The effect of non-medical cannabis retailer proximity on use of mental health services for psychotic disorders in Ontario, Canada-Reference-Cited by-同舟云学术

The effect of non-medical cannabis retailer proximity on use of mental health services for psychotic disorders in Ontario, Canada

Published:2023-10-27 Issue: Volume: Page:
ISSN:0020-7640
Container-title:International Journal of Social Psychiatry
language:en
Short-container-title:Int J Soc Psychiatry

Author:

Wootten Jared C¹,Rodrigues Rebecca¹,Gilliland Jason¹²³⁴,Carter Brooke⁵,Shariff Salimah Z⁴⁵⁶,Zhong Shiran³,Archie Suzanne⁷,Edwards Jordan⁷,Elton-Marshall Tara¹⁸⁹¹⁰,Myran Daniel Thomas¹¹¹²¹³,Palaniyappan Lena¹⁴¹⁵,Perlman Christopher M¹⁶,Seabrook Jamie A¹²⁴¹⁷^ORCID,Murray Robin M¹⁸,Anderson Kelly K¹⁴⁵¹⁴^ORCID

Affiliation:

1. Department of Epidemiology and Biostatistics, Western University, London, ON, Canada

2. Department of Pediatrics, Western University, London, ON, Canada

3. Department of Geography and Environment, Western University, London, ON, Canada

4. Lawson Health Research Institute, London Health Sciences Centre, ON, Canada

5. ICES Western, London, ON, Canada

6. Department of Nursing, Western University, London, ON, Canada

7. Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, ON, Canada

8. School of Epidemiology and Public Health, University of Ottawa, ON, Canada

9. Institute of Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, ON, Canada

10. Dalla Lana School of Public Health, University of Toronto, ON, Canada

11. Department of Family Medicine, University of Ottawa, ON, Canada

12. Clinical Epidemiology Program, Ottawa Hospital Research Institute, ON, Canada

13. ICES uOttawa, Ottawa Hospital Research Institute, ON, Canada

14. Department of Psychiatry, Western University, London, ON, Canada

15. Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, PQ, Canada

16. School of Public Health Sciences, University of Waterloo, ON, Canada

17. School of Food and Nutritional Sciences, Brescia University College, London, ON, Canada

18. Institute of Psychiatry, Psychology, and Neuroscience, King’s College London, UK

Abstract

Background: Cannabis is associated with the onset and persistence of psychotic disorders. Evidence suggests that accessibility of substances is associated with an increased risk of use-related harms. We sought to examine the effect of residing in proximity to non-medical cannabis retailers on the prevalence of health service use for psychosis. Methods: We conducted a cross-sectional study using linked health administrative data, and used geospatial analyses to determine whether people in Ontario, Canada (aged 14–60 years) resided within walking (1.6 km) or driving (5.0 km) distance of non-medical cannabis retailers (open as of February-2020). We identified outpatient visits, emergency department (ED) visits, and hospitalizations for psychotic disorders between 01-April-2019 and 17-March-2020. We used zero-inflated Poisson regression models and gamma generalized linear models to estimate the association between cannabis retailer proximity and indicators of health service use. Results: Non-medical cannabis retailers were differentially located in areas with high levels of marginalization and pre-existing health service use for psychosis. People residing within walking or driving distance of a cannabis retailer had a higher rate of psychosis-related outpatient visits, ED visits, and hospitalizations, compared to people living outside these areas. This effect was stronger among those with no prior service use for psychosis. Conclusions: Proximity to a non-medical cannabis retailer was associated with higher health service use for psychosis, even after adjustment for prior health service use. These findings suggest that opening of non-medical cannabis retailers could worsen the burden of psychosis on mental health services in areas with high-risk populations.

Funder

Mental Health Commission of Canada

Institute of Neurosciences, Mental Health and Addiction

Publisher

SAGE Publications

Subject

Psychiatry and Mental health

Link

http://journals.sagepub.com/doi/pdf/10.1177/00207640231206053

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