Thursday, December 14, 2017
Less encouraging new data from Monitoring the Future study concerning teenager marijuana use (but good news regarding other drugs)
In this post earlier this week, titled "Encouraging new data from National Survey on Drug Use and Health concerning teenager marijuana use," I noted my personal skepticism of contentions that teen marijuana use would go down in the wake of marijuana legalization. But, as detailed in that prior post, some new numbers from the National Survey on Drug Use and Health suggests this could be the reality in at least some legalization states for now.
But, as detailed in this new press release, headed "Marijuana Use Edges Upward," another set of new data does not tell a story quite so rosy with respect to use of marijuana by youngsters. Here are the basics:
Marijuana use among adolescents edged upward in 2017, the first significant increase in seven years. Overall, past-year use of marijuana significantly increased by 1.3% to 24% in 2017 for 8th, 10th, and 12th graders combined. Specifically, in 8th, 10th, and 12th grades the respective increases were 0.8% (to 10.1%), 1.6% (to 25.5%) and 1.5% (to 37.1%). The increase is statistically significant when all three grades are combined.
“This increase has been expected by many” said Richard Miech, the Principal Investigator of the study. “Historically marijuana use has gone up as adolescents see less risk of harm in using it. We’ve found that the risk adolescents see in marijuana use has been steadily going down for years to the point that it is now at the lowest level we’ve seen in four decades.”
The results come from the annual Monitoring the Future study, now in its 43rd year. About 45,000 students in some 380 public and private secondary schools have been surveyed each year in this U.S. national study, designed and conducted by research scientists at the University of Michigan’s Institute for Social Research and funded by the National Institute on Drug Abuse. Students in grades 8, 10 and 12 are surveyed.
This increase in marijuana drove trends in any illicit drug use in the past year. In both 12th and 10th grade this measure increased (although the increase was not statistically significant), while use of any illicit drug use other than marijuana declined (although the decrease was not statistically significant). In 8th grade neither of these drug use measures significantly changed, although they both increased slightly.
As this blurb highlights, a decline in the use of other illicit drugs emerges from this 2017 data, and also "cigarette smoking by teens [for] all measures (lifetime, 30-day, daily, and half-pack/day) are at historic lows since first measured in all three grades in 1991." Though there is research to suggest an increase in marijuana use by teens is not a positive public health story, a reduction in the use of cigarettes and other illicit drugs certainly is. These stories may or may not be causally connected, but all these data reinforce for me how intricate (and perhaps conflicting) data may be about the impact of marijuana reforms on teen behaviors and public health.
Prior recent related post: