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Prelegalisation patterns and trends of cannabis use among Canadian youth: results from the COMPASS prospective cohort study

BMJ open, 2019-03, Vol.9 (3), p.e026515-e026515 [Peer Reviewed Journal]

Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. ;2019 Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/ . Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. 2019 ;ISSN: 2044-6055 ;EISSN: 2044-6055 ;DOI: 10.1136/bmjopen-2018-026515 ;PMID: 30898832

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  • Title:
    Prelegalisation patterns and trends of cannabis use among Canadian youth: results from the COMPASS prospective cohort study
  • Author: Zuckermann, Alexandra M E ; Battista, Katelyn ; de Groh, Margaret ; Jiang, Ying ; Leatherdale, Scott T
  • Subjects: Adolescent ; Age ; Alberta - epidemiology ; Alcohol ; Child ; Court decisions ; Cross-Sectional Studies ; Data collection ; Drug use ; Epidemiology ; Female ; Humans ; Male ; Marijuana ; Marijuana Smoking - epidemiology ; Marijuana Smoking - legislation & jurisprudence ; Native peoples ; Ontario - epidemiology ; Prescription drugs ; Prospective Studies ; Public Health ; Questionnaires ; Schools ; Schools - statistics & numerical data ; Students ; Students - statistics & numerical data ; Surveillance ; Teenagers ; Trends
  • Is Part Of: BMJ open, 2019-03, Vol.9 (3), p.e026515-e026515
  • Description: ObjectiveCanada federally legalised recreational cannabis use among adults in October 2018. The impact this will have on Canadian youth is cause for concern. The current study examined changes in youth cannabis use over the time prior to legalisation to explore the impact of the beginning federal discourse around legalisation during the 2016/2017 school year.DesignCOMPASS, a prospective cohort study based on annual self-administered questionnaires.SettingOntario and Alberta during the first 6 years of the COMPASS study (2012/2013 to 2017/2018).ParticipantsCanadian grade 9–12 students attending secondary schools participating in COMPASS. In total, 2 30 404 questionnaires were included in the analysis (Y1: 2012/2013, n=24 173; Y2: 2013/2014, n=45 298; Y3: 2014/2015, n=42 355, Y4: 2015/2016, n=40 436; Y5: 2016/2017, n=37 060; Y6: 2017/2018, n=34 897).Primary and secondary outcome measuresLifetime cannabis use, past-year cannabis use, weekly cannabis use, ease of access to cannabis and age at first cannabis use.ResultsCannabis never-use decreased between Y5 and Y6. Changes in age at first cannabis use mirrored this trend, with male students consistently starting younger. Cannabis access rates increased from Y4, mainly led by female students. Lifetime and past-year use rates were lowest in Y4 then increased in Y5 and Y6 due to a rise in the occasional use more common among female students, who reported use increases first. Non-white students were more likely use cannabis, with black and Aboriginal students the only two groups consistently reporting more weekly than occasional use, though with opposing trajectories. Overall, Aboriginal students had the highest odds of reporting lifetime, past-year and weekly use among the demographic groups examined.ConclusionAfter a steady decrease in patterns of cannabis among youth over several years, it appears that there has been a gradual increase in cannabis use among youth following the start of discourse around cannabis legalisation, with some populations of youth being at greater risk.
  • Publisher: England: BMJ Publishing Group LTD
  • Language: English
  • Identifier: ISSN: 2044-6055
    EISSN: 2044-6055
    DOI: 10.1136/bmjopen-2018-026515
    PMID: 30898832
  • Source: ProQuest One Psychology
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