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  • by Paul Armentano, NORML Deputy Director July 11, 2017

    no_marijuanaYet another study has once again affirmed that the regulation of marijuana for medical or recreational purposes is not associated with increases in problematic cannabis use by young people.

    Writing in the Journal of Clinical Psychiatry, federal investigators from the US National Institute on Drug Abuse and the Substance Abuse Mental Health Services Administration evaluated marijuana use rates among young people (ages 12 to 17) between the years 2002 and 2014.

    Researchers reported that the prevalence of past-year cannabis use by youth fell 17 percent during this time period. The prevalence of problematic use by young people fell by 25 percent – with a downward trend starting in 2011.

    “In the United States, compared to 2002, even after adjusting for covariates, cannabis use decreased among youth during 2005-2014, and cannabis use disorder declined among youth cannabis users during 2013-2014,” authors concluded.

    The study’s findings are consistent with those of numerous other papers reporting no uptick in youth marijuana use or abuse following the enactment of marijuana regulation, including those here, here, here, here, here, here, and here.

    An abstract of the study, “Cannabis use and cannabis use disorders in the United States, 2002-2014,” appears online here.

  • by Paul Armentano, NORML Deputy Director June 13, 2017

    no_marijuanaThe enactment of medical marijuana laws is not associated with increased rates of problematic cannabis use, according to data published online in the journal Addiction.

    Columbia University investigators assessed cannabis use trends in states in the years following the passage of medicalization. They reported “no significant change in the prevalence of past-month marijuana use among adolescents or young adults (those ages 18 to 25)” following legalization. They also found no evidence of increased cannabis abuse or dependence by either young people or adults. States with largely unregulated medical programs were associated with increased self-reported use by adults age 26 and older, but states with stricter programs were not.

    The study’s findings are consistent with those of numerous other papers reporting no uptick in youth marijuana use or abuse following medical marijuana regulation, including those here, here, here, here, here, and here. The findings contradict those of a recent, widely publicized paper in JAMA Psychiatry which speculated that medical marijuana laws may increase the prevalence of cannabis use disorder among adults.

    An abstract of the study, “Loose regulation of medical marijuana programs associated with higher rates of adult marijuana use but not cannabis use disorder,” is online here.

  • by Paul Armentano, NORML Deputy Director October 31, 2016

    no_marijuanaChanges in marijuana’s legal status under state law is not associated with increased cannabis use or with its perceived availability by young people, according to pair of recently published studies.

    In the first study, published online in the journal Substance Use & Misuse, researchers at Columbia University in New York surveyed the marijuana use habits of a national sampling of 1,310 adolescents between the years 2013 and 2015. Investigators assessed whether respondents from states with liberalized cannabis policies were more likely to acknowledge having consumed cannabis compared to those residing in jurisdictions where the substance remains criminally prohibited.

    Authors reported that the study’s findings “failed to show a relationship between adolescents’ use of marijuana and state laws regarding marijuana use.” … [They] suggest that eased sanctions on adult marijuana use are not associated with higher prevalence rates of marijuana use among adolescents.”

    In the second study, published in the journal Drug and Alcohol Dependence, a team of investigators from Columbia University, the University of California at Davis, and Boston University examined the relationship between medical cannabis laws and the prevalence of marijuana availability and use by both adolescents and by those age 26 or older. Authors reported no changes over a nine-year period (2004 to 2013) with regard to the past-month prevalence of marijuana use by those ages 12 to 17 or by those between the ages of 18 and 25. Those age 25 and younger also experienced no change in their perception of marijuana’s availability. By contrast, self-reported marijuana use and availability increased among adults age 26 or older over this same time period.

    The conclusions are similar to those of numerous separate studies reporting that changes in marijuana’s legal status are not associated with any uptick in teens’ use of the substance, such as those here, here, here, and here.

