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Nigatu YT, Imtiaz S, Elton-Marshall T, Rueda S, Hamilton HA. Changes in modes of cannabis consumption pre- and post-legalization and their correlates among adults in Ontario, Canada: 2017-2022. THE AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE 2024:1-9. [PMID: 39042877 DOI: 10.1080/00952990.2024.2369905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 06/15/2024] [Indexed: 07/25/2024]
Abstract
Background: Despite an increase in the varieties of cannabis products available for consumption, limited evidence is available about the patterns of cannabis consumption methods before and after legalization.Objectives: To examine the changes in modes of cannabis use and their correlates among adults in Ontario, Canada both prior to and following cannabis legalization in 2018.Methods: Data were utilized from the 2017 to 2022 Centre for Addiction and Mental Health's (CAMH) Monitor study, a repeated cross-sectional survey of adults 18 years of age and older (n = 2,665; 56% male). The surveys employed a regionally stratified sampling design using computer-assisted telephone interviews and web surveys. Multinomial regression was performed to examine different modes of cannabis use.Results: The exclusive use of cannabis through ingestion methods increased from 4.0% in 2017 to 16.6% in 2022 (p < .001). However, the exclusive use of inhalation-based cannabis decreased from 49.4% in 2017 to 25.5% in 2022 (p < .001). Relative to inhalation-based modes, adults were about five times more likely to use ingestion-based modes in 2020 [RRR = 4.65 (2.94-7.35)] and 2022 [RRR = 4.75 (2.99-7.55)] than in 2019, after accounting for sociodemographic factors.Conclusions: Ingestion-based cannabis use among adults increased fourfold between 2017 and 2022, a period during which recreational cannabis use was legalized in Canada. The increase was especially evident after the legalization of cannabis edibles.
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Affiliation(s)
- Yeshambel T Nigatu
- Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Sameer Imtiaz
- Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Tara Elton-Marshall
- Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, ON, Canada
- School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Sergio Rueda
- Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, ON, Canada
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Hayley A Hamilton
- Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, ON, Canada
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
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Jablonska B, Negura L. Navigating the Grey Zone: The Impact of Legislative Frameworks in North America and Europe on Adolescent Cannabis Use-A Systematic Review. Behav Sci (Basel) 2024; 14:484. [PMID: 38920816 PMCID: PMC11200412 DOI: 10.3390/bs14060484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 05/31/2024] [Accepted: 06/04/2024] [Indexed: 06/27/2024] Open
Abstract
OBJECTIVES This paper aims to systematically review the impact of legislative framework changes in North America and Europe on adolescent cannabis use. It not only seeks to examine the prevalence of adolescent marijuana use following legislative changes but also to identify the driving forces behind fluctuations in use and to address the gaps left by previous studies. METHODS A systematic literature review was conducted in selected databases. After screening English-language publications dating from 2013 to 2023 (n = 453 studies), 24 met the inclusion criteria. Articles were considered if they analyzed the impact of legislative changes on adolescent cannabis use in countries across North America and Europe. SYNTHESIS The overall findings suggest an inconsistency regarding the prevalence of cannabis use among youth and adolescents following policy changes. The effects of modifications in cannabis policies on marijuana consumption are complex and influenced by various factors. These include the details of legislation, societal perspectives, enforcement methods, socioeconomic status, and cultural background. CONCLUSIONS The results of this analysis reveal a nuanced reality. Although research suggests a rise in cannabis use after legalization, there are variations in the outcomes observed. This highlights the significance of considering context and demographics. Moreover, studies shed light on how specific policy changes, such as depenalization, can affect cannabis use.
