Association Between the Use of Cannabis and Physical Violence in Youths: A Meta-Analytical Investigation

Dellazizzo, Laura; Potvin, Stéphane; Dou, Bo Yi; Beaudoin, Mélissa; Luigi, Mimosa; Giguère, Charles–Édouard; Dumais, Alexandre

doi:10.1176/appi.ajp.2020.19101008

Cited by 36 publications

(25 citation statements)

References 79 publications

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“…This should be done on the basis of longitudinal studies (too scarce) and by monitoring the evolution of impulsivity and consumption (with repeated assessments). The interactions between these two dimensions and with VB should be assessed, as well as the directionality or bi-directionality of these associations [which remains debated in studies targeting young adults ( 54 )]. Longitudinal studies should take into account possible confounding or mediating factors (mentioned above in the sections on the links between VB and CU), on the one hand, and VB and impulsivity, on the other hand.…”

Section: Discussionmentioning

confidence: 99%

“…The results of two recent meta-analyses ( 38 , 54 ) on adolescents and young adults on the one hand, and people with severe mental illnesses on the other hand, have shown significant results regarding the link between CU and violence. Among young people ( 54 ), a moderate association was found between CU and VB with an Odd Ratio (OR) of 2.11 (including OR of 2.15 for cross sectional studies and 2.02 for longitudinal studies). The results remained significant after controlling for important confounding factors.…”

Section: Cannabis Use and Violent Behavior In The Early Phase Of Psyc...mentioning

confidence: 99%

“…A second hypothesis suggests that CU may predispose to VB ( 61 , 66 , 67 ) through the induction of depersonalization and feeling of persecution . A third hypothesis suggests that pre-existing adolescent conduct disorders ( 12 , 68 ) or predisposition for aggression ( 54 ) could also lead to early CU and VB. For example, Rioux et al ( 59 ) have shown that delinquency at age 12 and associations with deviant peers is associated to early onset of CU, which in turn predicts violence.…”

Section: Explanatory Hypotheses Of the Link Between Cannabis Use And ...mentioning

confidence: 99%

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The Link Between Cannabis Use and Violent Behavior in the Early Phase of Psychosis: The Potential Role of Impulsivity

et al. 2022

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IntroductionRecently, the literature has shown that Cannabis Use (CU) was a risk factor for Violent Behavior (VB) in patients with psychosis, and those in the early phase of psychosis (EPP). These findings are relevant because of the high prevalence of CU in this EPP, and the potential for prevention during this phase of illness. However, there is still a lack of clear explanations, supported by empirical evidence, about what underlies the link between CU and VB against other.MethodThis viewpoint reviews the scientific literature on the link between CU and VB, and the involvement of impulsivity in this relationship. This last point will be addressed at clinical and neurobiological levels.ResultsRecent studies confirmed that CU is particularly high in the EPP, and is a risk factor for VB in the EPP and schizophrenia. Studies have also shown that impulsivity is a risk factor for VB in psychosis, is associated with CU, and may mediate the link between CU and VB. Research suggests a neurobiological mechanism, as CU affects the structures and function of frontal areas, known to play a role in impulsive behavior.ConclusionScientific evidence support the hypothesis of an involvement of impulsivity as a variable that could mediate the link between CU and aggression, particularly, when CU has an early onset. However, this hypothesis should be confirmed with longitudinal studies and by taking into account confounding factors. The studies highlight the relevance of early prevention in the EPP, in addition to interventions focusing on psychotic disorders.

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Section: Discussionmentioning

confidence: 99%

Section: Cannabis Use and Violent Behavior In The Early Phase Of Psyc...mentioning

confidence: 99%

Section: Explanatory Hypotheses Of the Link Between Cannabis Use And ...mentioning

confidence: 99%

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The Link Between Cannabis Use and Violent Behavior in the Early Phase of Psychosis: The Potential Role of Impulsivity

et al. 2022

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“…Our team chose to conduct a meta-analysis to clarify the association between cannabis use and violence, more precisely, the perpetration of any type of physical violence by adolescents and young adults (23). Studies were included so long as the behaviors being reported comprised acts of physical violence (e.g.…”

Section: Youths and Emerging Adultsmentioning

confidence: 99%

Violence and Cannabis Use: A Focused Review of a Forgotten Aspect in the Era of Liberalizing Cannabis

et al. 2020

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There has been a shift surrounding societal and legal perspectives on cannabis reflecting changing public attitudes towards the perceived safety and social acceptability of cannabis use. With cannabis liberalization internationally, the focus of most cannabisrelated harms has been on effects with users themselves. Harm-to-others including injuries from violence have nevertheless been unfortunately largely overlooked. While studies remain heterogeneous, there is meta-analytical evidence pointing towards an association. The aims of this focused review are twofold: (I) review the evidence from meta-analyses on the association between cannabis and violence; and (II) provide an overview of possible mechanisms relating cannabis use to violence. First, evidence from meta-analytical studies in youths, intimate partners, and individuals with severe mental disorders have shown that there is a global moderate association between cannabis use and violence, which is stronger in the latter more at-risk population. Preliminary data has even highlighted a potential dose-response relationship with larger effects in more frequent users. Although of importance, this subject has remained essentially forgotten as a public health concern. While literature remains inconclusive, data has suggested potential increases in cannabis use following liberalization policies. This may increase violent outcomes if the effect is directly related to the use of cannabis by means of its psychophysiological modifications. However, for the moment, the mechanisms associating cannabis use and violence remain to be clearly resolved. Considering the recency of policy changes on cannabis, further methodologically sound research using longitudinal designs should examine the effects that cannabis use may have on different forms of violence and the trends that emerge, while evaluating the effects of possible confounding factors (e.g. other substance use). In addition, as evidence-based research from meta-analyses have shown that cannabis use is associated with violence, measures must be taken to mitigate the risks.

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“…Las consecuencias del consumo de sustancias a corto plazo incluyen intoxicaciones etílicas, sobredosis y mayor probabilidad de conductas de riesgo mientras están bajo los efectos de estas sustancias, lo que aumenta su participación en actos violentos y delictivos, intentos autolíticos, mayor riesgo de infecciones de transmisión sexual, accidentes de tráfico, embarazos no deseados, etc. A medio y largo plazo, sus consecuencias se extienden a la infección por VIH, endocarditis, embolia, enfermedades pulmonares, celulitis, hepatocarcinoma relacionado con hepatitis y cirrosis, sobredosis y muerte prematura, entre otros (227,228,233).…”

Section: I9 Consumo De Sustanciasunclassified

Factores asociados a la práctica de actividad física, alimentación y otros hábitos relacionados con la salud en adolescentes de la provincia de Valladolid

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Association Between the Use of Cannabis and Physical Violence in Youths: A Meta-Analytical Investigation

Cited by 36 publications

References 79 publications

The Link Between Cannabis Use and Violent Behavior in the Early Phase of Psychosis: The Potential Role of Impulsivity

The Link Between Cannabis Use and Violent Behavior in the Early Phase of Psychosis: The Potential Role of Impulsivity

Violence and Cannabis Use: A Focused Review of a Forgotten Aspect in the Era of Liberalizing Cannabis

Factores asociados a la práctica de actividad física, alimentación y otros hábitos relacionados con la salud en adolescentes de la provincia de Valladolid

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