Key Points
Question Did cannabis use or misuse change among adults in the 5 years following recreational cannabis legalization in Canada (overall and by prelegalization cannabis use frequency)?
Findings In this cohort study including 1428 adults, cannabis use frequency increased significantly overall while misuse decreased, with small effect sizes for both. Prelegalization cannabis use significantly moderated these changes.
Meaning From a public health standpoint, this cohort study found modest changes (both negative and positive) in cannabis use behaviors in the 5 years following legalization in Canada.
Read more: JAMA Network Open
