Objectives: Despite significant potential adverse health outcomes, many cancer survivors continue smoking. Few smoking cessation interventions have demonstrated efficacy above standard treatment for this population. Through a rigorous iterative process, we developed a prototype smartphone app that addresses both general and cancer-specific relapse risks in real time, incorporating cancer survivors' feedback. We report findings from two studies: (1) Qualitative interviews and brief surveys to inform intervention development and (2) Usability testing of the prototype app in a 4-week single-arm pilot trial.
Methods: Cancer survivors (Study 1: n = 20; Study 2: n = 12) who had smoked at least one cigarette within the past 30 days were enrolled. Study 1 participants completed a 50-minute Zoom interview and survey to inform intervention content and the app design. Subsequently, a prototype app was developed and tested for usability in Study 2, which included ecological momentary interventions (EMIs), three telehealth counseling sessions, and nicotine patches. Baseline and end-of-treatment (EOT) surveys and interviews were completed.
Results: Key findings in Study 1 included high perceived helpfulness of mindfulness and EMIs for managing cravings and cancer-related stress, and a reported strong willingness to use the app. In Study 2, eleven participants used the app and completed counseling sessions. Participants reported high treatment acceptability, app usability, and ease of use. A key suggested improvement was adjusting the timing of app notifications.
Conclusions: Results support continued investigation of this app. Next steps include testing the feasibility and acceptability of the app for smoking cessation.
Preregistration: Study 2 is registered in ClinicalTrials.gov (NCT06476548).
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