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Effect of E-Liquid Flavor on Respiratory Symptoms in People Using Electronic Nicotine Delivery Systems

A Randomized, Parallel-group Open-label Trial of ENDS Users Switching From Flavors of Potentially High-toxicity Profile to Flavors of Potentially Low-toxicity Profile (CRoFT_3.2)

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05423340
Acronym
CRoFT
Enrollment
163
Registered
2022-06-21
Start date
2022-06-12
Completion date
2024-10-03
Last updated
2025-01-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Electronic Cigarette Use

Brief summary

This is a randomized, parallel-group open-label trial to evaluate respiratory symptoms in ENDS users switching from banned flavors to a non-banned flavor (tobacco) or 'tobacco free' nicotine pouches.

Interventions

Participants use an electronic nicotine delivery system with an assigned tobacco-flavored e-liquid

OTHERTobacco Free Nicotine Pouch

participants will use tobacco free oral nicotine pouches

Sponsors

University of Rochester
CollaboratorOTHER
National Institutes of Health (NIH)
CollaboratorNIH
National Cancer Institute (NCI)
CollaboratorNIH
Roswell Park Cancer Institute
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
21 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

* ENDS users as determined by: (a) using banned flavored ENDS with nicotine such as fruit, candy, dessert flavors, and/or any product that indicates such flavors (b) using ENDS daily, regularly for the past 6 months (self-reported). * No smoking tobacco or using smokeless tobacco for the past 6 months. * Subjects should be free of acute respiratory illness within the proceeding 30 days prior to recruitment (self-reported). * Participant must understand the investigational nature of this study and sign an Independent Ethics Committee/Institutional Review Board approved written informed consent form prior to receiving any study related procedure. * After receiving information regarding the NYS flavor ban individuals must not want to quit vaping or stop using their flavored product for the next 90 days.

Exclusion criteria

* Individuals with health conditions and therapies that may affect immune responses and levels of inflammatory markers, including allergic rhinitis, aspirin/NSAID therapy, asthma, immunodeficiency (HIV or other), Guillain-Barre Syndrome, COPD, or fever/respiratory illness within 30 days prior to entry into study (self-reported). * Pregnant or nursing female participants (self-reported on telephone screener, pregnancy test on Visit#1) * Unable to communicate in English. * Unable or unwilling to follow protocol requirements. * Self-report having active, untreated medical/psychiatric conditions. * History of serious side effects from nicotine or from any nicotine replacement therapies. * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements * Vulnerable populations, such as cognitively impaired adults, individuals who are not yet adults, pregnant women, and prisoners. * Any condition which in the Investigator's opinion deems the participant an unsuitable candidate to receive study drug. * After receiving information about the NYS flavor ban, participants who report that they are thinking about quitting or stop using their flavor within the next 90 days.

Design outcomes

Primary

MeasureTime frameDescription
Risk biomarkers of inflammation and oxidative stress as measured by ELISAUp to 90 daysOxidative stress and inflammation in plasma using ELISA . A quantitative measure of expression (units:pg/mg) will be produced.
Respiratory tract inflammation activityUp to 90 daysExhaled Nitric Oxide (FeNo)l be measured in participants' breath using a FDA cleared monitor NIOX VERO (Aerocrine) according to ATS guidelines. FeNO has been used to monitor airway inflammation to account for persistent and/or high allergen exposure as a factor associated with higher levels of FeNO

Secondary

MeasureTime frameDescription
Amount of recent flavored product useUP to 90 daysAssessed using the PhenX Toolkit which tracks tobacco use and asks subjects to retrospectively estimate product use,
Flavor Preference questionnaireUp to 90 daysPersonal flavor questionnaire to determine flavor preference when using ENDS.
Frequency of flavored product useUp to 90 daysQuestions from Wave 1 Adult PATH Survey to measure use and regularity of use flavored products

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026