- ICH GCP
- Registro de ensaios clínicos dos EUA
- Ensaio Clínico NCT07585357
Adaptive Mobile Interventions to Reduce Cancer Risk Behaviors
Tobacco use remains the leading cause of preventable death, causing over 400,000 annual deaths in the United States alone. Smartphone-based interventions, particularly those leveraging real-time adaptive messaging, represent a promising yet underutilized approach to delivering personalized tobacco and cannabis treatment. The investigator's ongoing NCI funded micro-randomized trial (MRT; R01 CA246590) has shown initial feasibility in reducing smoking urges through situationally tailored cognitive-behavioral therapy (CBT) and mindfulness-based acceptance and commitment-based therapy (ACT) messages triggered by real-time contextual data (e.g., geolocation, momentary stress). To advance from a static MRT framework to a dynamic, data-driven just-in-time adaptive intervention (JITAI), this project aims to develop, test, and refine a reinforcement learning (RL) algorithm that can continuously adapt to user needs in real-time, enhancing treatment outcomes for various tobacco and cannabis products.
To ensure optimal usability and engagement, the investigators will conduct user-centered testing with the developed RL-based intervention delivery in one cohort (N=7) over 45 days. This will include usability assessment via the System Usability Scale, analysis of app interaction metrics, and semi-structured interviews to gather feedback for refining message content, timing, and design.
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
Tipo de estudo
Inscrição (Real)
Estágio
- Não aplicável
Contactos e Locais
Locais de estudo
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Maryland
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Baltimore, Maryland, Estados Unidos, 21205
- Johns Hopkins Bloomberg School of Public Health
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
Aceita Voluntários Saudáveis
Descrição
Inclusion Criteria:
- live in the U.S.;
- are between 18 and 40 years of age;
- own a smartphone with iOS and Android operating system and GPS capabilities;
- are carrying smartphone every day;
- are willing to participate in the study for 44 days and give the research team access to the phone GPS data;
- have smoked ≥100 cigarettes in the participant's life and currently smoke at least 3 cigarettes per day on 5 or more days of the week;
- are planning to quit smoking within the next 30 days.
Exclusion Criteria:
- None
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Tratamento
- Alocação: N / D
- Modelo Intervencional: Atribuição de grupo único
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
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Experimental: RL-informed intervention
Participants complete a 14-day Ecological Momentary Assessment (EMA) training phase using a smartphone app (MetricWire), during which the participant responds to up to 3 randomly prompted and cigarette-triggered EMA surveys per day while the app passively collects GPS data.
These data are used to identify high-risk locations and time periods and to inform a previously trained reinforcement learning (RL) algorithm.
During the subsequent 30-day intervention phase, the RL algorithm delivers personalized intervention messages (cognitive-behavioral therapy [CBT], acceptance and commitment therapy [ACT], or attention control) triggered by geofence entry at high-risk locations.
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Intervention messages will suggest strategies of coping with smoking urges in the moment.
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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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Change in smoking urge as assessed by a single item
Prazo: 15 minutes after message delivery
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The primary outcome will be change in participants' rating of smoking urge in EMA-post surveys, prompted 15 minutes after intervention message delivery, and controlling for the ratings in EMA-pre surveys.
Urge will be assessed by a single item on a 5-point scale, ranging from 1-5; (1-very low, to 5-very high).
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15 minutes after message delivery
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Change in cigarettes smoked per day in past week as assessed by a single item
Prazo: Baseline, 45-day follow-up
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The primary outcome will be change in self-reported number of cigarettes smoked per day in the past week from baseline to 45-day follow-up.
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Baseline, 45-day follow-up
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System Usability as assessed by the System Usability Scale (SUS)
Prazo: 45-day follow-up
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The primary outcome will be assessment of the intervention app usability assessed by a slightly modified version of the 10-item System Usability Scale ("system" wording changed to "app").
Each item is assessed on a 5-point scale from 1 (strongly disagree) to 5 (strongly agree).
The SUS total score ranges from 0-100, with higher scores indicating greater usability.
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45-day follow-up
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Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Uso de outros produtos do tabaco desde a entrega da mensagem de intervenção, conforme avaliado por um único item
Prazo: 15 minutos após a entrega da mensagem
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O uso de outros produtos de tabaco, incluindo o uso de cigarro eletrônico, nos 15 minutos após a entrega da mensagem será avaliado por um único item em uma escala de resposta binária (sim/não).
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15 minutos após a entrega da mensagem
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Conclusão da atividade avaliada por um único item
Prazo: 15 minutos após a entrega da mensagem
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A conclusão autorrelatada da recomendação de mensagem de intervenção em pesquisas pós-EMA, solicitada 15 minutos após a entrega da mensagem de intervenção, será avaliada por um único item em uma escala de resposta binária (sim/não).
