Observational studyCanadian journal of psychiatry. Revue canadienne de psychiatrie2021
The Potential Impact of Recreational Cannabis Legalization on the Prevalence of Cannabis Use Disorder and Psychotic Disorders: A Retrospective Observational Study.
Observational study in Canadian journal of psychiatry. Revue canadienne de psychiatrie, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
14 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.
- The implementation and public health impacts of cannabis legalization in Canada: a systematic review.Addiction (Abingdon, England) · 2023Pooled it
- Emergency department use by individuals with and without psychosis after state-level cannabis legalization and commercialization.Nature. Mental health · 2026Article
- Cannabis and psychosis: minimising harm while maximising therapeutic potential.The British journal of psychiatry : the journal of mental science · 2026Article
- Exploring the impact of drug decriminalization and legalization policies on mental health outcomes: A scoping review.PLOS mental health · 2025Article
- Changes in cannabis use post decriminalisation in mental health care users in South Africa.The South African journal of psychiatry : SAJP : the journal of the Society of Psychiatrists of South Africa · 2025Article
- Reducing the harms of cannabis use in youth post-legalization: insights from Ontario youth, parents, and service providers.Harm reduction journal · 2024Article
- Effect of Cannabis Legalization in Canada on the Incidence of Psychosis Consultations in Quebec City's Psychiatric Emergency Services.Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2024Article
- Understanding youth and young adult cannabis use in Canada post-legalization: a scoping review on a public health issue.Substance abuse treatment, prevention, and policy · 2024Article
- Global epidemiology of cannabis use disorders and its trend from 1990 to 2019: Benchmarking analysis of the global burden of disease study.Journal of family medicine and primary care · 2024Article
- Youth cannabis use in Canada post-legalization: service providers' perceptions, practices, and recommendations.Substance abuse treatment, prevention, and policy · 2023Article
- Impacts of recreational cannabis legalization on use and harms: A narrative review of sex/gender differences.Frontiers in psychiatry · 2023Review
- 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.International journal of mental health and addiction · 2022Article
- Associations Between Canada's Cannabis Legalization and Emergency Department Presentations for Transient Cannabis-Induced Psychosis and Schizophrenia Conditions: Ontario and Alberta, 2015-2019.Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2022Article
- The impact of cannabis legalization for recreational purposes on youth: A narrative review of the Canadian experience.Frontiers in psychiatry · 2022Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesThe principal objective of our study was to document the short-term impact of the legalization of recreational cannabis on active cannabis use, cannabis use disorder, and various psychotic disorders.
methodsWe carried out a retrospective observational study of patients who were at least 12 years old and who had visited a psychiatrist in the emergency unit of the
resultsWe examined consultations in patients over 18 years old in prelegalization (
conclusionAlthough an affirmative conclusion is tentative, the current findings suggest a first link between the legalization of cannabis in Canada and increased diagnoses of cannabis use disorder, as well as cannabis use in general among patients in a university hospital psychiatric emergency department.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.