Increased e-cigarette use prevalence is associated with decreased smoking prevalence among US adults.

Background: If US adults who smoke cigarettes are switching to e-cigarettes, the effect may be observable at the population level: smoking prevalence should decline as e-cigarette prevalence increases, especially in sub-populations with highest e-cigarette use. This study aimed to assess such effects in recent nationally-representative data.

Methods: We updated a prior analysis with the latest available National Health Interview Survey data through 2022.

Methodological considerations when assessing symptoms of nicotine dependence by cigarette and e-cigarette use behavior and brand.

Letter to the Editor re: Adjei et al., 2024. Symptoms of nicotine dependence by e-cigarette and cigarette use behavior and brand: A population-based, nationally representative cross-sectional study.

What Substances Are Adolescents Vaping? Estimating Nicotine-Specific and Cannabis-Specific Vaping from US National Youth Surveys.

Background: Youth use of electronic cigarettes ("e-cigarettes") is an ongoing concern. Vaping is usually assumed to be of nicotine, but survey responses may also include vaping of non-nicotine substances (particularly cannabis), which can impose different risks. The current study quantifies the proportions of nicotine-specific and cannabis-specific vaping among adolescents.

Comment on Wang et al. Consumption of JUUL vs. Other E-Cigarette Brands among U.S. E-Cigarette Users: Evidence from Wave 5 of the PATH Study. 2022, , 10837.

This comment is to express concern about an article by Wang et al. [..

Re: "Impact of the e-cigarette era on cigarette smoking among youth in the United States: A population-level study".

This is a letter to the editor of Preventive Medicine responding to Harrell et al.'s "Impact of the e-cigarette era on cigarette smoking among youth in the United States: A population-level study." (Harrell MB, Mantey DS, Baojiang C, Kelder SH, Barrington-Trimis J.

Population-level counterfactual trend modelling to examine the relationship between smoking prevalence and e-cigarette use among US adults.

Background: Studies have suggested that some US adult smokers are switching away from smoking to e-cigarette use. Nationally representative data may reflect such changes in smoking by assessing trends in cigarette and e-cigarette prevalence. The objective of this study is to assess whether and how much smoking prevalence differs from expectations since the introduction of e-cigarettes.

Estimating E-Cigarette Use Prevalence among US Adolescents UsingVaping-Related Online Search Trends.

Adolescent e-cigarette use is a developing phenomenon. Greater surveillance of underage use is necessary to inform e-cigarette policy and mitigate adolescent e-cigarette use. Accurate prevalence estimates for adolescent e-cigarette use are provided by large national surveys.

Trends in electronic cigarette use and conventional smoking: quantifying a possible 'diversion' effect among US adolescents.

Background And Aims: The impact of electronic cigarettes (ECs) on nicotine use is hotly debated: some fear that ECs are a 'catalyst' to conventional smoking, while others argue that they divert adolescents from the more harmful product. This study used simulation modeling to evaluate the plausibility of catalyst and diversion hypotheses against real-world data.

Design: A simulation model represented life-time exclusive EC use, exclusive conventional smoking and dual use as separate subpopulations.

Electronic cigarettes, nicotine use trends and use initiation ages among US adolescents from 1999 to 2018.

Background And Aims: Recent nicotine use trends raise concerns that electronic cigarettes (ECs) may act as a gateway to cigarettes among adolescents. The aims of this study were to examine prevalence trends of exclusive EC use, exclusive cigarette use and dual use to determine the corresponding ages of initiation and to investigate hypothetical trends in total nicotine use and cigarette use in the absence of ECs among US adolescents.

Design: Observational study using data from the National Youth Tobacco Survey (NYTS) to statistically model trends in the prevalences of each user group and their initiation ages.