Clinical Trials Logo

Clinical Trial Summary

The study will be the first to assess the impact of nicotine concentration on compensatory puffing (total inhaled volume), nicotine delivery, and switch patterns (percent exclusive EC, dual cig-EC, and cig only users) with an explicit focus on AA and White smokers.


Clinical Trial Description

1. E-cigarettes (ECs) are projected to exceed combustible cigarette use within two years. Policy makers, health officials, and regulators are concerned that newer nicotine salt-based Ecs that use high concentrations of nicotine in their e-liquids are a major reason for this rapid growth in use. The US Food and Drug Administration (FDA) has regulatory authority to set appropriate tobacco product standards to protect public health and has shown interest in exploring a product standard limiting the level of nicotine in e-liquids. While this regulatory consideration has merit, emerging research suggests it may be misguided, leading to a product that is just as addictive but more harmful. Specifically, among users of earlier, freebase nicotine Ecs (i.e., cig-a-like, tank systems), use of low nicotine e-liquids was associated with a 9-fold increase in e-liquid consumption and all of its related toxicants, likely due to compensatory puffing. The consequences of consuming more e-liquid because of lower nicotine concentration remains an important knowledge gap. Moreover, the National Academies of Science, Engineering, and Medicine have concluded that completely substituting Ecs for cigarettes results in less short-term harm than continued smoking, but the impact of low versus high nicotine concentration e-liquids on a smokers' ability to completely switch to Ecs (versus become 'dual users' or continue smoking) is currently unknown. African American (AA) smokers, who take larger puffs, inhale more intensely, and extract more nicotine and harmful constituents per cigarette smoked, may be particularly impacted by nicotine product standards placed on EC - i.e., greater compensatory puffing and more e-liquid and related toxicant consumption at lower e-liquid concentrations. Unfortunately, the vast majority of information on Ecs and potential product standards come from white populations and have largely ignored African American (AA) smokers who bear a disproportionate burden of tobacco-related morbidity and mortality. As the FDA considers regulatory action to limit the level of nicotine in e-liquids to protect public health, it is critical that research considers vulnerable populations and does not widen disparities. The long-term goal is to inform a tobacco landscape that will minimize tobacco-related harms and downstream health inequities. The overall objective of this application is to understand the impact of e-liquid nicotine concentration on compensatory puffing, EC and cigarette use patterns (exclusive EC, dual EC-cig, exclusive cig), and resultant exposure to biomarkers of harm among AA and white smokers. Adult AA and white smokers will complete two study phases. In Phase 1, using a randomized crossover design, participants will complete two standardized, 10-puff vaping bouts over 5 mins followed by a 60-minute ad libitum vaping session, using two e-liquids that differ only by nicotine concentration (5% vs. 1.8%) to examine the effect of nicotine concentration on in-lab compensatory puffing, nicotine exposure, and e-liquid consumption. In Phase 2, the same participants will be randomized to 5% or 1.8% nicotine e-liquid and instructed to switch completely for 6 weeks to examine the impact of nicotine concentration on short-term, real-world EC use patterns and related biomarkers of exposure (e.g., exhaled carbon monoxide, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL), lung inflammatory markers). The central hypothesis is that, compared to the high nicotine concentration, while vaping the low nicotine concentration, users will engage in compensatory puffing, resulting in greater e-liquid consumption (Phase 1). Moreover, rates of dual use and continued smoking will be higher for the low (versus high) nicotine concentration and will result in greater exposure to toxicants (Phase 2). ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05887947
Study type Interventional
Source University of Kansas Medical Center
Contact
Status Active, not recruiting
Phase N/A
Start date February 20, 2023
Completion date February 20, 2025

See also
  Status Clinical Trial Phase
Completed NCT03999411 - Smartphone Intervention for Smoking Cessation and Improving Adherence to Treatment Among HIV Patients Phase 4
Completed NCT04043728 - Addressing Psychological Risk Factors Underlying Smoking Persistence in COPD Patients: The Fresh Start Study N/A
Completed NCT04617444 - The ESTxENDS Trial- Substudy on Effects of Using Electronic Nicotine Delivery Systems (ENDS) on Olfactory Function N/A
Completed NCT02796391 - Facilitating Smoking Cessation With Reduced Nicotine Cigarettes Phase 2
Completed NCT03397511 - Incorporating Financial Incentives to Increase Smoking Cessation Among Asian Americans Residing in New York City N/A
Not yet recruiting NCT05188287 - A Culturally Tailored Smartphone Application for African American Smokers N/A
Recruiting NCT05264428 - The Effect of Honey on Lessening the Withdrawal Symptoms N/A
Recruiting NCT05846841 - Personalized Tobacco Treatment in Primary Care (MOTIVATE) N/A
Completed NCT04133064 - Assessment of the Pivot Breath Sensor: Single-Arm Cohort Study N/A
Completed NCT03187730 - Integrating Financial Management Counseling and Smoking Cessation Counseling to Reduce Health and Economic Disparities in Low-Income Immigrants Phase 4
Completed NCT03474783 - To Explore the Factors Affecting the Effectiveness of Smoking Cessation N/A
Completed NCT04635358 - Feasibility Study of Smoking Cessation for the Staff of a Hospital Center N/A
Terminated NCT03670264 - BE Smokefree: Behavioral Economics Incentives to Engage Adolescents in Smoking Cessation N/A
Not yet recruiting NCT06307496 - VIDeOS for Smoking Cessation N/A
Completed NCT02997657 - Positive Psychotherapy for Smoking Cessation Enhanced With Text Messaging: A Randomized Controlled Trial N/A
Completed NCT02905656 - Strategies to Promote Cessation in Smokers Who Are Not Ready To Quit N/A
Completed NCT03206619 - A Health Recommeder System to Tailor Message Preferences in a Smoking Cessation Programme
Completed NCT02562521 - A Smoking Cessation Intervention for Yale Dining Employees Phase 4
Completed NCT02239770 - Pharmacokinetics of Nicotine Film in Smokers N/A
Recruiting NCT02422914 - Benefits of Tobacco Free Cigarette N/A