Effects of cannabis legalisation on patterns of cannabis consumption among adolescents in Ontario, Canada (2001-2019).
Canada
cannabis
marijuana smoking
marijuana use
policy
Journal
Drug and alcohol review
ISSN: 1465-3362
Titre abrégé: Drug Alcohol Rev
Pays: Australia
ID NLM: 9015440
Informations de publication
Date de publication:
28 Nov 2023
28 Nov 2023
Historique:
revised:
31
10
2023
received:
11
01
2023
accepted:
06
11
2023
medline:
28
11
2023
pubmed:
28
11
2023
entrez:
28
11
2023
Statut:
aheadofprint
Résumé
Cannabis legalisation was enacted on 17 October 2018 in Canada. Accordingly, the effects of cannabis legalisation on patterns of cannabis consumption were examined among adolescents, including on cannabis initiation, any cannabis use, daily cannabis use and cannabis dependence. Data from a biennial population-based, cross-sectional survey of students in Ontario were pooled in a pre-post design (2001-2019; N = 89,238). Participants provided self-reports of cannabis initiation, any cannabis use, daily cannabis use and cannabis dependence. Long-term trends in these patterns of cannabis consumption over two decades of observation were characterised to provide a broader context of usage. The effects of cannabis legalisation on patterns of cannabis consumption were quantified using logistic regression analyses. Long-term trends over the two decades of observation indicated that cannabis initiation decreased and then increased (p = 0.0220), any cannabis use decreased and daily cannabis use decreased (p < 0.0001 and p = 0.0001, respectively) and cannabis dependence remained unchanged (p = 0.1187). However, in comparisons between the pre-cannabis legalisation period (2001-2017) and the post-cannabis legalisation period (2019), cannabis legalisation was not associated with cannabis initiation (odds ratio; 95% confidence interval 1.00; 0.79-1.27), but it was associated with an increased likelihood of any cannabis use (1.31; 1.12-1.53), daily cannabis use (1.40; 1.09-1.80) and cannabis dependence (1.98; 1.29-3.04). Cannabis legalisation was not associated with cannabis initiation, but it was associated with an increased likelihood of any cannabis use, daily cannabis use and cannabis dependence.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Canadian Institutes of Health Research and Canadian Centre on Substance Use and Addiction
ID : 170394
Organisme : Canadian Institutes of Health Research Institute of Neurosciences, Mental Health and Addiction
ID : SMN-13950
Informations de copyright
© 2023 Australasian Professional Society on Alcohol and other Drugs.
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