After legalization, teen cannabis treatment admissions dropped even as risk factors increased
Recreational cannabis legalization broke the link between perceiving cannabis as low-risk and entering treatment: teens used more cannabis but sought less treatment, suggesting legalization changes social norms around treatment-seeking.
Quick Facts
What This Study Found
Before legalization, perceiving cannabis as low-risk predicted more use, which predicted more CUD treatment admissions. After legalization, the perception-to-use link strengthened but the use-to-treatment link was suppressed. The indirect effect of low-risk perception on treatment admissions via cannabis use existed before legalization but disappeared after.
Key Numbers
542 state-year observations from 2008-2019. Positive indirect effect of low-risk perception on CUD treatment via cannabis use before legalization, but not after. Legalization strengthened perception-to-use pathway and suppressed use-to-treatment pathway.
How They Did This
Two-way fixed effects (state and year) moderated mediation model using NSDUH and TEDS-A data from 2008-2019 (542 state-year observations) examining adolescents aged 12-17 across US states.
Why This Research Matters
Declining teen treatment admissions after legalization could be misread as declining need. This study suggests the decline reflects changing social norms and self-medication patterns, not less problematic use, meaning more teens with CUD may be going untreated.
The Bigger Picture
Legalization creates a paradox for adolescent health: it increases cannabis use while simultaneously making treatment feel less necessary. Without proactive outreach, a growing population of teens with problematic use may never connect with treatment services.
What This Study Doesn't Tell Us
State-level prevalence data cannot capture individual-level pathways. Cannot distinguish between voluntary and mandated treatment admissions (legal referrals may decline with legalization). 2008-2019 data precedes the most recent legalization wave.
Questions This Raises
- ?Are teens with CUD in legalized states going untreated at higher rates?
- ?Would school-based screening programs counteract the decline in treatment-seeking after legalization?
Trust & Context
- Key Stat:
- between teen cannabis use and treatment admissions after recreational legalization, even as use increased
- Evidence Grade:
- Large national dataset with sophisticated mediation model and state/year fixed effects. Ecological design (state-level data) limits individual-level inference.
- Study Age:
- 2024 publication using 2008-2019 data.
- Original Title:
- Why Are Adolescent Cannabis Use Disorder Treatment Admissions Declining in the US? The Mediated Pathway of State Treatment Admissions Rates before and after Recreational Cannabis Legalization.
- Published In:
- Substance use & misuse, 59(6), 962-970 (2024)
- Authors:
- Mennis, Jeremy(6), Stahler, Gerald J(3), Coffman, Donna L
- Database ID:
- RTHC-05545
Evidence Hierarchy
Follows a group of people over time to track how outcomes develop.
What do these levels mean? →Frequently Asked Questions
Why would treatment admissions drop if use is increasing?
Legalization may normalize cannabis use, making teens and families less likely to view heavy use as a problem requiring treatment. Court-mandated referrals also decline when possession is legal, removing another pathway to treatment.
Does this mean legalization is bad for teens?
The study does not make that claim. It identifies a specific mechanism: legalization changes how teens and society respond to cannabis use, potentially creating a gap between need for treatment and treatment-seeking. Proactive outreach could address this gap.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-05545APA
Mennis, Jeremy; Stahler, Gerald J; Coffman, Donna L. (2024). Why Are Adolescent Cannabis Use Disorder Treatment Admissions Declining in the US? The Mediated Pathway of State Treatment Admissions Rates before and after Recreational Cannabis Legalization.. Substance use & misuse, 59(6), 962-970. https://doi.org/10.1080/10826084.2024.2310500
MLA
Mennis, Jeremy, et al. "Why Are Adolescent Cannabis Use Disorder Treatment Admissions Declining in the US? The Mediated Pathway of State Treatment Admissions Rates before and after Recreational Cannabis Legalization.." Substance use & misuse, 2024. https://doi.org/10.1080/10826084.2024.2310500
RethinkTHC
RethinkTHC Research Database. "Why Are Adolescent Cannabis Use Disorder Treatment Admission..." RTHC-05545. Retrieved from https://rethinkthc.com/research/mennis-2024-why-are-adolescent-cannabis
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.