Longitudinal trends in e-cigarette devices used by Californian youth, 2014-2018.

Introduction:
This text provides an analysis of a longitudinal study on e-cigarette usage among California adolescents and young adults (aYa) from 2014-2018. The study examines trends in e-cigarette device usage and product switching, with a focus on the impact of JUUL and other pod-based devices. The study's findings offer valuable insights for regulatory agencies and policymakers seeking to address the rising rates of e-cigarette usage among young people.

Key Points:

* The study follows a cohort of 400 California aYa who completed at least five out of seven surveys from 2014-2018.
* The data shows a linear increase in the ever usage of e-cigarettes among the cohort from 14.1% in Wave 1 to 46.2% in Wave 7.
* From Wave 6 to Wave 7, JUUL/pod-based e-cigarette ever-use increased from 14.9% to 22.5%.
* Over time, the proportion of participants who endorsed using a disposable or large rechargeable device as their usual e-cigarette device decreased, while the proportion of participants who endorsed using vape/hookah pens or JUULs/pod-based e-cigarettes increased.
* among JUUL/pod-based-only users, the probability of staying a JUUL/pod-based-only user by the next survey was high, while a small proportion switched to using JUUL/pod-based and another e-cigarette device.
* among those who used JUUL/pod-based and another e-cigarette device in combination, a majority stayed a combination user, while a significant proportion switched to using another device completely.
* The study also notes the limitations of the survey, including changes in language over time and the potential impact of new e-cigarette devices not included in the study.

Main Message:
The study highlights the importance of monitoring and regulating e-cigarette usage among young people, particularly in light of the rise in JUUL and other pod-based devices. The findings suggest that aYa are responsive to advances in e-cigarette technology and are increasingly using newer, more innovative products. Regulatory agencies and policymakers should take note of these trends and consider implementing stronger measures to prevent the initiation of e-cigarette smoking among aYa. This may include restrictions on marketing and flavors, as well as increased education and awareness efforts. Ultimately, a comprehensive approach that addresses the complex factors driving e-cigarette usage among young people is necessary to protect their health and prevent nicotine addiction.

Lin C, Baiocchi M, halpern-Felsher B. Longitudinal trends in e-cigarette devices used by Californian youth, 2014-2018. addictive behaviors. 2020;108:106459. doi:10.1016/j.addbeh.2020.106459