Smoking Cessation InterventionNCT02188433
Promoting Smoking Cessation in the Community Via QTW 2014
A study testing Quit immediately (QI) / cut down to quit (CDTQ) in people with Smoking Cessation Intervention, run by The University of Hong Kong at 1 site in China.
Trial summary
Although smoking prevalence is decreasing in Hong Kong, there are still 645,000 daily smokers 10.7% ( Thematic Household Survey 2012) and half will be killed by smoking (Lam ,2012) which accounts for over 7,000 deaths per year (Lam, Ho, Hedley, Mak, \& Peto, 2001). Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Smoking Cessation Intervention
- What is being tested?
- Quit immediately (QI) / cut down to quit (CDTQ)
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 1,307 participants
- Where
- 1 siteChina
- Study dates
- May 2014to Oct 2016
- Phase
- Interventional
- Are there results?
- None posted in the registry
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 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Hong Kong residents aged 18 or above
- Smoke at least 1 cigarette per day in the past 3 months
- Able to communicate in Cantonese
- Exhaled carbon monoxide (CO) of 4 ppm or above, assessed by a validated CO smokerlyzer
- Have Intention to quit
Who cannot join
- Smokers who have difficulties (either physical or cognitive condition) to communicate
- Currently following other smoking cessation programs
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Building Capacity and Promoting Smoking Cessation in the Community Via Quit to Win Contest 2014: a Randomized Controlled Trial
Although smoking prevalence is decreasing in Hong Kong, there are still 645,000 daily smokers 10.7% ( Thematic Household Survey 2012) and half will be killed by smoking (Lam ,2012) which accounts for over 7,000 deaths per year (Lam, Ho, Hedley, Mak, \& Peto, 2001). Smoking also accounts for a large amount of medical cost, long-term care and productivity loss of US$688 million (0.6% Hong Kong GDP) (McGhee et al., 2006) (Census \& Statistics Department (Hong Kong Special Administrative Region government), 2001). Smoking is a highly addictive behavior and it is difficult for smokers with strong nicotine dependence to quit without assistance. On the other hand, reaching and helping the many smokers who have no intention to quit is a challenge, because they are unlikely to seek professional help from smoking cessation services. The Quit and Win programme provides an opportunity to reach and encourage a large group of smokers to make quit attempt and maintain abstinence. The Quit and Win model posits that smokers participating in the contest will have higher motivation to quit with incentives and better social support (Cahill \& Petera, 2011). Studies have found that such quitting contests or incentive programs appeared to reach a large number of smokers and demonstrated a significantly higher quit rate for the quit and win group than for the control group (Cahill \& Rafael, 2008).
The Quit to Win Contest in 2014 and the study's interventions using cut down to quit approach are theoretically based on the Health Action Process Approach ( HAPA) for the intervention group (Schwarzer, 2008). The HAPA suggests that one's intention of behavior change can be fostered by knowing that the new behavior has positive outcomes as opposed to the negative outcomes that accompany the current behavior; and planning (action planning and coping planning) which serves as an operative mediator between intentions and behavior. Using gradual cut down approach on smoking cessation will probably increase smoker's self-efficacy on smoking cessation as the process could be achieved at the smoker's own perceived pace without placing too much pressure on themselves but with greater control of self in the cessation process. This was supported by the evidence that smoking reduction approach led to a greater self-efficacy to resist smoking and increased subsequent quitting (Broms, Korhonen, \& Kaprio, 2008). Most importantly, reducing cigarette consumption will lower the nicotine dependence which is associated with later abstinence (Hughes et al., 2004). On the other hand, quitting immediately will have a less sense of control and may be subjected to relapse thus lower the self-efficacy on quitting.
Therefore, the present study will examine (1) effectiveness of the cut down to quit (CDTQ) and quit immediately (QI) approaches; (2) explore the use of Community-Based Participatory Research (CBPR) model to build capacity and to engage community partners in taking on this important public health issue for sustainability in the community. In addition, process evaluation will be conducted to assess the effectiveness of the recruitment activity and how it is linked with the overall program outcomes.
- Conditions
- Smoking Cessation Intervention
- Being tested
- Quit immediately (QI) / cut down to quit (CDTQ)
- Keywords
- Effectiveness of quit immediately (QI) and cut down to quit (CDTQ) interventions in achieving smoking abstinence
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Quit immediately (QI) / cut down to quit (CDTQ)Behavioural
Use quit immediately (QI) or cut down to quit (CDTQ) interventions to achieve smoking abstinence
| Study group | Role | What they receive |
|---|---|---|
| Cut down to quit (CDTQ) | Experimental | For those subjects who claim that they cannot quit smoking ≤7 days, they will receive a leaflet (i.e. include a roadmap of smoking reduction strategy) plus a brief intervention using the AWARD model: (a) Ask about smoking history, (b) Warn about the high risk, (c) Advise to quit as quitting can greatly reduce risks, and participants will be advised to cut down cigarette consumption at their own pace, but the process should not exceed 3 months. (d) Refer smokers to a smoking cessation clinic, and (e) Do it again: repeat the intervention and encourage smokers who fail to quit or relapse to reduce again during each telephone follow-up.
