Related Experiment Video
Updated: Jul 6, 2025

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
Published on: August 18, 2020
Youth cannabis use and subsequent health service use for mood and anxiety disorders: A population-based cohort study
André J McDonald1, Paul Kurdyak2, Jürgen Rehm3
1Epidemiology Division, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada; Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Peter Boris Centre for Addictions Research, St. Joseph's Healthcare Hamilton, Hamilton, Ontario, Canada; Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada; Michael G. DeGroote Centre for Medicinal Cannabis Research, McMaster University, Hamilton, Ontario, Canada.
Abstract:
Epidemiologic research suggests a modest association between youth cannabis use and mood and anxiety disorders (MADs). However, current evidence is based mostly on cohort studies using data from the 20th century when cannabis was significantly less potent than today. We linked population-based survey data from 2009 to 2012 with administrative records of health services covered under universal healthcare up to 2017. The cohort included youth aged 12 to 24 years at baseline living in Ontario, Canada with no prior MAD health service use (n = 8,252). We conducted a multivariable Cox model to estimate the association between cannabis use frequency (never,
Related Concept Videos
Stress and Mental Health
Individuals with depression often experience challenges in both their personal and professional...
Substance Use Disorders Affecting Sleep
Understanding the concepts of physical dependence,...
Stress Prevention and Stress Management Techniques IV
Psychological and Sociocultural Causes of Schizophrenia
Human Genetics
The complex relationship between genetics and psychology is observable through common biological components such...
Attention-Deficit/Hyperactivity Disorder
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings....

