Trajectories of Nicotine and Cannabis Vaping and Polyuse From adolescence to Young adulthood.

Introduction:
This text provides an analysis of nicotine and cannabis vaping trajectories and polysubstance vaping from adolescence to young adulthood. The study identifies developmental trajectories of nicotine and cannabis vaping, examines co-occurring nicotine and cannabis vaping trajectories, and discusses the implications of these findings for public health policy and prevention efforts.

Key Points:

* The study uses a prospective longitudinal design following a cohort of adolescents through young adulthood (15.5 to 18.5 years of age).
* The analysis identifies five nicotine vaping trajectories and five cannabis vaping trajectories, with the largest trajectory class being non-users for both substances.
* The study found that males were more likely to be members of the adolescent-onset escalating frequent users trajectory for both nicotine and cannabis vaping.
* The analysis also identified co-occurring nicotine and cannabis vaping trajectories, with most individuals classified into a nicotine-use vaping trajectory also being classified into a cannabis-use vaping trajectory.
* The findings suggest that public health policy and clinical interventions should address polysubstance vaping in both adolescence and young adulthood.

Main Message:
The study highlights the importance of understanding nicotine and cannabis vaping trajectories and co-occurring polysubstance vaping from adolescence to young adulthood. The findings suggest that prevention efforts should address both nicotine and cannabis vaping and consider the unique risks associated with different developmental trajectories. The study also emphasizes the need for public health policy to consider the potential benefits of prevention efforts in young adulthood, in addition to adolescence, to substantially reduce nicotine and cannabis vaping.

Lanza hI, Barrington-Trimis JL, McConnell R, et al. Trajectories of Nicotine and Cannabis Vaping and Polyuse From adolescence to Young adulthood. JaMa network open. 2020;3(10):1. doi:10.1001/jamanetworkopen.2020.19181