For the subjects have intention to quit smoking ≤7 days, the investigator will follow-up them after a week. For those who report quitted, they will be followed up as other participants. However, if they report failed to quit, they will receive the same interventions and will be followed-up as other participants in the experimental group. Receives: Behavioral: Quit immediately (QI) / cut down to quit (CDTQ) |
| Quit Immediately (QI) | Active comparator | QI group subjects will receive a smoking cessation booklet (provided by COSH) plus brief intervention using AWARD model similar to CDTQ group. For the subsequent telephone follow-up repeat the health warning that 'one in two smokers will be killed by smoking' and encourage smokers who fail to quit or relapse to try again. Receives: Behavioral: Quit immediately (QI) / cut down to quit (CDTQ) |
What is being measured
The primary outcome is the main question the study is designed to answer.
smoking quit rate
The primary outcomes are self-reported 7-day point prevalence (pp) quit rate at 3 and 6 months among the two groups
Measured: 3-, 6- and 12-month follow-up
Secondary outcomes (4)
Biochemical validated quit rate
biochemically validated quit rates at 3 and 6 months in the two groups
Measured: 3-, 6- and 12-month follow-up
Smoking reduction rate
rate of smoking reduction by at least half of baseline amount in the two groups
Measured: 3-, 6- and 12-month follow-up
Smoking quit attempt
number of quit attempts at 3 and 6 months among the two groups
Measured: 3-, 6- and 12-month follow-up
quit rate and reduction rate for all subjects
the above cessation and reduction outcomes of all subjects participating in Quit to Win contest 2014
Measured: 3-, 6- and 12-month follow-up
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Jul 2014 (estimated)
- Study startMay 2014
- Primary completionJul 2016
- Study completionOct 2016
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Smoking Cessation InterventionStudies of the same condition, open and under way.
- More trials run by The University of Hong KongThe sponsor's other registered studies.
- 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
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 1,307 participants (actual)
Sponsor and investigators
- Lead sponsor
- The University of Hong Kong
- Sponsor type
- University, hospital or other
- Collaborators
- Hong Kong Council on Smoking and Health
- Responsible party
- Sponsor
- Investigators
- Man Ping Kelvin Wang, PhD, Principal investigator, The University of Hong Kong
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02188433
- Sponsor's protocol ID
- QTW2014
- Status last verified
- Nov 2016
- First submitted
- 10 Jul 2014
- Last updated
- 18 Nov 2016
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Zeng Y, Wu YS, Luk TT, Zhao SZ, Guo Z, Li Y, Tong HSC, Lai VWY, Cheung YTD, Lam TH, Wang MP. Quitting trajectories of Hong Kong Chinese smokers receiving behavioral smoking cessation interventions: A post hoc analysis of eight randomized controlled trials. Addiction. 2026 Jun;121(6):1568-1579. doi: 10.1111/add.70328. Epub 2026 Jan 17.
PubMed 41546550
Study at a glance
From the registry record, last updated by the sponsor on 18 Nov 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Building Capacity and Promoting Smoking Cessation in the Community Via Quit to Win Contest 2014: a Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT02188433
- Acronym / sponsor ID
- QTW2014
- Conditions
- Smoking Cessation Intervention
- Keywords
- Effectiveness of quit immediately (QI) and cut down to quit (CDTQ) interventions in achieving smoking abstinence
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 1,307 participants (actual)
- Lead sponsor
- The University of Hong KongUniversity, hospital or other
- Collaborators
- Hong Kong Council on Smoking and Health
- Study start
- May 2014
- Primary completion
- Jul 2016 (actual)
- Study completion
- Oct 2016 (actual)
- First posted
- 11 Jul 2014 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Although smoking prevalence is decreasing in Hong Kong, there are still 645,000 daily smokers 10.7% ( Thematic Household Survey 2012) and half will be killed by smoking (Lam ,2012) which accounts for over 7,000 deaths per year (Lam, Ho, Hedley, Mak, \& Peto, 2001). Smoking also accounts for a large amount of medical cost, long-term care and productivity loss of US$688 million (0.6% Hong Kong GDP) (McGhee et al., 2006) (Census \& Statistics Department (Hong Kong Special Administrative Region government), 2001). Smoking is a highly addictive behavior and it is difficult for smokers with strong nicotine dependence to quit without assistance. On the other hand, reaching and helping the many smokers who have no intention to quit is a challenge, because they are unlikely to seek professional help from smoking cessation services. The Quit and Win programme provides an opportunity to reach and encourage a large group of smokers to make quit attempt and maintain abstinence. The Quit and Win model posits that smokers participating in the contest will have higher motivation to quit with incentives and better social support (Cahill \& Petera, 2011). Studies have found that such quitting contests or incentive programs appeared to reach a large number of smokers and demonstrated a significantly higher quit rate for the quit and win group than for the control group (Cahill \& Rafael, 2008).
