- In the four states where recreational marijuana was legal by 2016, there was a small uptick in cannabis use disorder among adults and teens, and a general rise in use by adults, a new study suggests.
To look at the impact of legalization, Cerda and her colleagues turned to the National Survey on Drug Use and Health , which each year collects data on more than 17,500 adolescents aged 12 to 17, as well as 17,500 young adults aged 18 to 25 and 18,800 adults aged 26 and older. The survey used audio-based, computer-assisted self-interviews to reduce concerns about confidentiality.
Cannabis use disorder rose from 2.18per cent to 2.72per cent among all adolescents aged 12 to 17 in states where legalization occurred, a 25per cent larger increase than was seen in the states that had not legalized recreational use. In the same age group, among just those who had used cannabis in the past year, there was an increase from 22.8per cent to 27.2per cent in cannabis use disorder with legalization.
The new study is"important because there are few studies that have looked at the impact of legalization of recreational cannabis on use and problematic use," said Ziva Cooper, director of research for the Cannabis Research Initiative at the University of California, Los Angeles."It's also the first to look at this in specific age groups."
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