    Abstracts of the two studies, “Is the Legalization of Marijuana Associated With Its Use by Adolescents?” and “State-level medical marijuana laws, marijuana use and perceived availability of marijuana among the general U.S. population,” appear online here and here.

  • by Paul Armentano, NORML Deputy Director September 2, 2016

    no_marijuanaProhibitionists often claim that legalizing and regulating marijuana will increase youth access to the plant. But newly released federal data says just the opposite.

    Fewer young people are reporting that marijuana is ‘easy’ to obtain, according to an analysis released this week by the US Centers for Disease Control.

    Investigators from the Substance Abuse and Mental Health Services Administration and the CDC evaluated annual data compiled by the National Survey on Drug Use and Health for the years 2002 to 2014. Researchers reported that the percentage of respondents aged 12 to 17 years who perceived marijuana to be “fairly easy or very easy to obtain” fell by 13 percent during this time period. Among those ages 18 to 25, marijuana’s perceived availability decreased by three percent.

    Researchers further reported that “since 2002, the prevalence of marijuana use and initiation among U.S. youth has declined” – a finding that is consistent with numerous prior studies.

    By contrast, authors reported an uptick in use among adults. However, they acknowledged that this increase in adult marijuana consumption has not been associated with a parallel increase in problematic use. There has been “steady decreases in the prevalence of marijuana dependence and abuse among adult marijuana users since 2002,” the study found. Those adults experiencing the greatest percentage increase in marijuana use during the study period were respondents over the age of 55.

    A separate analysis of the data published in the journal Lancet Psychiatry similarly acknowledged no observed increase in marijuana use disorders. A previous assessment of marijuana use patterns since 2002, published earlier this year in JAMA Psychiatry, also reported a decline in the percentage of adults reporting problems related to their marijuana use.

    Full text of the CDC study, “National estimates of marijuana use and related indicators – National Survey on Drug Use and Health, 2002-2014,” appears online here.

  • by Paul Armentano, NORML Deputy Director July 13, 2015

    Study: Changes In State Marijuana Laws Are Not Associated With Greater Use Or Acceptance By Young PeopleThe use of marijuana by younger adolescents is falling while their perceived disapproval of cannabis use is rising, according to data published this week in The American Journal of Drug and Alcohol Abuse.

    Investigators from the University of Texas at Austin evaluated trends in young people’s attitudes toward cannabis and their use of the substance during the years 2002 to 2013 – a time period where 14 states enacted laws legalizing the medical use of the plant, and two states approved its recreational use by adults. (Six states also enacted laws decriminalizing marijuana possession offenses during this time.) Analyses were based on self-reported measurements from a nationally representative sample of 105,903 younger adolescents (aged 12-14); 110,949 older adolescents (aged 15-17); and 221,976 young adults (aged 18-25).

    Researchers reported that the proportion of adolescents age 12 to 14 who strongly disapproved of marijuana use rose significantly during this period. The percentage of 12 to 14-year-olds reporting having used marijuana during the past year fell significantly during this same time period.

    Among youth age 15 to 17, past year cannabis use also fell significantly, while young people’s perception of marijuana remained largely unchanged.

    “Our results may suggest that recent changes in public policy, including the decriminalization, medicalization, and legalization of marijuana in cities and states across the country, have not resulted in more use or greater approval of marijuana use among younger adolescents,” the study’s lead investigator said in a press release.

    Young adults age 18 to 25, in contrast to their younger peers, were less likely in 2013 to disapprove of the use of cannabis. However, this change in attitude was not positively associated with significant rises in past year marijuana use by members of this age group, researchers reported.

    Separate survey data reported by the University of Michigan has reported an overall decline over the past decade in the percentage of young people perceiving a “great risk” associated with the use of marijuana. However, this decline in perceived risk has not been accompanied by a parallel increase in cannabis use by young people.

    The abstract of the study, “Trends in the disapproval and use of marijuana among adolescents and young adults in the United States: 2002-2013,” appears online here
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