|---|---|---|
| Group commitment contracts | Experimental | In addition to education and counseling, the intervention includes the following components:
1. Each participant is encouraged to deposit his "cigarette money" on a weekly basis, to be returned only if the smoker quits successfully within three months.
2. The project gives a series of two matching contributions of 150 baht each to participants who meet certain deposit requirements.
3. Each participant is paired with another study participant. If both quit, each receives a cash bonus of 1,200 baht. At enrollment, pairs receive brief counseling on ways to support each other during the quit attempt. Receives: Behavioral: Group commitment contract; Behavioral: Smoking cessation education and counseling |
| Education and counseling | Active comparator | Participants in this group receive educational pamphlets about quitting smoking and one-time, group counseling from a nurse trained in smoking cessation counseling. Receives: Behavioral: Smoking cessation education and counseling |
What is being measured
The primary outcome is the main question the study is designed to answer.
Smoking Status at 6 Months
7-day point prevalence of smoking abstinence measured 6 months after enrollment, using a NicCheck urine cotinine test. Participants who self-report having smoked in the last 7 days, as part of the follow-up survey, are considered to be continuing smokers.
Measured: 6 months after enrollment
Secondary outcomes (4)
Concordance of Smoking Status Between Partners at 6 Months
The concordance of smoking status among randomly assigned pairs: both abstain, both smoke, or one abstains and one smokes, measured using 7-day point-prevalence abstinence at 6 months after enrollment, measured using self-reported abstinence and urine cotinine testing. Participants in the control condition are assigned to a pair, but their partner's identity is never revealed during the study.
Measured: 6 months after enrollment
Smoking Status at 3 Months
7-day point prevalence of smoking abstinence measured 3 months after enrollment, using a NicCheck urine cotinine test. Participants who self-report having smoked in the last 7 days, as part of the follow-up survey, are considered to be continuing smokers.
Measured: 3 months after enrollment
Concordance of Smoking Status Between Partners at 3 Months
The concordance of smoking status among randomly assigned pairs: both abstain, both smoke, or one abstains and one smokes, measured using 7-day point-prevalence abstinence at 3 months after enrollment, measured using self-reported abstinence and urine cotinine testing. Participants in the control condition are assigned to a pair, but their partner's identity is never revealed during the study.
Measured: 3 months after enrollment
Smoking Status at 14 Months
7-day point prevalence of smoking abstinence measured 6 months after enrollment, using a NicCheck urine cotinine test. Participants who self-report having smoked in the last 7 days, as part of the follow-up survey, are considered to be continuing smokers.
Measured: 14 months after enrollment
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Mar 2011 (estimated)
- Study startNov 2010
- Primary completionAug 2011
- Study completionMar 2012
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for SmokingStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 201 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of California, Berkeley
- Sponsor type
- University, hospital or other
- Collaborators
- National Institute on Aging (NIA), Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), Srinakharinwirot University
- Responsible party
- Principal investigator, William Dow, University of California, Berkeley
- Investigators
- Justin S White, MA, MSPH, Study director, University of California at BerkeleyWilliam H Dow, PhD, Principal investigator, University of California at BerkeleySuthat Rungruanghiranya, MD, Study director, Srinakharinwirot University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01311115
- Sponsor's protocol ID
- 2010-04-1269
- Other IDs
- 2P30AG012839-16, R21HD056581
- Status last verified
- Aug 2022
- First submitted
- 8 Mar 2011
- Last updated
- 15 Sep 2022
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
Publications
White JS, Dow WH, Rungruanghiranya S. Commitment contracts and team incentives: a randomized controlled trial for smoking cessation in Thailand. Am J Prev Med. 2013 Nov;45(5):533-42. doi: 10.1016/j.amepre.2013.06.020.
PubMed 24139765
Study at a glance
From the registry record, last updated by the sponsor on 15 Sep 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Using Group Commitment for Smoking Cessation
- ClinicalTrials.gov ID
- NCT01311115
- Acronym / sponsor ID
- 2010-04-1269
- Conditions
- Smoking
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 201 participants (actual)
- Lead sponsor
- University of California, BerkeleyUniversity, hospital or other
- Collaborators
- National Institute on Aging (NIA), Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), Srinakharinwirot University
- Study start
- Nov 2010
- Primary completion
- Aug 2011 (actual)
- Study completion
- Mar 2012 (actual)
- First posted
- 9 Mar 2011 (estimated)
- Results
- Posted 15 Sep 2022
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study proposes a novel behavioral intervention to help smokers in Thailand to achieve their goals of quitting. Smoking treatment programs are rare throughout most of Asia and unlikely to meet the impending demand for quitting that tobacco control regulations is stimulating. New approaches are needed.
The present study is a randomized controlled trial to test the effectiveness of a novel, scalable approach to smoking cessation that is targeted toward rural Southeast Asian communities. Thailand is used as a test case to explore if pairs of smokers quit successfully after making financially-backed commitments and receiving cash incentives to quit. The control group receives education and counseling about quitting. In addition to education and counseling about quitting, the intervention includes two key components:
- Each participant is encouraged to deposit his "cigarette money" on a weekly basis, to be returned only if the smoker quits successfully within three months. Such commitment contracts, based on theory from behavioral economics, are designed to help a person to maintain self-control and motivation in the face of temptation.