The Quit to Win Contest in 2014 and the study's interventions using cut down to quit approach are theoretically based on the Health Action Process Approach ( HAPA) for the intervention group (Schwarzer, 2008). The HAPA suggests that one's intention of behavior change can be fostered by knowing that the new behavior has positive outcomes as opposed to the negative outcomes that accompany the current behavior; and planning (action planning and coping planning) which serves as an operative mediator between intentions and behavior. Using gradual cut down approach on smoking cessation will probably increase smoker's self-efficacy on smoking cessation as the process could be achieved at the smoker's own perceived pace without placing too much pressure on themselves but with greater control of self in the cessation process. This was supported by the evidence that smoking reduction approach led to a greater self-efficacy to resist smoking and increased subsequent quitting (Broms, Korhonen, \& Kaprio, 2008). Most importantly, reducing cigarette consumption will lower the nicotine dependence which is associated with later abstinence (Hughes et al., 2004). On the other hand, quitting immediately will have a less sense of control and may be subjected to relapse thus lower the self-efficacy on quitting.
Therefore, the present study will examine (1) effectiveness of the cut down to quit (CDTQ) and quit immediately (QI) approaches; (2) explore the use of Community-Based Participatory Research (CBPR) model to build capacity and to engage community partners in taking on this important public health issue for sustainability in the community. In addition, process evaluation will be conducted to assess the effectiveness of the recruitment activity and how it is linked with the overall program outcomes.
Study design
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Cut down to quit (CDTQ) | Experimental | Behavioral: Quit immediately (QI) / cut down to quit (CDTQ)For those subjects who claim that they cannot quit smoking ≤7 days, they will receive a leaflet (i.e. include a roadmap of smoking reduction strategy) plus a brief intervention using the AWARD model: (a) Ask about smoking history, (b) Warn about the high risk, (c) Advise to quit as quitting can greatly reduce risks, and participants will be advised to cut down cigarette consumption at their own pace, but the process should not exceed 3 months. (d) Refer smokers to a smoking cessation clinic, and (e) Do it again: repeat the intervention and encourage smokers who fail to quit or relapse to reduce again during each telephone follow-up. For the subjects have intention to quit smoking ≤7 days, the investigator will follow-up them after a week. For those who report quitted, they will be followed up as other participants. However, if they report failed to quit, they will receive the same interventions and will be followed-up as other participants in the experimental group. |
| Quit Immediately (QI) | Active comparator | Behavioral: Quit immediately (QI) / cut down to quit (CDTQ)QI group subjects will receive a smoking cessation booklet (provided by COSH) plus brief intervention using AWARD model similar to CDTQ group. For the subsequent telephone follow-up repeat the health warning that 'one in two smokers will be killed by smoking' and encourage smokers who fail to quit or relapse to try again. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Hong Kong residents aged 18 or above
- Smoke at least 1 cigarette per day in the past 3 months
- Able to communicate in Cantonese
- Exhaled carbon monoxide (CO) of 4 ppm or above, assessed by a validated CO smokerlyzer
- Have Intention to quit
Key exclusion criteria (2 listed)
- Smokers who have difficulties (either physical or cognitive condition) to communicate
- Currently following other smoking cessation programs
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 |
|---|---|---|
| Quit immediately (QI) / cut down to quit (CDTQ)Use quit immediately (QI) or cut down to quit (CDTQ) interventions to achieve smoking abstinence | Behavioural | Cut down to quit (CDTQ), Quit Immediately (QI) |
Primary outcome
smoking quit rate
Time frame: 3-, 6- and 12-month follow-up
The primary outcomes are self-reported 7-day point prevalence (pp) quit rate at 3 and 6 months among the two groups
4 secondary outcomes
Biochemical validated quit rate
Time frame: 3-, 6- and 12-month follow-up
Smoking reduction rate
Time frame: 3-, 6- and 12-month follow-up
Smoking quit attempt
Time frame: 3-, 6- and 12-month follow-up
quit rate and reduction rate for all subjects
Time frame: 3-, 6- and 12-month follow-up
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 18 Nov 2016.
- Derived from this study: PubMed 41546550Zeng Y, Wu YS, Luk TT, Zhao SZ, Guo Z, Li Y, Tong HSC, Lai VWY, Cheung YTD, Lam TH, Wang MP. Quitting trajectories of Hong Kong Chinese smokers receiving behavioral smoking cessation interventions: A post hoc analysis of eight randomized controlled trials. Addiction. 2026 Jun;121(6):1568-1579. doi: 10.1111/add.70328. Epub 2026 Jan 17.
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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.
Man Ping Kelvin Wang, PhD principal investigator
The University of Hong Kong
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Quit immediately (QI) / cut down to quit (CDTQ) in people with Smoking Cessation Intervention, run by The University of Hong Kong at 1 site in China.
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 5 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 18 Nov 2016. 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 China. 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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
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 quit rate (time frame: 3-, 6- and 12-month follow-up). 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 NCT02188433, 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 18 Nov 2016.