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15 minutos após a entrega da mensagem
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Auto-relato de abstinência de prevalência pontual de 7 dias, conforme avaliado por um único item
Prazo: Acompanhamento de 45 dias
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A abstinência autorreferida de 7 dias de prevalência pontual (não fumar, nem mesmo uma baforada) será avaliada por um único item em uma escala de resposta binária (sim/não).
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Acompanhamento de 45 dias
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Smoking since intervention message delivery as assessed by a single item
Prazo: 15 minutes after message delivery
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Smoking in the 15 minutes after message delivery will be assessed by a single item on a binary response scale (yes/no).
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15 minutes after message delivery
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Change in stress as assessed by a single item
Prazo: 15 minutes after message delivery
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Change in rating of stress in EMA-post surveys, prompted 15 minutes after intervention message delivery, and controlling for the ratings in EMA-pre surveys.
Stress will be assessed by a single item on a 5-point scale ranging from 1-5 (1-very low, to 5-very high).
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15 minutes after message delivery
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Change in negative affect as assessed by a single item
Prazo: 15 minutes after message delivery
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Change in rating of negative affect in EMA-post surveys, prompted 15 minutes after intervention message delivery, and controlling for the ratings in EMA-pre surveys.
Negative affect will be assessed by a single item on a 5-point scale ranging from 1-5 (1-very low, to 5-very high).
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15 minutes after message delivery
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Message helpfulness as assessed by a single item
Prazo: 15 minutes after message delivery
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Rating of message helpfulness in EMA-post surveys, prompted 15 minutes after intervention message delivery.
This will be assessed by a single item on a 5-point scale ranging from 1-5 (1-not at all helpful, to 5-extremely helpful).
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15 minutes after message delivery
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Change in cigarettes smoked as assessed by a single item
Prazo: Baseline, 45-day follow-up
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Change (reduction) in cigarettes smoked by at least 50% between baseline and 45-day follow-up.
Reduction will be calculated based on self-reported number of cigarettes/day in the past week.
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Baseline, 45-day follow-up
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Tobacco quit attempt as a assessed by a single item
Prazo: 45-day follow-up
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A tobacco quit attempt since the baseline assessment will be assessed by a single item on a binary response scale (yes/no).
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45-day follow-up
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Change in frequency and intensity of smoking urges as assessed by two items of the Mood and Physical Symptoms Scale (MPSS)
Prazo: Baseline, 45-day follow-up
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Change in frequency and intensity of smoking urges will be assessed by two craving items from the Assessed with the Mood and Physical Symptoms Scale (MPSS) - subscale MPSS(C).
Both items will be assessed on a 6-point scale from 0 (not at all / no urges) to 5 (all the time / extremely strong).
Score range 0-10.
Lower score better.
Both items will be combined into the MPSS(C) subscale for analysis.
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Baseline, 45-day follow-up
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Change in psychological flexibility as assessed by the CompACT-15
Prazo: Baseline, 45-day follow-up
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Change in psychological flexibility from baseline to 45-day follow-up will be assessed by the CompACT-15.
The CompACT-15 total score ranges from 0-90, with higher scores indicating better psychological flexibility.
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Baseline, 45-day follow-up
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Change in smoking-specific experiential avoidance as assessed by the Avoidance and Inflexibility Scale (AIS)
Prazo: Baseline, 45-day follow-up
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Change in smoking-specific experiential avoidance from baseline to 45-day follow-up will be assessed by the Avoidance and Inflexibility Scale (AIS).
Items are scored on a scale of 1-5 and combined into a total score.
Score range 13-65, higher total score indicates a more avoidant and inflexible response to internal states associated with smoking.
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Baseline, 45-day follow-up
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Tobacco product switching as assessed by 5 questions
Prazo: Baseline, 45-day follow-up
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Switching to other tobacco products including e-cigarettes from baseline to 45-day follow-up will be assessed using questions about past 7-day use of cigarettes, e-cigarettes, cigars / cigarillos / little cigars, smokeless tobacco, and hookah / waterpipe.
Participants will be coded as having switched if the participant does not report cigarette smoking, but use of another tobacco product at a follow-up assessment.
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Baseline, 45-day follow-up
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Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Johannes Thrul, PhD, Johns Hopkins Bloomberg School of Public Health
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
Conclusão Primária (Real)
Conclusão do estudo (Real)
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
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- IRB00033759
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
Descrição do plano IPD
Tipo de informação de suporte de compartilhamento de IPD
- PROTOCOLO DE ESTUDO
- ANALYTIC_CODE
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