Harman S Sandhu1, Laura N Anderson1, Jason W Busse2. 1. Department of Health Research Methods, Evidence, and Impact (Sandhu, Anderson), and Centre for Health Economics and Policy Analysis (Anderson), McMaster University; Department of Anesthesia (Busse), Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University, Hamilton, Ont. 2. Department of Health Research Methods, Evidence, and Impact (Sandhu, Anderson), and Centre for Health Economics and Policy Analysis (Anderson), McMaster University; Department of Anesthesia (Busse), Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University, Hamilton, Ont. bussejw@mcmaster.ca.
Abstract
BACKGROUND: The Government of Canada legalized nonmedical use of cannabis in October 2018. Our objectives were to determine the percentage of Canadians intending to try or increase their cannabis use following legalization and to explore characteristics associated with this intent. METHODS: We used data from the 2018 National Cannabis Survey and constructed multivariable regression models. Respondents' data were weighted and bootstrapped. We report relative measures of association as adjusted odds ratios (ORs) and absolute measures of association as adjusted risk increases (RIs). RESULTS: Among the 39 000 households selected for recruitment for the survey, 17 089 respondents provided complete data (43.8%) and our weighted analysis represented 27 808 081 Canadians aged 15 years and older. An estimated 18.5% of respondents (95% confidence interval [CI] 17.6%-19.5%) indicated they intended to try or increase cannabis use following legalization. Being more likely to try or increase cannabis use was associated with younger age (15-24 yr v. ≥ 65 yr; adjusted OR 3.8, 95% CI 2.6-5.6; adjusted RI 20.1%, 95% CI 13.9%-26.2%), cannabis use in the past 3 months versus no use (adjusted OR 3.3, 95% CI 2.8-3.9; adjusted RI 20.4%, 95% CI 17.1%-23.6%), higher income (≥ $80 000 v. < $40 000; adjusted OR 1.5, 95% CI 1.3-1.9; adjusted RI 6.1%, 95% CI 3.2%-9.0%) and poor or fair mental health versus good to excellent mental health (adjusted OR 2.0, 95% CI 1.6-2.6; adjusted RI 11.5%, 95% CI 6.7%-16.2%). INTERPRETATION: Nearly 1 in 5 respondents reported that they intended to try or increase cannabis use after legalization; however, intention may not translate into behaviour. Continued monitoring should help to establish rates and patterns of cannabis use among Canadians following legalization. Copyright 2019, Joule Inc. or its licensors.
BACKGROUND: The Government of Canada legalized nonmedical use of cannabis in October 2018. Our objectives were to determine the percentage of Canadians intending to try or increase their cannabis use following legalization and to explore characteristics associated with this intent. METHODS: We used data from the 2018 National Cannabis Survey and constructed multivariable regression models. Respondents' data were weighted and bootstrapped. We report relative measures of association as adjusted odds ratios (ORs) and absolute measures of association as adjusted risk increases (RIs). RESULTS: Among the 39 000 households selected for recruitment for the survey, 17 089 respondents provided complete data (43.8%) and our weighted analysis represented 27 808 081 Canadians aged 15 years and older. An estimated 18.5% of respondents (95% confidence interval [CI] 17.6%-19.5%) indicated they intended to try or increase cannabis use following legalization. Being more likely to try or increase cannabis use was associated with younger age (15-24 yr v. ≥ 65 yr; adjusted OR 3.8, 95% CI 2.6-5.6; adjusted RI 20.1%, 95% CI 13.9%-26.2%), cannabis use in the past 3 months versus no use (adjusted OR 3.3, 95% CI 2.8-3.9; adjusted RI 20.4%, 95% CI 17.1%-23.6%), higher income (≥ $80 000 v. < $40 000; adjusted OR 1.5, 95% CI 1.3-1.9; adjusted RI 6.1%, 95% CI 3.2%-9.0%) and poor or fair mental health versus good to excellent mental health (adjusted OR 2.0, 95% CI 1.6-2.6; adjusted RI 11.5%, 95% CI 6.7%-16.2%). INTERPRETATION: Nearly 1 in 5 respondents reported that they intended to try or increase cannabis use after legalization; however, intention may not translate into behaviour. Continued monitoring should help to establish rates and patterns of cannabis use among Canadians following legalization. Copyright 2019, Joule Inc. or its licensors.
Authors: Zach Walsh; Robert Callaway; Lynne Belle-Isle; Rielle Capler; Robert Kay; Philippe Lucas; Susan Holtzman Journal: Int J Drug Policy Date: 2013-09-09
Authors: Marta Di Forti; Hannah Sallis; Fabio Allegri; Antonella Trotta; Laura Ferraro; Simona A Stilo; Arianna Marconi; Caterina La Cascia; Tiago Reis Marques; Carmine Pariante; Paola Dazzan; Valeria Mondelli; Alessandra Paparelli; Anna Kolliakou; Diana Prata; Fiona Gaughran; Anthony S David; Craig Morgan; Daniel Stahl; Mizanur Khondoker; James H MacCabe; Robin M Murray Journal: Schizophr Bull Date: 2013-12-17 Impact factor: 9.306
Authors: Erik von Elm; Douglas G Altman; Matthias Egger; Stuart J Pocock; Peter C Gøtzsche; Jan P Vandenbroucke Journal: PLoS Med Date: 2007-10-16 Impact factor: 11.069
Authors: Alexandra M E Zuckermann; Katelyn V Battista; Richard E Bélanger; Slim Haddad; Alexandra Butler; Mary Jean Costello; Scott T Leatherdale Journal: Prev Med Rep Date: 2021-03-11
Authors: Dafna Sara Rubin-Kahana; Jean-François Crépault; Justin Matheson; Bernard Le Foll Journal: Front Psychiatry Date: 2022-09-23 Impact factor: 5.435