Prevalence and phenomenology of violent ideation and behavior among 200 young people at clinical high-risk for psychosis: an emerging model of violence and psychotic illness

Eating disorders and disordered eating symptoms in individuals at clinical high risk for psychosis: a systematic review and meta-analysis

BACKGROUND

Eating disorders (EDs) are among the least studied mental disorders in individuals at clinical high risk for psychosis (CHR-P). The primary aim (a) of this systematic review and meta-analysis was to identify factors predicting ED diagnoses in CHR-P individuals. The secondary aim (b) was providing a comprehensive clinical description of individuals with both CHR-P and EDs/ED-related symptoms.

METHODS

Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) 2020-compliant systematic review and meta-analysis, searching PubMed/(EBSCO)PsycINFO/Web of Science for studies published between 01/01/2018 and 30/05/2023, including individuals with CHR-P and EDs/ED symptoms (PROSPERO CRD42023488792). Quality assessment was performed using the Newcastle-Ottawa Scale (NOS). We performed a meta-regression model on the proportion of EDs in CHR-P individuals (primary aim) and conducted a narrative synthesis (secondary aim).

RESULTS

We included 26 articles, reporting on 2,060 and 589 subjects for study aim (a) and (b), respectively (mean NOS score = 6.38). The prevalence of EDs in CHR-P individuals was 0.05 (95% CI 0.3-0.8). No factor had a significant effect on the proportion of EDs in CHR-P individuals. This result is limited by the inability to include ED-related symptoms and antipsychotic prescriptions in the meta-regression model, due to an insufficient number of studies reporting on these variables. The narrative synthesis offers a characterization of individuals with both CHR-P and ED/ED-related symptoms; however, the limited number of included studies is insufficient to support definitive conclusions.

CONCLUSIONS

No significant predictor of EDs was found in CHR-P individuals. Transdiagnostic, prospective cohort studies are warranted to examine long-term outcomes in individuals with both CHR-P and EDs, beyond diagnostic silos.

LEVEL OF EVIDENCE

I. Systematic review and meta-analysis.

Distinct trajectories of psychotic-like experiences and their associations with violent behavior among 3539 young adults: A 3-year prospective cohort study

BACKGROUND

Violence perpetration may be linked to psychotic-like experiences (PLEs), but relevant research is limited, especially in general population. Therefore, we aimed to identify trajectories of PLEs and examine whether specific trajectories were related to violent behavior in a 3-year cohort study.

METHODS

We developed a prospective cohort study and collected data in 2020 (T0), 2021 (T1), and 2022 (T2) in Guangzhou, China. A total of 3539 university students from two universities were included and completed self-report questionnaires to assess PLEs, violent ideation, violent threats, and violent acts. Socio-demographic and clinical factors were assessed and considered as confounding factors. We used growth mixture modeling to identify trajectories of PLEs. Associations between PLEs trajectories and violent behavior were examined using binary logistic regression.

RESULTS

At T2, 162 (5.3 %) participants had violent behavior. We identified three distinct trajectories: low stable trajectory, low increasing trajectory, and high decreasing trajectory. The binary logistic regression models revealed that the high decreasing (OR: 2.46, 95%CI:1.60-3.72) group and the low increasing (OR: 11.7, 95%CI: 7.62-17.9) were associated with higher violent risk compared to the low stable group after controlling for baseline socio-demographic and clinical factors.

CONCLUSION

Our study delineated three distinct trajectories and indicated that PLEs trajectories are related to subsequent violent ideation and violent acts. The results provide crucial clarifications regarding the nature of the associations between PLEs trajectories and violence over time.

