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- Ensaio Clínico NCT07649018
Gen AI Powered Behavioral Support Plus Chewing Gum Intervention for Construction Workers Who Smoke
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)
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
- Comportamental: Cartilha de autoajuda para parar de fumar
- Comportamental: Conselho de prêmios
- Comportamental: Cartão de referência
- Comportamental: Brief leaflet on health warning and smoking cessation
- Medicamento: 1-week nicotine gum
- Comportamental: 3-week chewing gum
- Comportamental: 12-week chatbot-based instant messaging support
- Comportamental: Brief video
Descrição detalhada
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.
Tipo de estudo
Inscrição (Estimado)
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
- Nome: Man Ping Wang, PhD
- Número de telefone: +852 3917 6636
- E-mail: mpwang@hku.hk
Estude backup de contato
- Nome: Mengyao Li, Mphil
- Número de telefone: +852 6851 8462
- E-mail: lmy0814@connect.hku.hk
Locais de estudo
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Hong Kong
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Hong Kong, Hong Kong, Hong Kong, 999077
- Hong Kong Council on Smoking and Health (COSH)
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Contato:
- Fung Wong
- Número de telefone: +852 2180 5186
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Subinvestigador:
- Tai Hing Lam, MD
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Subinvestigador:
- Tzu Tsun Luk, PhD
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Subinvestigador:
- Xiaoyun Xie, MPH
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Subinvestigador:
- Mengyao Li, Mphil
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Subinvestigador:
- Ziqiu Guo, PhD
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Subinvestigador:
- Yilan Wu, Mphil
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
- Adulto mais velho
Aceita Voluntários Saudáveis
Descrição
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
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Pesquisa de serviços de saúde
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Solteiro
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
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Experimental: Grupo de intervenção
|
O conteúdo inclui informações sobre os benefícios de parar de fumar, tabagismo e doenças, métodos para parar, como lidar com os sintomas de abstinência, declaração de abandono, etc.
Os conselhos de prêmios incluem perguntar sobre o histórico de fumantes, avisar sobre o alto risco, aconselhar para desistir, consulte os fumantes para os serviços de cessação de fumar (com um cartão de referência) e fazê -lo novamente.
O conteúdo consiste em informações breves e um destaque dos serviços existentes de cessação do tabagismo, métodos de contato, informações de motivação e fortes mensagens de apoio ou 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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Comparador Ativo: Grupo de controle
|
O conteúdo inclui informações sobre os benefícios de parar de fumar, tabagismo e doenças, métodos para parar, como lidar com os sintomas de abstinência, declaração de abandono, etc.
Os conselhos de prêmios incluem perguntar sobre o histórico de fumantes, avisar sobre o alto risco, aconselhar para desistir, consulte os fumantes para os serviços de cessação de fumar (com um cartão de referência) e fazê -lo novamente.
O conteúdo consiste em informações breves e um destaque dos serviços existentes de cessação do tabagismo, métodos de contato, informações de motivação e fortes mensagens de apoio ou 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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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Abstinência validada bioquimicamente
Prazo: Acompanhamento de 6 meses
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Definido como nível de CO exalado <4ppm e nível de cotinina na saliva ≤30 ng/ml
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Acompanhamento de 6 meses
|
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Abstinência validada bioquimicamente
Prazo: Acompanhamento de 3 meses
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Definido como nível de CO exalado <4ppm e nível de cotinina na saliva ≤30 ng/ml
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Acompanhamento de 3 meses
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Auto-relatada Prevalência de Ponto de 7 dias
Prazo: Acompanhamentos de 3 e 6 meses
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Fumantes que não fumavam nem um sopro nos 7 dias anteriores ao acompanhamento
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Acompanhamentos de 3 e 6 meses
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Redução autorreferida
Prazo: 1-, 2-, 3 e 6 meses de acompanhamento
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Definido por pelo menos 50% de redução no número diário da linha de base de cigarros
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1-, 2-, 3 e 6 meses de acompanhamento
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Uso autorreferido do serviço de cessação de fumar
Prazo: 1-, 2-, 3 e 6 meses de acompanhamento
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Uso do serviço de cessação do tabagismo nos acompanhamentos de 1, 2, 3 e 6 meses.
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1-, 2-, 3 e 6 meses de acompanhamento
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Family well-being
Prazo: 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
Prazo: 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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Outras medidas de resultado
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Recruitment rate
Prazo: 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
Prazo: 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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Acceptability of NRT sampling
Prazo: 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
Prazo: 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
Prazo: 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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Chatbot usability
Prazo: 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.
The score of the Bot Usability Scale ranges from 0 to 100, with the higher score indicating more usability of the chatbot.
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3-month follow-up
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Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Man Ping Wang, PhD, The University of Hong Kong
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Estimado)
Conclusão Primária (Estimado)
Conclusão do estudo (Estimado)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
- Comportamento
- Comportamento de saúde
- Parar de fumar
- Terapêutica
- Comida
- Dieta, comida e nutrição
- Fenômenos fisiológicos
- Comida e bebidas
- Carboidratos
- Polímeros
- Substâncias macromoleculares
- Polissacarídeos
- Produtos biológicos
- Misturas complexas
- Biopolímeros
- Gomas de plantas
- Planta exsuda
- Doce
- Dispositivos de cessação de uso do tabaco
- Goma de mascar
- Goma de mastigação de nicotina
Outros números de identificação do estudo
- Build to Quit
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
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