Childhood Trauma Amplifies the Link Between Cannabis Use and Paranoid Thinking
A study of 412 young adults found childhood trauma moderated the cannabis-paranoia relationship: cannabis use was associated with paranoid thinking only in those with a history of childhood adversity.
Quick Facts
What This Study Found
Cannabis use alone was not significantly associated with paranoia (p=0.18). Childhood trauma alone was associated with paranoia (p<0.001). The interaction between cannabis use and childhood trauma was significant (p=0.003): cannabis use was associated with paranoid thinking only among those with moderate-to-high childhood adversity scores. The effect was strongest for emotional abuse and neglect.
Key Numbers
412 young adults; cannabis alone p=0.18 (not significant); trauma-cannabis interaction p=0.003; emotional abuse and neglect strongest moderators.
How They Did This
Cross-sectional study of 412 young adults aged 18-30. Cannabis use assessed via TLFB. Childhood trauma measured with CTQ. Paranoid ideation assessed with a validated paranoia scale. Moderation analysis with bootstrapping.
Why This Research Matters
Not everyone who uses cannabis becomes paranoid. This study identifies childhood trauma as a key vulnerability factor, suggesting that the cannabis-psychosis link may be conditional on prior adversity rather than universal.
The Bigger Picture
The cannabis-psychosis debate often treats all users as equally vulnerable. This study supports a diathesis-stress model where cannabis acts as a trigger primarily in individuals with pre-existing vulnerabilities from childhood adversity.
What This Study Doesn't Tell Us
Cross-sectional design. Self-reported trauma and cannabis use. Paranoia measured dimensionally, not as clinical psychosis. University sample may not represent general population. Cannot rule out reverse causation.
Questions This Raises
- ?Should trauma screening be part of cannabis risk counseling?
- ?Does the type of childhood trauma differentially affect cannabis-psychosis risk?
Trust & Context
- Key Stat:
- Evidence Grade:
- Well-powered moderation analysis with validated measures, but cross-sectional design limits causal inference.
- Study Age:
- 2025 study examining childhood trauma as a moderator of cannabis-paranoia associations.
- Original Title:
- The impact of childhood trauma and cannabis use on paranoia: a structural equation model approach.
- Published In:
- Psychological medicine, 55, e220 (2025)
- Authors:
- Trotta, Giulia(9), Spinazzola, Edoardo(11), Degen, Hannah(2), Li, Zhikun, Austin-Zimmerman, Isabelle, Leung, Bok Man, Lang, Yifei, Rodriguez, Victoria, Aas, Monica, Sideli, Lucia, Wolff, Kim, Freeman, Tom P, Murray, Robin M, Wong, Chloe C Y, Alameda, Luis, Di Forti, Marta
- Database ID:
- RTHC-07826
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
Does cannabis cause paranoia?
This study found cannabis use was associated with paranoia only in people with childhood trauma histories. Without trauma, cannabis use was not significantly linked to paranoid thinking.
Am I at risk for paranoia from cannabis?
People with histories of childhood emotional abuse or neglect may be more vulnerable. This study found childhood adversity was a key factor determining whether cannabis use was associated with paranoid thinking.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-07826APA
Trotta, Giulia; Spinazzola, Edoardo; Degen, Hannah; Li, Zhikun; Austin-Zimmerman, Isabelle; Leung, Bok Man; Lang, Yifei; Rodriguez, Victoria; Aas, Monica; Sideli, Lucia; Wolff, Kim; Freeman, Tom P; Murray, Robin M; Wong, Chloe C Y; Alameda, Luis; Di Forti, Marta. (2025). The impact of childhood trauma and cannabis use on paranoia: a structural equation model approach.. Psychological medicine, 55, e220. https://doi.org/10.1017/S0033291725101190
MLA
Trotta, Giulia, et al. "The impact of childhood trauma and cannabis use on paranoia: a structural equation model approach.." Psychological medicine, 2025. https://doi.org/10.1017/S0033291725101190
RethinkTHC
RethinkTHC Research Database. "The impact of childhood trauma and cannabis use on paranoia:..." RTHC-07826. Retrieved from https://rethinkthc.com/research/trotta-2025-the-impact-of-childhood
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.