Delusions and Delinquencies: A Comparison of Violent and Non-Violent Offenders With Schizophrenia Spectrum Disorders

The relationship between schizophrenia spectrum disorders (SSD) and violent offending has long been the subject of research. The present study attempts to identify the content of delusions, an understudied factor in this regard, that differentiates between violent and non-violent offenses. Limitations, clinical relevance, and future directions are discussed. Employing a retrospective study design, machine learning algorithms and a comprehensive set of variables were applied to a sample of 366 offenders with a schizophrenia spectrum disorder in a Swiss forensic psychiatry department. Taking into account the different contents and affects associated with delusions, eight variables were identified as having an impact on discriminating between violent and non-violent offenses with an AUC of 0.68, a sensitivity of 30.8%, and a specificity of 91.9%, suggesting that the variables found are useful for discriminating between violent and non-violent offenses. Delusions of grandiosity, delusional police and/or army pursuit, delusional perceived physical and/or mental injury, and delusions of control or passivity were more predictive of non-violent offenses, while delusions with aggressive content or delusions associated with the emotions of anger, distress, or agitation were more frequently associated with violent offenses. Our findings extend and confirm current research on the content of delusions in patients with SSD. In particular, we found that the symptoms of threat/control override (TCO) do not directly lead to violent behavior but are mediated by other variables such as anger. Notably, delusions traditionally seen as symptoms of TCO, appear to have a protective value against violent behavior. These findings will hopefully help to reduce the stigma commonly and erroneously associated with mental illness, while supporting the development of effective therapeutic approaches.

Psychometric properties of an Arabic translation of the long (12 items) and short (7 items) forms of the Violent Ideations Scale (VIS) in a non-clinical sample of adolescents

BACKGROUND

Accurately measuring violent ideations would be of particular high relevance in Arab countries, which are witnessing an unprecedented increase in violence rates among adolescents because of the widespread social, economic and political unrest in the region. Therefore, the present study aimed to test the psychometric properties of an Arabic translation of the 12-item and the 7-item forms of the Violent Ideations Scale (VIS and VIS-SF) in a sample on non-clinical Arabic-speaking adolescents.

METHODS

Five hundred seventy-seven community adolescents (mean age of 15.90 ± 1.73 years, 56.5% females) answered an anonymous online survey comprising an Arabic translation of the Violent Ideations Scale (VIS) and a measure of physical aggression.

RESULTS

Confirmatory factor analyses (CFA) offered support for the single-factor structure of the Arabic VIS and the VIS-SF. Both the long and short forms of the scale yielded excellent internal consistency, with McDonald's ω coefficients of 0.96 and 0.94 and Cronbach's α coefficients of 0.96 and 0.94, respectively. Multi-group CFA established measurement invariance across gender groups. Finally, results revealed significant and positive correlations between the two forms of the VIS and physical aggression scores, thus supporting concurrent validity.

CONCLUSION

Both the VIS and VIS-SF have demonstrated good psychometric properties in their Arabic versions, and suitability for sound assessment of violent ideations. We therefore expect that these measures assist clinicians in risk assessment and management of violence, and help foster research in this area in Arab countries.

Validation of the Violent Ideations Scale (VIS) in Spain

Research has shown that violent ideations (VIs) may play a key role in aggression and violence. However, there is no tool to measure this construct adapted to the Spanish language so far. The current study aims to translate and evaluate the psychometric properties of the Violent Ideations Scale (VIS) in European Spanish. This study counts with a convenience sample of 752 native Spaniards or Spanish speakers residing in Spain, between 18- and 75-years old, 53% identified as female and 47% identified as male. The dimensionality, gender measurement invariance, concurrent validity and reliability of scores were assessed. Initial evidence of external validity was collected. Results confirmed the unidimensionality of the instrument. Measurement invariance held across females and males and reliabilities were high. VIS-ES scores correlated with aggressive behavior during the previous month. The VIS-ES seems suitable for use in non-clinical Spanish speaking samples.