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Affiliation(s)
| | - Lilian Negura
- School of Social Work, Faculty of Social Sciences, University of Ottawa, 120, University Private, Ottawa, ON K1N 6N5, Canada;
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Leatherdale ST, Amores A, Bélanger RE, Battista K, Patte KA, Jiang Y. Youth perception of difficulty accessing cannabis following cannabis legalization and during the early and ongoing stages of the COVID-19 pandemic: repeat cross-sectional and longitudinal data from the COMPASS study. Arch Public Health 2023; 81:214. [PMID: 38102693 PMCID: PMC10724956 DOI: 10.1186/s13690-023-01224-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 11/27/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND Very little research has examined how perceptions of cannabis access among underage youth in Canada have changed since cannabis was legalized and since the onset of the COVID-19 pandemic. As such, this paper examines the effect of the early and ongoing stages of the COVID-19 pandemic period on youth perceptions of cannabis access over time since the onset of the Cannabis Act in 2018 in a large sample of Canadian youth. METHODS Using data from the COMPASS study (T1:2018/19, T2:2019/20, T3:2020/21), we used both repeat cross-sectional data [T1 (n = 38,890), T2 (n = 24,109), and T3 (n = 22,795)] to examine overall trends in perceptions of cannabis access, and sequential cohort longitudinal data [n = 4,677 students linked from T1 to T3] to examine the differential changes in perceptions of cannabis access among students over time. RESULTS In the cross-sectional sample, the frequency of students reporting that cannabis was easy to access decreased by 26.7% from T1 (51.0%) to T3 (37.4%), although respondents who have used cannabis were more likely to report access was easy. In the longitudinal sample, perceptions of cannabis access being easy increased over time, especially among cannabis users. Perceived ease of access appears to have been slightly impeded during the initial pandemic period but rebounded during the ongoing pandemic period. CONCLUSIONS While the prevalence of youth reporting that cannabis is easy to access has declined since legalization and throughout the early and ongoing pandemic periods, a substantial number of underage youth continue to report that cannabis is easy to access. This suggest that there is an ongoing need for continued cannabis control efforts to address this issue.
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Affiliation(s)
- Scott T Leatherdale
- School of Public Health Sciences, University of Waterloo, 200 University Avenue, Waterloo, ON, N2L 3G1, Canada.
| | - Angelica Amores
- School of Public Health Sciences, University of Waterloo, 200 University Avenue, Waterloo, ON, N2L 3G1, Canada
| | - Richard E Bélanger
- VITAM - Centre de Recherche en Santé Durable, Université Laval, Quebec City, Canada
- Department of Pediatrics, Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Kate Battista
- School of Public Health Sciences, University of Waterloo, 200 University Avenue, Waterloo, ON, N2L 3G1, Canada
| | - Karen A Patte
- Department of Health Sciences, Faculty of Applied Health Sciences, Brock University, St. Catherines, Canada
| | - Ying Jiang
- Applied Research Division, Public Health Agency of Canada, Ottawa, Canada
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Doggett A, Belisario K, McDonald AJ, Ferro MA, Murphy JG, MacKillop J. Cannabis Use Frequency and Cannabis-Related Consequences in High-Risk Young Adults Across Cannabis Legalization. JAMA Netw Open 2023; 6:e2336035. [PMID: 37755827 PMCID: PMC10534274 DOI: 10.1001/jamanetworkopen.2023.36035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 08/22/2023] [Indexed: 09/28/2023] Open
Abstract
Importance A key concern about recreational cannabis legalization is increases in use and adverse consequences, particularly among young adults (aged 18-29 years) who have the highest prevalence of cannabis use, and especially in higher-risk, more vulnerable young adults. However, few longitudinal studies have examined patterns of cannabis consumption in high-risk young adults over the course of legalization. Objective To examine changes in cannabis use frequency and cannabis-related consequences over recreational cannabis legalization in Canada in a longitudinal sample of high-risk young adults. Design, Setting, and Participants Longitudinal observational cohort study following young adults in Ontario, Canada, aged 19.5 to 23.0 years who reported regular heavy episodic drinking (65% past-month cannabis use) at enrollment. Participants were surveyed every 4 months for 3 years between February 2017 and February 2020 (3 prelegalization waves, 4 postlegalization waves). Data were analyzed from March to May 2023. Exposures Recreational cannabis legalization in Canada and 4 potential moderators of change: sex, income, education, and prelegalization cannabis use frequency. Main Outcomes and Measures Cannabis use frequency and cannabis-related adverse consequences. Results In a cohort of 619 high-risk young adults (baseline mean [SD] age, 21.0 [1.2] years; 346 female participants [55.9%]), omnibus model testing revealed significant overall decreases in both cannabis use frequency (F = 2.276, 3000.96; P = .03) and