- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT07649018
Gen AI Powered Behavioral Support Plus Chewing Gum Intervention for Construction Workers Who Smoke: A Pragmatic, Pilot, Cluster Randomized Controlled Trial
Build to Quit 「築建無煙」: Gen AI Powered Behavioral Support Plus Chewing Gum Intervention for Construction Workers Who Smoke: A Pragmatic, Pilot, Cluster Randomized Controlled Trial
The goal of this pilot trial is to learn if 1-week NRT sampling, 3-week chewing gum, and 12-week chatbot-delivered instant messaging support works to help smoking cessation in construction workers who smoke. It will also learn about the feasibility, acceptability, and preliminary effectiveness of delivering the comprehensive intervention in construction settings. The main questions it aims to answer are:
- Will the integrated intervention, comprising NRT sampling, chewing gum, and chatbot-delivered instant messaging support, show feasibility, acceptability, and appropriateness for delivery in construction worksite settings?
- Will participants who receive the comprehensive intervention have a higher validated abstinence rate than those who receive NRT sampling alone?
Researchers will compare the integrated intervention, comprising NRT sampling, chewing gum, and chatbot-delivered instant messaging support, to the standard care group (NRT sampling alone) to see if the integrated intervention works to promote smoking cessation.
Participants in the intervention group will receive:
- AWARD advice and brief video
- 1-week NRT sampling
- 3-week chewing gum
- 12-week chatbot-based instant messaging support (via WhatsApp)
Studienübersicht
Status
Bedingungen
Intervention / Behandlung
- Verhalten: Selbsthilfe-Broschüre zur Raucherentwöhnung
- Verhalten: Preisverleihung
- Verhalten: Überweisungskarte
- Verhalten: Brief leaflet on health warning and smoking cessation
- Arzneimittel: 1-week nicotine gum
- Verhalten: 3-week chewing gum
- Verhalten: 12-week chatbot-based instant messaging support
- Verhalten: Brief video
Detaillierte Beschreibung
Hong Kong has achieved a sustained reduction in daily cigarette smoking, from 23.3% in the early 1980s to 8.5% in 2025. However, the current prevalence remains above the Government's Towards 2025 target of 7.8%, indicating the need for continued and targeted cessation efforts. The construction industry represents a particularly important setting for intervention, as recent legislative amendments to designate construction sites as no-smoking areas have further strengthened the policy basis for promoting smoke-free worksites.
Construction workers (CWs) are a high-priority population for smoking cessation because they have consistently higher smoking prevalence than many other occupational groups and the general population. In Hong Kong, a workplace health study found that 45% of construction workers were daily smokers, nearly twice the prevalence among office clerks/professionals. For CWs, smoking may compound existing occupational health risks by increasing susceptibility to respiratory and cardiovascular diseases in a physically demanding and dust-exposed work environment.
This study proposes a comprehensive worksite-targeted smoking cessation intervention model for CWs who smoke in Hong Kong, integrating NRT sampling, chewing gum support, and chatbot-delivered instant messaging. NRT is an evidence-based pharmacotherapy for reducing nicotine withdrawal symptoms and supporting smoking abstinence, and has been widely used in community-based cessation interventions. For CWs, short-term NRT sampling may provide immediate access to evidence-based pharmacological support, reduce early withdrawal symptoms, and lower the initial barrier to treatment uptake in a worksite setting. Chewing gum may complement NRT sampling by serving as a low-cost behavioral substitute for smoking, particularly by replacing the hand-to-mouth and oral routines associated with cigarette use. Chatbot-delivered instant messaging support can further extend the intervention beyond the worksite by providing 24/7 support, reminders for NRT and chewing gum use, and real-time assistance during cravings or high-risk smoking situations.
Studientyp
Einschreibung (Geschätzt)
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
- Name: Man Ping Wang, PhD
- Telefonnummer: +852 3917 6636
- E-Mail: mpwang@hku.hk
Studieren Sie die Kontaktsicherung
- Name: Mengyao Li, Mphil
- Telefonnummer: +852 6851 8462
- E-Mail: lmy0814@connect.hku.hk
Studienorte
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Hong Kong
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Hong Kong, Hong Kong, Hongkong, 999077
- Hong Kong Council on Smoking and Health (COSH)
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Kontakt:
- Fung Wong
- Telefonnummer: +852 2180 5186
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Unterermittler:
- Tai Hing Lam, MD
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Unterermittler:
- Tzu Tsun Luk, PhD
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Unterermittler:
- Xiaoyun Xie, MPH
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Unterermittler:
- Mengyao Li, Mphil
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Unterermittler:
- Ziqiu Guo, PhD
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Unterermittler:
- Yilan Wu, Mphil
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Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Beschreibung
Inclusion Criteria:
- Hong Kong residents aged 18 or above
- Smoke at least one cigarette per day in the preceding 3-month
- Able to communicate in Cantonese (including reading and writing Chinese)
- Saliva cotinine 30 ng/ml or above
- Intent to quit / reduce smoking
- Have instant messaging tool (WhatsApp) installed
- Able to use instant messaging tool (e.g., WhatsApp) for communication.
