CHICAGO — New analysis suggests legalizing leisure marijuana for U.S. adults in some states might have barely lowered teenagers’ odds of utilizing pot.
One purpose could also be that it’s tougher and costlier for teenagers to purchase marijuana from licensed dispensaries than from sellers, mentioned lead writer Mark Anderson, a well being economist at Montana State College.
The researchers analyzed nationwide youth well being and conduct surveys from 1993 via 2017 that included questions on marijuana use. Responses from 1.four million highschool college students have been included.
Thirty-three states have handed medical marijuana legal guidelines and 11 have legalized leisure use — typically for ages 21 and up, many in the course of the research years. The researchers checked out general adjustments nationwide, however not at particular person states.
The research was revealed Monday in JAMA Pediatrics.
Earlier analysis has discovered no impact on teen use from medical marijuana legal guidelines, and conflicting outcomes from leisure marijuana legal guidelines. The brand new outcomes echo a research displaying a decline in teen use after gross sales of leisure pot started in 2014 in Washington state.
The outcomes “ought to assist to quell some issues that use amongst teenagers will truly go up. This is a crucial piece when weighing the prices and advantages of legalization,” Anderson mentioned.
About 20% of U.S. highschool college students use marijuana, unchanged since 2015 after an earlier decline, in response to the 2017 model of the surveys used within the research. Charges ranged from 13% of ninth graders to 26% of highschool seniors, in response to the survey information from the federal Facilities for Illness Management and Prevention.
“Repeated marijuana use throughout adolescence might result in long-lasting adjustments in mind perform,” authors of the brand new research wrote. Within the short-term, it might probably trigger impaired reminiscence and a spotlight issues lasting weeks. Frequent use beginning within the early teenagers might decrease IQ scores; some children could also be extra susceptible to pots’ results due to genetics or different elements.
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