Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Discontinuous growth curve model showing the pre-2017 trajectories, elevation change, and post-2017 trajectories for younger and older young adults.
Note. Elevation change connects the two trajectories and was modeled at fall 2017 to represent the point in time when vape pods rose rapidly in popularity in the United States.
