Evolution of impulsivity levels in relation to early cannabis use in violent patients in the early phase of psychosis

Systematic Review and Meta-Analysis: Risk Factors of Violence During First-Episode Psychosis

Most people with a psychotic illness will never be violent; however, it is widely known that violence is more prevalent in this group compared to the general community, particularly during first-episode psychosis (FEP). Despite this, there is limited research into what contributes to this increased risk during FEP. The present systematic review aimed to identify whether certain risk factors are differentially associated with severity and timing of violence perpetration during FEP. The following databases were used to identify studies, up to March 8, 2024: MEDLINE, Embase, PsycINFO, CINAHL, and ProQuest. A total of 15 studies were included. Male gender, non-white ethnicity, history of violence, higher general psychopathology, and recent substance use were significantly associated with any violence, regardless of the time at which violence was committed. Serious violence was not associated with any risk factors. Higher general psychopathology was associated with any violence committed before presentation to services, while male gender was associated with violence perpetrated at service entry. Only male gender and unemployment were associated with violence committed after treatment. Based on our results, risk factors appear to vary according to the severity and timing of violence. These risk factors also overlap with those found associated with violence risk in the general community, and those correlated with the risk of psychosis. Past studies are limited in the range of risk factors studied and further work is needed to understand correlates of violence in people who have experienced FEP to inform treatment options.

Work engagement, impulsivity and, self-efficacy among Polish workers. Moderating role of impulsivity

The study proposes adding a new component to the Job Demands-Resources Theory, termed 'personal demands'. Impulsivity serves as an illustrative example of personal demands. A cross-sectional questionnaire was conducted and a total of 394 (Female = 59.6%) workers were surveyed. Standardized survey questionnaires were used in the study, i.e. The Utrecht Work Engagement Scale (UWES-9), Life Roles Self-Efficacy Scale (LRSES) and UPPS-P Impulsive Behaviour Scale. The obtained results indicate that Work Engagement correlates negatively with Impulsivity scales (lack of premeditation (r = -.22; p < .001), lack of persistence (r = -.27; p < .001), positive urgency (r = -.12; p, < .01) and negative urgency (r = -.12; p < .01)). In addition, Positive Urgency, moderates the relation between Self-efficacy and Work Engagement, in line with the theory (B = .133; SE = .067; t = 1.98; p < .05; LLCI = .0007; ULCI = 0.2643). This confirmed the fact, that impulsivity should be included in the JDR theory as a 'personal demand'.

Impulsivity as a predictor of clinical and psychological outcomes in a naturalistic prospective cohort of subjects at ultra-high risk (UHR) for psychosis from Tunisia

BACKGROUND

Impulsivity is associated with serious detrimental consequences on physical, mental, behavioral and social aspects of health among patients with psychosis. The present prospective 12-month follow-up study aimed to determine the prevalence of highly impulsive individuals among Ultra High Risk (UHR) patients, how impulsivity evolves over the follow-up period, and whether impulsivity impacts clinical, psychological and functional outcomes in this population.

METHOD

UHR patients were invited to complete a battery of measurements at three-time points: at baseline, and at 6 and 12 months of follow-up. Impulsivity was assessed using both behavioral (the Wisconsin Card Sorting Test, WCST) and self-report (the Barratt Impulsiveness Scale, BIS-11) measures.

RESULTS

Findings showed that at 6 months of follow-up, higher 6-month BIS-11 attentional and motor impulsivity were significantly associated with lower quality of life and greater general psychological distress. In addition, higher baseline BIS-11 motor impulsivity significantly predicted more severe positive psychotic symptoms at 12 months of follow-up. However, WCST scores did not show any significant associations with study variables at the different times of follow-up.

CONCLUSION

Interventions targeting impulsivity in UHR individuals could help decrease psychological distress and positive psychotic symptoms' severity, as well as improve quality of life in UHR individuals.

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

INTRODUCTION

Recently, 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.

METHOD

This 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.

RESULTS

Recent 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.

CONCLUSION

Scientific 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.