MMPI-2-RF Differences Between Violent Offending and Institutional Violence Among Incarcerated Women

The examination of violence perpetrated by female offenders remains an understudied topic, as research typically focuses on male offender samples. As such, it remains unclear what personality characteristics may be associated with the perpetration of violence among female offenders. This study sought to examine the relationship between personality characteristics, as assessed by the MMPI-2-RF, and engagement in violence, within a sample of 228 incarcerated women. Results indicated that women serving time for a violent offense obtained higher mean scores on MMPI-2-RF scales related to underreporting, atypical thoughts/experiences, and paranoia. Women who obtained disciplinary reports for violence within the institution obtained higher mean scores on MMPI-2-RF scales related to behavior/externalizing dysfunction, overactivation, and aggression. Taken together, violence was most strongly associated with the MMPI-2-RF scales related to paranoia and atypical thoughts/experiences (e.g., THD, PSYC-r). This study provides new data on the viability of the MMPI-2-RF to provide critical insights into violent and aggression behavior in female inmates, an understudied population and demonstrate the instrument's efficacy in assessing characteristics associated with violent behavior.

The Impact of Increasing Community-Directed State Mental Health Agency Expenditures on Violent Crime

Violent crime remains a prevalent threat to population health within the United States. States offer varying policy approaches to prevent violent crime and support behavioral health, such as community-based programs that include substance use disorder prevention and treatment. Using state mental health agency data, we construct a panel of U.S. states over nine years and apply an instrumental variables empirical model with state and time fixed effects to adjust for policy endogeneity, omitted variable bias, and time trends. We find that a 10% increase in community-directed state mental health agency expenditures yielded nearly a 4% reduction in violent crime rates. Larger magnitude reductions in violent crime rates were associated with the presence of gun control regulations and increases in the proportion of the population completing secondary education. Policymakers should consider the added benefit of violent crime reduction when considering budgetary allocations of community-directed state mental health agency expenditures.

Feasibility and Utility of Different Approaches to Violence Risk Assessment for Young Adults Receiving Treatment for Early Psychosis

This pilot study examined violence risk assessment among a sample of young adults receiving treatment for early psychosis. In this study, thirty participants were assessed for violence risk at baseline. Participants completed follow-up assessments at 3, 6, 9 and 12 months to ascertain prevalence of violent behavior. Individuals were on average 24.1 years old (SD = 3.3 years) and predominantly male (n = 24, 80%). In this sample, six people (20%) reported engaging in violence during the study period. Individuals who engaged in violence had higher levels of negative urgency (t(28) = 2.21, p = 0.035) This study sought to establish the feasibility, acceptability, and clinical utility of violence risk assessment for clients in treatment for early psychosis. Overall, this study found that most individuals with early psychosis in this study (who are in treatment) were not at risk of violence. Findings suggest that violent behavior among young adults with early psychosis is associated with increased negative urgency.

Bullying in clinical high risk for psychosis participants from the NAPLS-3 cohort

PURPOSE

Bullying is associated with a heightened risk for poor outcomes, including psychosis. This study aimed to replicate previous findings on bullying prevalence in clinical high-risk (CHR) individuals, to assess the longitudinal course of clinical and functional variables between bullied and non-bullied CHR and the association of bullying with premorbid functioning, clinical outcome, transition to psychosis and risk of violence.

METHODS

The sample consisted of 691 CHR participants and 96 healthy controls. Participants reported whether they had experienced bullying and how long it had lasted. Assessments included DSM-5 diagnoses, attenuated psychotic symptoms, negative symptoms, social and role functioning, depression, stress, premorbid functioning, and risk of violence. The bullied and non-bullied CHR groups were compared at baseline and further longitudinally on clinical and functioning variables and transition to psychosis.

RESULTS

Bullying was more prevalent among CHR individuals than healthy controls. Bullied CHR had a higher prevalence of PTSD and more severe depression and stress at baseline than non-bullied CHR. There was no impact of bullying on clinical and functional variables over time. Bullying was not related to final clinical status or transition to psychosis. However, bullied participants had poorer premorbid functioning and a greater risk of violence.