cannabis-related consequences (F = 10.436, 3002.21; P < .001) over time, but these changes were substantially moderated by prelegalization frequency (frequency: F = 7.5224, 3021.88; P < .001; consequences: F = 7.2424, 2986.98; P < .001). Follow-up tests showed individuals who used cannabis more frequently prelegalization significantly decreased their use and cannabis-related consequences postlegalization. In contrast, individuals who did not use cannabis prelegalization exhibited a small magnitude increase in frequency over time but nonsignificant changes in cannabis-related consequences. Sex, income, and education did not moderate changes over time. Conclusions and Relevance In this cohort study of high-risk young adults, individuals using cannabis frequently prelegalization showed significant reductions in use and consequences over time, reflecting an aging out pattern. Small increases in use among participants with no prelegalization use were observed over time, but without parallel changes in cannabis-related consequences. The results did not reveal substantive adverse near-term outcomes across the legalization period, although a within-participants design cannot rule out the possibility of alternative trajectories in the absence of legalization.
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Affiliation(s)
- Amanda Doggett
- Peter Boris Centre for Addictions Research/Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University/St. Joseph’s Healthcare, Hamilton, Ontario, Canada
| | - Kyla Belisario
- Peter Boris Centre for Addictions Research/Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University/St. Joseph’s Healthcare, Hamilton, Ontario, Canada
| | - André J. McDonald
- Peter Boris Centre for Addictions Research/Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University/St. Joseph’s Healthcare, Hamilton, Ontario, Canada
| | - Mark A. Ferro
- School of Public Health Sciences, University of Waterloo, Waterloo, Ontario, Canada
| | - James G. Murphy
- Department of Psychology, The University of Memphis, Memphis, Tennessee
| | - James MacKillop
- Peter Boris Centre for Addictions Research/Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University/St. Joseph’s Healthcare, Hamilton, Ontario, Canada
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Kourgiantakis T, Lee E, Kosar AKT, Tait C, Lau CKY, McNeil S, Craig S, Ashcroft R, Williams CC, Goldstein AL, Chandrasekera U, Sur D, Henderson JL. Youth cannabis use in Canada post-legalization: service providers' perceptions, practices, and recommendations. Subst Abuse Treat Prev Policy 2023; 18:36. [PMID: 37349741 PMCID: PMC10288694 DOI: 10.1186/s13011-023-00550-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/16/2023] [Indexed: 06/24/2023] Open
Abstract
BACKGROUND In 2018, Canada legalized recreational cannabis use with the purpose of protecting youth and restricting access. However, concerns have been raised that this objective has not been met as rates of cannabis use among youth aged 16-24 have not declined. Youth cannabis use is associated with various adverse effects including psychosis, anxiety, depression, suicidality, respiratory distress, cannabinoid hyperemesis syndrome, and intoxications. Service providers play a crucial role in addressing youth cannabis use. This study aimed to understand Ontario service providers' perceptions, practices, and recommendations on youth cannabis use. METHODS This mixed method study included a survey and two focus groups. The survey was distributed to mental health service providers serving youth aged 16-24 across Ontario who were given the option to participate in a focus group. The survey included closed and open-ended questions regarding perceptions, practices, and recommendations, while the focus groups explored these categories in greater depth. Descriptive statistics were used to analyze close-ended questions and interpretative content analysis was applied for open-ended questions. Focus group data were analyzed using thematic analysis. RESULTS The survey was completed by 160 service providers and 12 participated in two focus groups. Regarding perceptions, 60% of survey participants agreed with legalization, 26% had a strong understanding of medical versus recreational cannabis, 84% believed that cannabis has physical and mental health risks, and 49% perceived stigmatization. Less than half of the survey participants reported screening or assessing cannabis use, 16% stated they are highly familiar with treating cannabis use, and 67% reported that they rarely work with families. Subthemes identified in the focus groups under perceptions included normalization and stigmatization, harms for youth, and stigma, racism, and discrimination. Subthemes under practice included cannabis not being the primary focus, challenges with screening, assessment, and intervention, and referral to specialized services. Both the survey and focus group participants recommended increasing public education, enhancing service provider training, improving regulation and policies, reducing stigma and minimization, improving service access, and providing more culturally responsive services. CONCLUSION Youth cannabis use in Canada remains a significant public health concern, necessitating a more comprehensive plan to protect Ontario youth and reduce associated harms.
