Lifetime rates of DSM-5 cannabis use disorder were highest in those aged 18–29. This could be artifactual due to recall failure for earlier disorders among older individuals (79). However, this report and others (17) show that risk for onset of cannabis use disorder peaks in late adolescence/early 20s, and remission often occurs within 3–4 years (17, 80). Given that, the finding of higher rates of lifetime disorders among those aged 18–29 may well be valid. Further studies are needed to address this issue.
