Introduction The trends in e-cigarette prevalence and population count of users according to
cigarette smoking histories are unknown. These data are needed to inform public health …

Purpose The tobacco and nicotine market is diversifying. Implications for public health will
depend on trends in use, including overall use, and who is using these products. This study …

Abstract Introduction According to the National Youth Tobacco Survey (NYTS), youth e-
cigarette use (vaping) rose between 2017 and 2018. Frequency of vaping and concurrent …

As an extension of a previous cross-sectional study, this study employed prospective data to
test positive outcome expectancy beliefs as mediators of social media's influence on e …

Introduction The objective of this study was to describe tobacco and nicotine product use
state transition probabilities among youth and young adults over time. Methods A national …

Introduction Young adults have the highest prevalence of cigarette and e-cigarette use,
warranting research to identify psychosocial correlates of their use trajectories. Methods …

Little research has examined the new onset of cigarette and Electronic Nicotine Delivery
System (ENDS) dependence symptoms among young adults. This study aims to 1) examine …

Objectives. To assess how and in what extent the electronic nicotine delivery systems
(ENDS) use substituted the consumption of traditional combustible cigarettes (c-cigarettes, c …

Objective JUUL-brand electronic cigarettes (e-cigarettes) contain higher levels of nicotine
than other e-cigarettes. The current study examined the relationship between young adults' …

Background Little is known about factors that influence marijuana vaping among young
people. We examined cigarette, e-cigarette and marijuana use experiences, social network …