Exclusion Criteria:
- Smokers who are participating in other smoking cessation programmes
- Smokers who are using any smoking cessation medication
- Smokers who are presenting with the following oral diseases, including recent oral surgery or tooth extraction, unstable dentures, significant tooth mobility or advanced periodontal disease, temporomandibular pain or dysfunction, or painful oral mucosal lesions
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Versorgungsforschung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Single
Waffen und Interventionen
Teilnehmergruppe / Arm |
Intervention / Behandlung |
|---|---|
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Experimental: Interventionsgruppe
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Zu den Inhalten gehören Informationen über die Vorteile des Aufhörens, Rauchen und Krankheiten, Methoden zum Aufhören, Umgang mit Entzugserscheinungen, Erklärung zum Aufhören usw.
Zu den Ratschlägen gehören nach der Raucherhistorie, warnen Sie vor dem hohen Risiko, raten Sie, die Raucher auf Raucherentwöhnungsdienste (mit einer Überweisungskarte) zu verweisen und dies erneut zu tun.
Der Inhalt besteht aus kurzen Informationen und einem Highlight bestehender Raucherentwöhnungsdienste, Kontaktmethoden, Motivationsinformationen und starken unterstützenden Nachrichten oder Slogans.
The contents of the leaflet include (1) highlights of the absolute risk of death due to smoking; (2) the whole list of diseases caused by active and secondhand smoking; (3) ten horrible pictorial warnings of health consequences of smoking and second-hand smoking in one page to maximize the impacts; (4) benefits of SC and (5) simple messages to encourage participants to quit smoking.
Participants in both group will receive a 1-week supply of free nicotine gum (2 mg or 4 mg).
The dosage of nicotine gum will be guided by participants' daily cigarette consumption, in accordance with recommendations from the Department of Health.
Research assistants will explain the benefits of NRT for smoking cessation, provide instructions on the correct use of nicotine gum, encourage participants to continue using nicotine gum after completing the free sample where appropriate, and advise participants to reduce smoking or make a quit attempt when using NRT.
Participants in the intervention group will receive 6 packs of chewing gum at baseline (2 packs per week).
Chewing gum will be presented as a practical strategy to replace the hand-to-mouth and oral routines associated with smoking, particularly during work breaks, after meals, in other smoking-related situations at construction sites, or when participants are unwilling to use nicotine gum.
Participants in the intervention group will receive 12 weeks of instant messaging support delivered by the LLM-based chatbot accessible via WhatsApp platform.
The chatbot, powered by Claude model (or more advanced model available) using prompt-engineering and agent-based techniques, will deliver theory-based and structured intervention alongside freeform, on-demand support.
The structured intervention session deploys the 5As model (Ask, Advise, Assess, Assist, and Arrange follow-up) and 5Rs model (Relevance, Risks, Rewards, Roadblocks, Repetition), as used in our previous telephone-counselling trials and recommended by WHO for brief SC intervention.
Participants in both groups will receive a brief motivational video (15-second) via WhatsApp.
The video will feature a construction worker who successfully quit smoking in our previous trial, providing a relatable peer role model for participants.
The video will welcome participants to the programme, encourage them to make a quit attempt, and promote early use of nicotine gum as a practical strategy for managing cravings and supporting smoking cessation.
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Aktiver Komparator: Kontrollgruppe
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Zu den Inhalten gehören Informationen über die Vorteile des Aufhörens, Rauchen und Krankheiten, Methoden zum Aufhören, Umgang mit Entzugserscheinungen, Erklärung zum Aufhören usw.
Zu den Ratschlägen gehören nach der Raucherhistorie, warnen Sie vor dem hohen Risiko, raten Sie, die Raucher auf Raucherentwöhnungsdienste (mit einer Überweisungskarte) zu verweisen und dies erneut zu tun.
Der Inhalt besteht aus kurzen Informationen und einem Highlight bestehender Raucherentwöhnungsdienste, Kontaktmethoden, Motivationsinformationen und starken unterstützenden Nachrichten oder Slogans.
The contents of the leaflet include (1) highlights of the absolute risk of death due to smoking; (2) the whole list of diseases caused by active and secondhand smoking; (3) ten horrible pictorial warnings of health consequences of smoking and second-hand smoking in one page to maximize the impacts; (4) benefits of SC and (5) simple messages to encourage participants to quit smoking.
Participants in both group will receive a 1-week supply of free nicotine gum (2 mg or 4 mg).
The dosage of nicotine gum will be guided by participants' daily cigarette consumption, in accordance with recommendations from the Department of Health.
Research assistants will explain the benefits of NRT for smoking cessation, provide instructions on the correct use of nicotine gum, encourage participants to continue using nicotine gum after completing the free sample where appropriate, and advise participants to reduce smoking or make a quit attempt when using NRT.
