E-cigarette Use

This study examines differences between males and females in the appeal and addiction potential of menthol flavored e-cigarettes with and without nicotine.

The goal of this project is to rigorously evaluate the nature of e-cigarette withdrawal in exclusive e-cigarette users during a monitored abstinence period and the role of nicotine in the expression of this withdrawal syndrome.

The purpose of this research proposal is to develop and evaluate a culturally grounded, ENDS prevention intervention for rural Hawaiian youth. This will be accomplished through two specific aims. AIM 1 (Years 1-3) are focused on pre-intervention and intervention development. In Year 1, youth focus groups will be conducted to assess the environmental demands related to ENDS use in rural Hawai'i. In Year 2, specific ENDS-related problem situations (i.e., situations that increase risk for ENDS use) will be extracted from the Year 1 focus groups and prioritized through survey methods with 200-250 predominately Native Hawaiian youth across 16 different middle/intermediate schools on Hawai'i Island. In Year 3, five situations found to be the most frequently experienced and/or difficult to manage by youth surveyed in Year 2 will serve as the foundation for the development of narrative scripts. Three of these scripts will be cast and filmed on location on Hawai'i Island by a professional film director, and will be edited into three short films, 6-8 video clips, and 6-8 professional photos or production stills. Similar to the investigators' prior drug prevention research in rural Hawai'i, classroom-based lessons will be created to support the short films. Additional lessons and videos from an evidence-based, culturally grounded substance abuse prevention curriculum for Hawaiian youth (Ho'ouna Pono) will be used to create a modular classroom curriculum. The video clips and professional photography/production stills will be embedded with prevention messaging, and will be used for a social and print media campaign to reinforce the classroom curriculum. AIM 2 (Years 4-5) is to evaluate the ENDS prevention intervention (classroom curriculum plus social/print media campaign) across all middle/intermediate public or public-charter schools (N = 16) and up to 11 different cultural immersion charter schools on Hawai'i Island using a dynamic wait-listed control group design.

The goal of this clinical trial is to learn if a brief digital intervention can reduce e-cigarette use and prevent cigarette smoking initiation in teenagers ages 12-17. The main questions it aims to answer are: * Compared to the control condition, does the intervention reduce e-cigarette use frequency in teenagers? * Compared to the control condition, does the intervention reduce risk to start smoking cigarettes in teenagers? Researchers will compare the digital intervention to see if it leads to greater reductions in e-cigarette use and smoking risk than a waitlist control condition. Participants will complete 5 brief online surveys across 12 weeks, and some will be selected to do a post-intervention virtual interview. In this interview, participants will be asked to share their opinions about the intervention and identify areas that need refinement.

The goal of this randomized controlled study is to test if this new intervention works to help adolescents quit vaping. A key feature of the program is the use of peer support for parents, delivered by trained parent coaches. Participants will complete baseline and follow up surveys. Parents in the intervention arm will receive peer support as part of the program.

This between-subjects study aims to evaluate whether e-cigarettes (ECIGS) versus oral nicotine pouches (ONPS) more readily substitute for combustible cigarettes among 200 cigarette smokers. After measuring baseline cigarette smoking rate, participants will be randomized to ECIGS or ONPS and be instructed to switch (versus smoking cigarettes) over a 6-week period. Relative reductions in biomarkers of exposure will be measured. ECIG- and ONP-associated subjective reward and the reinforcing value of ECIGS and ONPS relative to combustible cigarettes will be assessed as mechanisms.

This study will investigate the effects of a very-low-nicotine cigarette (VLNC) standard, e-cigarette price, and illegal cigarette price on illegal product purchasing and alternative product use in a virtual marketplace.

The objective of this proposal is to adapt an evidence-based combustible tobacco counseling intervention following an evidence-based process to include e-cigarette use and update its components for emerging adults (EA). 1. Examine factors related to e-cigarette use, barriers to cessation, and facilitators of use of cessation services among an EA population. 2. Beta-test an initial version of the intervention, delivered via video telehealth and telephone, to examine usability and acceptability.

This is randomized, placebo-controlled clinical trial in treatment-seeking adults who report regular e-cigarette use to test the hypothesis that varenicline is efficacious for quitting e-cigarettes.

The use of electronic nicotine delivery systems, or e-cigarettes - colloquially referred to as "vaping" - in the United States has increased exponentially since their introduction to the US market in 2007. Prevalence of ever and current e-cigarette use is highest among teenagers and young adults with 16-28% of this population having reported vaping. While the majority of e-cigarette users are current tobacco smokers, 32.5% of current e-cigarette users are never- or former-smokers, representing a growing population of young adults who exclusively vape. While e-cigarettes have been marketed as a safer alternative to tobacco cigarettes, clinical studies examining these claims are limited. Cardiovascular disease (CVD) is the primary cause of premature death among tobacco cigarette smokers and reductions in vascular endothelial function, a significant predictor of future CVD, are detectible in otherwise healthy young adults who smoke. Despite the explosion in e-cigarette use among young adults, the health effects - especially the effects on mechanisms of vascular function - of these devices remain relatively unexplored. In this study, we use the blood vessels in the skin as a representative vascular bed for examining mechanisms of microvascular dysfunction in humans. Using a minimally invasive technique (intradermal microdialysis for the local delivery of pharmaceutical agents) we examine the blood vessels in a dime-sized area of the skin in otherwise healthy young (18-24yrs) chronic e-cigarette users. Local heating of the skin at the microdialysis sites is used to explore differences in mechanisms governing microvascular control. As a compliment to these measurements, we also draw blood from the subjects to measure circulating factors that may contribute to cardiovascular health and examine markers of inflammatory activation. We will also collect urine from female participants to measure estradiol.

This is a longitudinal study of the long-term health impact of e-cigarette smoking on the lungs. Participants will be followed over a period of 5 years, and impacts of e-cigarette smoking on the lungs will be measured with magnetic resonance imaging (MRI) using hyperpolarized xenon-129 gas, pulmonary function tests, exercise capacity, computed tomography images and questionnaires.

This is a small pilot randomized controlled trial to evaluate the feasibility, acceptability, and preliminary efficacy of the e-cigarette cessation text-messaging intervention with young adults in rural areas.

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.