ArticleEuropean psychiatry : the journal of the Association of European Psychiatrists2020
Early onset of cannabis use and violent behavior in psychosis.
Article in European psychiatry : the journal of the Association of European Psychiatrists, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.
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Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Systematic review of risk factors for violence in psychosis: 10-year update.The British journal of psychiatry : the journal of mental science · 2025Pooled it
- "I don't belong here": experiences of substance use and treatment compliance among young adults in Lango, Uganda.Frontiers in public health · 2025Article
- Cannabis in Adolescence: Lasting Cognitive Alterations and Underlying Mechanisms.Cannabis and cannabinoid research · 2023Review
- Tell me who your friends are?! The mediating role of friends' use in cannabis abuse.Trends in psychiatry and psychotherapy · 2022Article
- The Link Between Cannabis Use and Violent Behavior in the Early Phase of Psychosis: The Potential Role of Impulsivity.Frontiers in psychiatry · 2022Article
- Aggressive Behavior and Psychiatric Inpatients: a Narrative Review of the Literature with a Focus on the European Experience.Current psychiatry reports · 2021Review
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Authors and funding
8 authors.
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Abstract
backgroundAlthough evidence from psychosis patients demonstrates the adverse effects of cannabis use (CU) at a young age and that the rate of CU is high in subgroups of young violent patients with psychotic disorders, little is known about the possible effect of the age of onset of CU on later violent behaviors (VB). So, we aimed to explore the impact of age at onset of CU on the risk of displaying VB in a cohort of early psychosis patients.
methodData were collected prospectively over a 36-month period in the context of an early psychosis cohort study. A total of 265 patients, aged 18-35 years, were included in the study. Logistic regression was performed to assess the link between age of onset of substance use and VB.
resultsAmong the 265 patients, 72 had displayed VB and 193 had not. While violent patients began using cannabis on average at age 15.29 (0.45), nonviolent patients had started on average at age 16.97 (0.35) (p = 0.004). Early-onset CU (up to age 15) was a risk factor for VB (odds ratio = 4.47, confidence interval [CI]: 1.13-20.06) when the model was adjusted for age group, other types of substance use, being a user or a nonuser and various violence risk factors and covariates. History of violence and early CU (until 15) were the two main risk factors for VB.
conclusionsOur results suggest that early-onset CU may play a role in the emergence of VB in early psychosis.
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