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Affiliation(s)
- Toula Kourgiantakis
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada.
| | - Eunjung Lee
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - A Kumsal Tekirdag Kosar
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - Christine Tait
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - Carrie K Y Lau
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - Sandra McNeil
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - Shelley Craig
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - Rachelle Ashcroft
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - Charmaine C Williams
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - Abby L Goldstein
- Department of Applied Psychology and Human Development, Ontario Institute for Studies in Education, Toronto, ON, Canada
| | - Uppala Chandrasekera
- Factor-Inwentash Faculty of Social Work, University of Toronto, 246 Bloor Street West, Toronto, ON, M5S 1V4, Canada
| | - Deepy Sur
- Ontario Association of Social Workers (OASW), Toronto, ON, Canada
| | - J L Henderson
- Margaret and Wallace McCain Centre for Child, Youth and Family Mental Health, Department of Psychiatry, Centre for Addiction and Mental Health (CAMH), University of Toronto, Toronto, ON, Canada
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Benny C, Steele BJ, Patte KA, Leatherdale ST, Pabayo R. Income inequality and daily use of cannabis, cigarettes, and e-cigarettes among Canadian secondary school students: Results from COMPASS 2018-19. THE INTERNATIONAL JOURNAL OF DRUG POLICY 2023; 115:104014. [PMID: 37003193 DOI: 10.1016/j.drugpo.2023.104014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 02/24/2023] [Accepted: 03/16/2023] [Indexed: 04/03/2023]
Abstract
INTRODUCTION Cannabis, cigarette, and e-cigarette use among Canadian adolescents is a major public health concern. Income inequality has been associated with adverse mental health among youth and may contribute to the risk of frequent cannabis, cigarette, and e-cigarette use. We tested the association between income inequality and the risk of daily cannabis, cigarette, and e-cigarette use among Canadian secondary school students. METHODS We used individual-level survey data from Year 6 (2018/19) of Cannabis, Obesity, Mental health, Physical activity, Alcohol use, Smoking, and Sedentary Behavior (COMPASS) and area-level data from the 2016 Canadian Census. Three-level logistic models were used to assess the relationship between income inequality and adolescent daily and current cannabis use, cigarette smoking, and e-cigarette use. RESULTS The analytic sample included 74,501 students aged 12-19. Students were most likely to report being male (50.4%), white (69.1%), and having weekly spending money over $100 (23.5%). We found that a standard deviation unit increase in Gini coefficient was significantly associated with increased likelihood of daily cannabis use (OR=1.25, 95% CI = 1.01-1.54) when adjusting for relevant covariates. We found no significant relationship between income inequality and daily smoking. While Gini was not significantly associated with daily e-cigarette use, we observed a significant interaction between Gini and gender (OR=0.87, 95% CI= 0.80-0.94), indicating that increased income inequality was associated with higher risk of reporting daily e-cigarette use among females only. DISCUSSION An association between income inequality and the likelihood of reporting daily cannabis use across all students and daily e-cigarette use in females were observed. Schools in higher income inequality areas may benefit from targeted prevention and harm reduction programs. Results emphasize the need for upstream discussion on policies that can mitigate the potential effects income inequality.