- Each participant is paired with another study participant. If both quit, each receives a cash bonus. The joint incentives are designed to lead partners to support each other throughout the quit attempt.
Thus, group commitment contracts marshal a robust blend of elements: financial commitment, social support, peer pressure, and monetary rewards. A larger, follow-up evaluation will clarify the relative importance of each of these elements.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Group commitment contracts | Experimental | Behavioral: Group commitment contract, Behavioral: Smoking cessation education and counselingIn addition to education and counseling, the intervention includes the following components: 1. Each participant is encouraged to deposit his "cigarette money" on a weekly basis, to be returned only if the smoker quits successfully within three months. 2. The project gives a series of two matching contributions of 150 baht each to participants who meet certain deposit requirements. 3. Each participant is paired with another study participant. If both quit, each receives a cash bonus of 1,200 baht. At enrollment, pairs receive brief counseling on ways to support each other during the quit attempt. |
| Education and counseling | Active comparator | Behavioral: Smoking cessation education and counselingParticipants in this group receive educational pamphlets about quitting smoking and one-time, group counseling from a nurse trained in smoking cessation counseling. |
Who may qualify
- Ages
- 20 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Current smoker of at least 10 cigarettes per week and at least 100 cigarettes over the course of a lifetime
- Residents of the study area in Nakhon Nayok province, which includes the six subdistricts of Klong Yai, Chumpon, Bueng San, Pak Phli, Khao Phoem, or Ongkharak
Key exclusion criteria (2 listed)
- Pregnant
- Plans to leave the study area within the next 12 months
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Group commitment contractAlso: Commitment contract, Deposit contract, Contingency contract, Buddy intervention1. Each participant is required to deposit at least 50 baht at enrollment. A deposit collector visits each participant on a weekly basis and collects additional deposits on a voluntary basis. All deposits are returned only if the smoker quits successfully within three months. 2. The project gives a matching contribution of 150 baht for the initial deposit of at least 50 baht. All participants in the treatment group are further randomized to a one-month group and a three-month group. The one-month group receives an additional 150 baht of project funds if they deposit 100 baht of their money within one month of enrollment. The three-month group receives 150 baht for depositing 100 baht within three months of enrollment. 3. Each participant is paired with another study participant. If both quit, each receives a cash bonus of 1,200 baht. At enrollment, pairs receive brief counseling on ways to support each other during the quit attempt. | Behavioural | Group commitment contracts |
| Smoking cessation education and counselingAlso: Smoking cessation counselingParticipants receive educational pamphlets on reasons to quit smoking and strategies for quitting smoking. They also receive one-time, group counseling on quitting smoking from a nurse trained in smoking cessation counseling. | Behavioural | Education and counseling, Group commitment contracts |
Primary outcome
Smoking Status at 6 Months
Time frame: 6 months after enrollment
7-day point prevalence of smoking abstinence measured 6 months after enrollment, using a NicCheck urine cotinine test. Participants who self-report having smoked in the last 7 days, as part of the follow-up survey, are considered to be continuing smokers.
4 secondary outcomes
Concordance of Smoking Status Between Partners at 6 Months
Time frame: 6 months after enrollment
Smoking Status at 3 Months
Time frame: 3 months after enrollment
Concordance of Smoking Status Between Partners at 3 Months
Time frame: 3 months after enrollment
Smoking Status at 14 Months
Time frame: 14 months after enrollment
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 15 Sep 2022.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Results publication: PubMed 24139765White JS, Dow WH, Rungruanghiranya S. Commitment contracts and team incentives: a randomized controlled trial for smoking cessation in Thailand. Am J Prev Med. 2013 Nov;45(5):533-42. doi: 10.1016/j.amepre.2013.06.020.
Related trials for Smoking
Enrolling by invitationObservational study
Using Smartwatches to Monitor Smoking in Real-life Situations
Smoking
Not yet recruiting
Comparing the Efficacy of a Conversational Agent (QuitBot) Versus Standard Health Education on Smoking Cessation Among Medical Students in Cairo University
Conversational Agent, Smoking Cessation
RecruitingObservational study
§SMOKE Nicotine and Tobacco Youth Cohort
Tobacco Use Behavior, Nicotine Dependence Tobacco Product
Active, not recruitingEarly Phase 1
Smoking Cessation Intervention During Low Dose CT (LDCT) Screening for Lung Cancer
Smoking Cessation
Not yet recruiting
C-Raven LDCT: Lung Cancer Screening Intervention
Lung Cancer Screening
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Justin S White, MA, MSPH study director
University of California at Berkeley
William H Dow, PhD principal investigator
University of California at Berkeley
Suthat Rungruanghiranya, MD study director
Srinakharinwirot University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Group commitment contract and Smoking cessation education and counseling in people with Smoking, run by University of California, Berkeley at 1 site in Thailand.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 15 Sep 2022. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Thailand. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 15 Sep 2022). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Smoking Status at 6 Months (time frame: 6 months after enrollment). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01311115, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Sep 2022.