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Updated: Jul 5, 2026
07:30
Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
Published on: August 18, 2020
Cannabis use and later life outcomes
David M Fergusson1, Joseph M Boden
1University of Otago, Christchurch School of Medicine and Health Sciences, New Zealand. dm.fergusson@otago.ac.nz
Addiction (Abingdon, England)
|May 17, 2008
Summary
Increased cannabis use in adolescence and young adulthood is linked to poorer educational attainment, lower income, and reduced life satisfaction. These findings highlight the adverse outcomes associated with heavy cannabis consumption.
Area of Science:
- Psychology
- Sociology
- Public Health
Background:
- Adolescent and young adult cannabis use is a significant public health concern.
- Understanding the long-term consequences of cannabis use is crucial for prevention and intervention strategies.
Purpose of the Study:
- To investigate the associations between the extent of cannabis use during adolescence and young adulthood and subsequent life outcomes.
- To examine the impact of cannabis consumption on education, economic status, employment, relationship satisfaction, and life satisfaction.
Main Methods:
- A longitudinal study followed a New Zealand birth cohort until age 25.
- Data collected included cannabis use frequency, educational attainment, income, welfare dependence, unemployment, relationship quality, and life satisfaction.
- Statistical analyses adjusted for numerous potential confounding factors, including socio-economic background, family adversity, and mental health.
Main Results:
- Significant associations were found between higher levels of cannabis use (ages 14-21) and poorer outcomes by age 25.
- These included lower university degree attainment, reduced income, increased welfare dependence, higher unemployment rates, and lower relationship and life satisfaction.
- These associations remained statistically significant after adjusting for confounding variables.
Conclusions:
- Increasing cannabis use in late adolescence and early adulthood is associated with a range of adverse outcomes.
- Heavy cannabis use is linked to poorer educational and economic prospects, as well as diminished relationship and life satisfaction.
- The findings contribute to the evidence base on the negative consequences of substantial cannabis consumption.
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