Participants in both groups will receive a brief motivational video (15-second) via WhatsApp.
The video will feature a construction worker who successfully quit smoking in our previous trial, providing a relatable peer role model for participants.
The video will welcome participants to the programme, encourage them to make a quit attempt, and promote early use of nicotine gum as a practical strategy for managing cravings and supporting smoking cessation.
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Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Biochemisch validierte Abstinenz
Zeitfenster: 6-Monats-Follow-up
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Definiert als ausgeatmeter CO-Gehalt <4 ppm und Speichel-Cotinin-Gehalt ≤30 ng/ml
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6-Monats-Follow-up
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Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Biochemisch validierte Abstinenz
Zeitfenster: 3-Monats-Follow-up
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Definiert als ausgeatmeter CO-Gehalt <4 ppm und Speichel-Cotinin-Gehalt ≤30 ng/ml
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3-Monats-Follow-up
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Selbst gemeldete 7-Tage-Punktprävalenzabstinenz
Zeitfenster: 3- und 6-Monats-Follow-ups
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Raucher, die in den 7 Tagen vor der Follow-up nicht einmal einen Puff rauchten
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3- und 6-Monats-Follow-ups
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Selbst berichtete Reduktion
Zeitfenster: 1-, 2-, 3- und 6-Monats-Follow-ups
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Definiert durch mindestens 50% Reduzierung der täglichen Anzahl der Zigaretten
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1-, 2-, 3- und 6-Monats-Follow-ups
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Selbst gemeldete Verwendung des Raucherentwöhnungsdienstes
Zeitfenster: 1-, 2-, 3- und 6-Monats-Follow-ups
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Verwendung des Raucherentwöhnungsdienstes bei 1-, 2-, 3- und 6-Monats-Follow-ups.
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1-, 2-, 3- und 6-Monats-Follow-ups
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Family well-being
Zeitfenster: 3- and 6-month follow-ups
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Family well-being will be assessed using the 3H scale, which measures perceived family health, happiness, and harmony on a 0-10 scale.
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3- and 6-month follow-ups
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Perceived family happiness
Zeitfenster: 3- and 6-month follow-ups
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Perceived family happiness will be measured using a single-item self-reported family happiness scale ranging from 0 to 10.
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3- and 6-month follow-ups
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Andere Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Recruitment rate
Zeitfenster: Baseline
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Defined as the number of participants divided by the number of eligible smokers
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Baseline
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Retention rate
Zeitfenster: 1-, 2-, 3- and 6-month follow-ups
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Defined as the number of participants who completed the follow-up divided by the number of participants
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1-, 2-, 3- and 6-month follow-ups
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Chatbot usability
Zeitfenster: 3-month follow-up
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Chatbot usability will be evaluated using the 11-item Bot Usability Scale (BUS), which assesses perceived effectiveness, efficiency, and satisfaction.
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3-month follow-up
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Acceptability of NRT sampling
Zeitfenster: 1-, 2-, 3- and 6-month follow-ups
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Acceptability of NRT sampling will be assessed through 4 brief items (score range from 0 to10) on perceived usefulness for craving relief, perceived side effects, willingness to continue using NRT after the free sample, and overall satisfaction with the NRT gum.
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1-, 2-, 3- and 6-month follow-ups
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Acceptability of chewing gum
Zeitfenster: 1-, 2-, 3- and 6-month follow-ups
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Acceptability of chewing gum will be assessed through 3 brief items (score range from 0 to 10) on perceived usefulness for behavioral substitution, perceived fit with construction worksite routines, and willingness to continue using chewing gum as a cessation aid.
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1-, 2-, 3- and 6-month follow-ups
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Self-reported adverse events
Zeitfenster: 1-, 2-, 3- and 6-month follow-ups
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Self-reported adverse events related to nicotine gum and chewing gum will be assessed using a binary question: "Have you experienced any adverse events when using nicotine gum or chewing gum?"
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1-, 2-, 3- and 6-month follow-ups
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Mitarbeiter und Ermittler
Sponsor
Ermittler
- Hauptermittler: Man Ping Wang, PhD, The University of Hong Kong
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Primärer Abschluss (Geschätzt)
Studienabschluss (Geschätzt)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
- Verhalten
- Gesundheitsverhalten
- Raucherentwöhnung
- Therapeutika
- Essen
- Ernährung, Nahrung und Ernährung
- Physiologische Phänomene
- Essen und Getränke
- Kohlenhydrate
- Polymere
- Makromolekulare Substanzen
- Polysaccharide
- Biologische Produkte
- Komplexe Gemische
- Biopolymere
- Pflanzengummis
- Pflanzenausstrahlung
- Süßigkeiten
- Tabakkonsumsteuergeräte
- Kaugummi
- Kaugummi Nikotin
Andere Studien-ID-Nummern
- Build to Quit
Plan für individuelle Teilnehmerdaten (IPD)
Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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