Self-reported use of marijuana by high-school students is significantly lower today than it was 15 years ago, according to an analysis of CDC data published in the journal Drug and Alcohol Dependence.
Researchers from the Johns Hopkins Bloomberg School of Public Health in Baltimore assessed data compiled by US Center for Disease Control’s National Youth Risk Behavior Survey for the years 1999 to 2013. The Survey is a biennial school-based evaluation of more than 100,000 high-schoolers nationwide.
Investigators reported that lifetime use of cannabis fell during this period. The percentage of respondents reporting monthly marijuana consumption and/or use any use of cannabis prior to age 13 also declined.
“People have been very quick to say that marijuana use is going up and up and up in this country, particularly now that marijuana has become more normalized,” study leader Renee M. Johnson, PhD, MPH, an assistant professor in the Department of Mental Health at the Bloomberg School said in a press release. “What we are seeing is that … the rates of marijuana use have actually fallen.”
The study is the latest in a series of recent evaluations — including this one here, here, here, here, here, here, here, here, and here — concluding that changes in state marijuana policies are not associated with increased marijuana use by young people.
Moreover, just-released results from a separate University of Texas study assessing trends in the disapproval of marijuana by young people also reports “a significant increase in the proportion of youth (age 12 to 14) reporting ‘strong disapproval’ of marijuana use initiation over the last decade.” Similar to the findings of prior studies, the paper also reports that teens’ lifetime and past year use of marijuana has declined significantly over the past decade.