When Average Cannabis Use Goes Up Among Teens, Heavy Use Goes Up Too
Adolescent cannabis use in Sweden follows the total consumption model: when average use rises across the population, heavy use rises proportionally.
Quick Facts
What This Study Found
The distribution of cannabis use frequency among Swedish adolescents remained remarkably stable over 33 years, and increases in average use were consistently associated with proportional increases in high-frequency users.
Key Numbers
A 1 percentage point increase in average frequency of use was associated with a 1.794 percentage point increase in high-frequency users among 9th graders (p < 0.001). The elasticity for the median user (P50) was 0.914.
How They Did This
Researchers analyzed annual surveys of Swedish 9th-grade (n=180,059) and high school students (n=80,925) from 1990 to 2023 using Lorenz curves, Gini coefficients, and regression analysis to test whether cannabis use follows the total consumption model.
Why This Research Matters
This has major implications for cannabis policy. If the total consumption model applies, then any policy that increases average cannabis use among adolescents will inevitably increase the number of heavy users, not just casual experimenters.
The Bigger Picture
The total consumption model is well established for alcohol but had never been tested for cannabis. Finding that it applies suggests population-level prevention strategies that reduce average use could be more effective than targeting only heavy users.
What This Study Doesn't Tell Us
Based on Swedish adolescents only, where cannabis use levels are relatively low compared to North America. Self-reported frequency may underestimate actual use. The model may not apply in settings with very different use patterns.
Questions This Raises
- ?Does this model hold in countries with legal cannabis markets and higher baseline use?
- ?Could targeted interventions for heavy users still be effective even if the population-level relationship holds?
Trust & Context
- Key Stat:
- 1 point rise in average use = 1.8 point rise in heavy users
- Evidence Grade:
- Published in Addiction with over 260,000 respondents across 33 years of consistent survey methodology.
- Study Age:
- 2026 study analyzing trends through 2023.
- Original Title:
- Does the total consumption model apply to cannabis use?
- Published In:
- Addiction (Abingdon, England) (2026)
- Authors:
- Norström, Thor(2), Leifman, Håkan
- Database ID:
- RTHC-08523
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
What is the total consumption model?
A theory from alcohol research stating that when average consumption in a population rises, all levels of use rise proportionally, including the most harmful heavy use.
What does this mean for cannabis legalization?
It suggests that policies increasing average cannabis use among teens would also increase the number of heavy teen users, making population-level prevention important.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-08523APA
Norström, Thor; Leifman, Håkan. (2026). Does the total consumption model apply to cannabis use?. Addiction (Abingdon, England). https://doi.org/10.1111/add.70353
MLA
Norström, Thor, et al. "Does the total consumption model apply to cannabis use?." Addiction (Abingdon, 2026. https://doi.org/10.1111/add.70353
RethinkTHC
RethinkTHC Research Database. "Does the total consumption model apply to cannabis use?" RTHC-08523. Retrieved from https://rethinkthc.com/research/norstrom-2026-does-the-total-consumption
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.