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Affiliation(s)
- Claire Benny
- 3-300 Edmonton Clinic Health Academy, University of Alberta School of Public Health, 11405-87 Ave, T6G 1C9 Edmonton, Alberta, Canada.
| | - Brian J Steele
- 3-300 Edmonton Clinic Health Academy, University of Alberta School of Public Health, 11405-87 Ave, T6G 1C9 Edmonton, Alberta, Canada
| | - Karen A Patte
- Brock University Department of Health Sciences, 1812 Sir Isaac Brock Way, L2S 3A1 St. Catharines, Ontario, Canada
| | - Scott T Leatherdale
- University of Waterloo School of Public Health Sciences, 200 University Ave West, TJB 2317, N2L 3G1 Waterloo, Ontario, Canada
| | - Roman Pabayo
- 3-300 Edmonton Clinic Health Academy, University of Alberta School of Public Health, 11405-87 Ave, T6G 1C9 Edmonton, Alberta, Canada
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Boury H, Hall W, Fischer B. Developments and Changes in Primary Public Health Outcome Indicators Associated with the Legalization of Non-Medical Cannabis Use and Supply in Canada (2018): A Comprehensive Overview. Int J Ment Health Addict 2022:1-15. [PMID: 36589471 PMCID: PMC9794107 DOI: 10.1007/s11469-022-00986-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/05/2022] [Indexed: 12/28/2022] Open
Abstract
Canada legalized non-medical cannabis use and supply for adults in 2018. We examined developments and changes associated with the legalization policy reform on key indicators for public health, namely cannabis (including frequent/problematic) use prevalence, cannabis-related hospitalizations, cannabis-impaired driving, and cannabis sourcing. We identified peer-reviewed and "grey" study data that featured population-level or other quasi-representative samples and comparable outcome data for pre- and post-legalization periods, including possible trends of changes over time. Cannabis use has increased in select population groups, with use modes shifting away from smoking. Evidence on cannabis-related hospitalizations (e.g., for mental health) is mixed. The prevalence of cannabis-impaired driving appears to be generally steady but THC exposure among crash-involved drivers may have increased. Increasing proportions of users obtain cannabis products from legal sources but some-especially regular-users continue to use illicit sources. Overall, data suggest a mixed and inconclusive picture on cannabis legalization's impacts on essential public health indicators, including select extensions in trends from pre-legalization.
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Affiliation(s)
- Himani Boury
- Faculty of Health Sciences, Centre for Applied Research in Mental Health and Addiction, Simon Fraser University, Suite 2400, 515 W. Hastings Street, Vancouver, BC V6B 5K3 Canada
- School of Public Health, Queens University, Kingston, Canada
| | - Wayne Hall
- Faculty of Health and Behavioural Sciences, National Centre for Youth Substance Use Research, University of Queensland, 17 Upland Road, St Lucia, Australia
| | - Benedikt Fischer
- Faculty of Health Sciences, Centre for Applied Research in Mental Health and Addiction, Simon Fraser University, Suite 2400, 515 W. Hastings Street, Vancouver, BC V6B 5K3 Canada
- School of Population Health, University of Auckland, 85 Park Road, Auckland, New Zealand
- Department of Psychiatry, Federal University of Sao Paulo, R. Sena Madureira, São Paulo, 1500 Brazil
- Department of Psychiatry, University of Toronto, 250 College Street, Toronto, ON M5S2S1 Canada
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Abstract
Purpose of Review The purpose of this review was to describe the state-of-the-literature on research specific to cannabis vaping among youth and young adults. Recent Findings Out of 1801 records identified, a total of 202 articles met eligibility criteria for inclusion in this review. Most of this literature (46.0% of studies) was specific to the health effects of cannabis vaping, particularly EVALI (e-cigarette and vaping associated lung injury). Other research areas identified in the review included the etiology (24.3%) and epidemiology (24.8%) of cannabis vaping, in addition to articles on regulation (8.4%) and marketing (5.5%) of the same. Summary Cannabis vaping is increasingly common among youth and young adults and more prevalent is settings where recreational use for adults has been legalized. The literature documents a number of negative health effects of cannabis vaping for young people, along with risk factors and reasons for the same. Supplementary Information The online version contains supplementary material available at 10.1007/s40429-022-00413-y.
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