Clinical trial NCT05892445: Impact of Aversive Warnings on E-Cigarette Cessation
Official title: Impact of Aversive Visual Health Warnings on E-Cigarette Cessation Intentions and Behaviors Among Young Adults
Study type: INTERVENTIONAL
Overall status: NOT_YET_RECRUITING
Phase: PHASE3
Conditions: E Cigarette Use
Lead sponsor: University of California, San Diego
Sponsor class: OTHER
First posted: 2023-06-07
Enrollment: 1000
Sex: ALL
Minimum age (years): 18
Maximum age (years): 29
Standard ages: ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: OTHER

Brief summary: This project aims to evaluate the effectiveness of aversive visual health warnings on e-cigarette cessation among young adults through a randomized controlled trial, as e-cigarette use among this population has been steadily increasing, posing significant public health concerns. While traditional tobacco products have long featured health warnings, e-cigarettes lack similarly aversive visual warnings, and this study seeks to inform the development of targeted e-cigarette cessation strategies and contribute to a deeper understanding of how visual health warnings can be utilized to reduce e-cigarette use and ultimately improve public health. The project has three main aims, which include a rigorous assessment of the academic literature on e-cigarette risks and adverse effects to develop evidence-based mock visual health warnings for e-cigarettes; assessing the effectiveness of aversive visual health warnings in increasing intent to cessate e-cigarettes, with a particular focus on individuals who have experienced adverse events; and examining the long-term impacts of visual health warnings on e-cigarette cessation. This study will also investigate the underlying mechanisms that may explain the relationship of the intervention on cessation. To generate visual warnings, the research team will conduct a thorough review of the scientific literature on e-cigarette risks and adverse effects and collaborate with a graphic designer. Experimental warnings will be annotated and categorized in order to understand the influence of different imagery on variations in participant response. The study will be conducted as a randomized controlled trial, recruiting participants through market research firms that will distribute an online survey to their panels of e-cigarette users. Participants will be eligible for inclusion if they are 18-29 years old and currently use e-cigarettes at least once per week. A quota will be included to ensure sufficient responses from individuals who have experienced at least one adverse event related to e-cigarette use in the past 12 months. The intervention group will be exposed to a series of aversive visual health warnings about the potential health risks of e-cigarette use, delivered through the online survey platform, while the control group will not receive any intervention and will complete the same survey as the intervention group. Data will be analyzed using appropriate statistical techniques, including logistic regression and mediation/moderation analysis, to assess the effectiveness of the aversive visual health warnings in reducing e-cigarette use and the moderating effects of prior adverse event experience. Participants will be contacted for follow-up assessments at 3-months post-intervention to investigate the impact of aversive visual health warnings on e-cigarette cessation among young adults, including the moderating effects of prior adverse event experience, and assess the underlying mechanisms that may explain the relationship between the intervention and e-cigarette cessation.


Eligibility criteria: * Age 18-29 years
* Basic understanding of English
* Not institutionalized
* Currently use e-cigarettes at least once per week

Primary outcomes:
measure: Intent to Cessate Use of E-Cigarettes
timeFrame: Immediately after exposure to intervention
Secondary outcomes:
measure: E-Cigarette Cessation Attempt
timeFrame: Six months after exposure to intervention
Other outcomes:
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