Figure 2. Overall Changes in Cannabis Use and Consequences Over 7 Waves.
The dotted line indicates legalization of cannabis in Canada on October 17, 2018. Square time points indicate P < .05 vs time 1 and 2.
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.