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adolescents

  • by Paul Armentano, NORML Deputy Director May 26, 2016

    no_marijuanaFewer adolescents are consuming cannabis; among those who do, fewer are engaging in problematic use of the plant, according to newly published data in the Journal of the American Academy of Child & Adolescent Psychiatry.

    Investigators at Washington University School of Medicine in St. Louis evaluated government survey data on adolescents’ self-reported drug use during the years 2002 to 2013. Over 216,000 adolescents ages 12 to 17 participated in the federally commissioned surveys.

    Researchers reported that the percentage of respondents who said that they had used cannabis over the past year fell by ten percent during the study period. The number of adolescents reporting problems related to marijuana, such as engaging in habitual use of the plant, declined by 24 percent from 2002 to 2013.

    The study’s lead author acknowledged that the declines in marijuana use and abuse were “substantial.”

    The study’s findings are consistent with previous evaluations reporting decreased marijuana use and abuse by young people over the past decade and a half — a period of time during which numerous states have liberalized their marijuana policies.

    An abstract of the new study, “Declining prevalence of marijuana use disorders among adolescents in the United States, 2002 to 2013,” appears online here.

  • by Paul Armentano, NORML Deputy Director September 21, 2015

    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.

  • by Paul Armentano, NORML Deputy Director September 9, 2015

    Changes in marijuana laws are not associated with increased use of the substance by teens, according to data compiled by Washington’ Healthy Youth Survey and published by the Washington State Institute of Public Policy.

    State survey results from the years 2002 to 2014 show little change in cannabis consumption by Washington teens despite the passage of laws permitting and expanding the use of marijuana for both medical and recreational purposes during this time.

    Self-reported marijuana use fell slightly among 8th graders, 10th graders, and 12th graders during this period. Young people’ self-reported access to cannabis also remained largely unchanged during this time period, although more 8th graders now report that marijuana is “hard to get.”

    The passage of voter-initiated legislation legalizing the adult use of cannabis in 2012 is also not to associated with any increase in consumption by youth. Between 2012 and 2014, self-reported lifetime marijuana use and/or use within the past 30 days either stayed stable or fell among all of the age groups surveyed.

    The report concluded, “[C]annabis use and access among students in 6th through 12th grades have changed little from 2002 through the most recent survey in 2014.”

    The findings are consistent with those of previous assessments acknowledging that liberalizing state marijuana laws does not stimulate increased use among young people.

  • by Paul Armentano, NORML Deputy Director August 10, 2015

    Study: Adolescent Marijuana Use Not Associated With Health Problems In Early Adulthood Marijuana use by adolescents, including self-reported chronic use, is not associated with adverse health effects later in life, according to an assessment of longitudinal data published in the journal Psychology of Addictive Behaviors.

    Investigators from the Pittsburgh School of Medicine and Rutgers University prospectively examined whether young men who consumed cannabis during adolescence and/or young adulthood experienced a heightened risk of developing physical and mental health problems in their mid-30s. Researchers controlled for several potential confounding factors, including subjects’ socioeconomic status, co-occurring use of alcohol, tobacco, and other drugs, and access to medical care and health insurance.

    Researchers reported that marijuana users, including chronic users, were no more likely to self-report experiencing physical or mental health issues than were non-users. Investigators further reported that early onset chronic marijuana use was not associated with an increased risk for the development of depression or anxiety disorders in early adulthood.

    The findings contradicted researchers’ initial hypothesis, as their stated motivation for conducting the study was to “provide empirical evidence regarding the potential adverse consequences of marijuana legalization.”

    Authors concluded: “The present study used prospective, longitudinal data that spanned more than 20 years to examine whether patterns of marijuana use from adolescence to young adulthood were related to indicators of physical and mental health in adulthood. … Overall, data from this sample provide little to no evidence to suggest that patterns of marijuana use from adolescence to young adulthood … were negatively related to the indicators of physical or mental health studied. … This is particularly striking given that men in the early onset chronic group were using marijuana (on average) once per week by late adolescence and continued using marijuana approximately 3-4 times a week from age 20 to 26 years.”

    Full text of the study, “Chronic adolescent marijuana use as a risk factor for physical and mental health problems in young adult men,” 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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