CONCLUSION

While bullying may not impact the likelihood of CHR individuals to transition to psychosis, it may be a risk factor for development of the at-risk state and may be related to a greater risk of violence. Future studies should consider bullying perpetration among CHR individuals.

Validation of an Extended Violent Ideations Scale to Measure Both Non-Sexual and Sexual Violent Ideations (The VIS-X)

Abstract. A previous study developed and validated a multi-item instrument for the assessment of violent ideations, the “Violent Ideations Scale” (VIS). However, the final 12-item scale contained no items relating to sexual violence and was thus lacking an important dimension of violence. The current study explores an expansion of the original VIS to include ideations of sexual violence and investigates the psychometric properties of this new version: The Violent Ideations Scale-Extended (VIS-X). The VIS-X was completed by participants in the latest wave of the z-proso study ( N = 1,177; 595 females, 580 males aged 19–22 years). Exploratory factor analysis was conducted in a calibration sample and confirmatory factor analysis in a validation sample to establish a two subscale structure as optimal. Cronbach’s α and Composite Reliability suggested good internal consistency. Nomological analysis supported the convergent validity of the scores.

Thematic content of obsessive and compulsive symptoms and conversion to psychosis in a clinical high-risk cohort

AIM

We sought to explore the complex phenomenological overlap between obsessive and compulsive symptoms (OCS), and attenuated positive symptoms among 156 young people at clinical high-risk (CHR) for psychosis.

METHODS

In order to explore the hypothesis that OCS of an implausible nature might optimally predict future transition to syndromal psychosis, ideas associated with obsessive and compulsive experiences elicited by clinical measures were thematically categorized as "plausible" or "implausible."

RESULTS

While OCS were found to be common in our CHR sample, we did not find that implausible OCS themes were predictive of conversion.

CONCLUSION

Given the absence of qualitative differences between OCS and early psychotic symptoms, we propose that clinicians encountering adolescent or young adult patients with new-onset OCD or OCS in the past year should monitor such symptoms for a minimum of 2 years to assess for the possible emergence of psychosis.

Violence risk assessment for young adults receiving treatment for early psychosis

AIM

Although the absolute risk of violence is small for individuals with mental illnesses, a specific subgroup of individuals who appear to be at increased risk for violence includes young people experiencing emerging or early psychosis. Prior research has identified risk factors for violence in this population, though no prior studies using a formal risk assessment tool have been identified. This study used the Historical Clinical Risk Management-20, version 3 (HCR-20) to identify risk of future violence among a sample of young adults with early psychosis and relevant predictors of risk unique to this population.

METHODS

The HCR-20 was administered to a sample of young adults with early psychosis (N = 53) enrolled at one OnTrackNY site, part of a statewide program providing early intervention services to young adults presenting with a first episode of non-affective psychosis. A Confirmatory Factor Analysis (CFA) was conducted to explore the relative importance of the HCR-20 items for this population.

RESULTS

The average age of participants was 21.9 years (SD 3.6 years) and most were male (69.8%, n = 37). Most patients were assessed to be at low risk for future violence based on the Case Prioritization summary risk rating (67.9%, n = 36). The CFA identified 4 items that were not of relative predictive value in identifying the risk of violence in this sample: history of substance use (item H5), history of major mental disorder (item H6), living situation (item R2), and personal support (item R3).

CONCLUSION

This study presents a formal approach to assessing violence risk in a population at elevated risk of violence, demonstrates the feasibility of using a standardized risk assessment tool in early intervention services, and identifies factors of particular importance associated with predicting violence in this population. Future research should implement violence risk assessment with a structured tool such as the HCR-20 and assess its accuracy in predicting future violent behavior in this setting.

White Matter Correlates of Hostility and Aggression in the Visuospatial Function Network in Patients With Schizophrenia

Background: Violent acts in patients with schizophrenia are often associated with their hostility and aggression levels. Poor visuospatial processing has been suggested as a possible risk factor of violence in schizophrenia. However, studies investigating the relationship between hostility, aggression, and the visuospatial function have been lacking. Here, we aimed to investigate brain dysconnectivity associated with hostility and aggression in schizophrenia, particularly focusing on the visuospatial function network. Methods: Eighty-eight participants with schizophrenia and 42 healthy controls were enrolled. The visuospatial function network regions of interest were analyzed using Tract-Based Spatial Statistics. The hostility item from the Positive and Negative Syndrome Scale (PANSS), aggressive, and agitated behavior item from the Scale for the Assessment of Positive Symptoms (SAPS), and the Rey Complex Figure Test (R-CFT) were measured. Results: Among the participants with schizophrenia, the SAPS aggressive and agitated behavior scores were significantly correlated with fractional anisotropies (FAs) of the white matter regions in the splenium of the corpus callosum (CC), left posterior thalamic radiations (PTR), and left posterior corona radiata (PCR). Exploratory correlational analysis revealed significant negative correlations between FAs of the splenium of the CC and R-CFT copy and immediate recall scores. In addition, three regions including CC, PTR, and PCR that significantly correlated with the aggression scores showed significant correlations with the total PANSS scores. Conclusion: Our main finding suggests that aggression of patients with schizophrenia may be associated with poor visuospatial ability and underlying white matter dysconnectivity. These may help enhance understanding aggression in patients with schizophrenia.

An imaging-based risk calculator for prediction of conversion to psychosis in clinical high-risk individuals using glutamate 1H MRS

Risk calculators for prediction of conversion of Clinical High-Risk (CHR) individuals to syndromal psychosis have recently been developed and have generated considerable clinical use and research interest. Predictor variables in these calculators have been clinical rather than biological, and our goal was to incorporate a neurochemical imaging measure into this framework and assess its impact on prediction. We combined striatal glutamate ¹H MRS data with the SIPS symptoms identified by the Columbia Risk Calculator as having the greatest predictive value in order to develop an imaging-based risk calculator for conversion to psychosis. We evaluated the calculator in 19 CHR individuals, 7 (36.84%) of whom converted to syndromal psychosis during the 2-year follow up. The receiver operating characteristic (ROC) curve for the logistic model including only striatal glutamate and visual perceptual abnormalities showed an AUC = 0.869 (95% CI = [0.667, 1.000]) and AUC_oa = 0.823, with sensitivity of 0.714, specificity of 0.917, positive predictive value of 0.833, and negative predictive value of 0.846. These results represent modest improvements over each of the individual ROC curves based on either striatal glutamate or visual perceptual abnormalities alone. The preliminary model building and evaluation presented here in a small CHR sample suggests that the approach of incorporating predictive imaging measures into risk classification is not only feasible but offers the potential of enhancing risk assessment.

Hostility and aggressive behaviour in first episode psychosis: Results from the OPTiMiSE trial

AIM

The aim of this paper is to determine clinical factors related to hostility and disturbing and aggressive behaviour and to examine the effect of medication on these behaviours in FEP.

METHODS

Data from phase I and II of the OPTiMiSE trial are used. Outcome measures are the hostility item of the Positive and Negative Syndrome Scale (PANSS P7) and the disturbing and aggressive behaviour domain of the Personal and Social Performance scale (PSP-D).

RESULTS

Moderate, severe or extreme hostility (PANSS P7 > 3) was present in 42 patients (9.4%). The PANSS P7 and PSP-D were low to moderate but significantly associated with the selected PANSS items: delusions, hallucinatory behaviour, excitement, tension, uncooperativeness, unusual thought content, impulsivity, and lack of judgement and insight. In a subsample of 185 patients (41.5%) with baseline PANSS P7 > 1, the PANSS P7 and PSP-D scores improved in the first 4 weeks of amisulpride treatment. This effect remained significant after controlling for baseline positive symptoms (PANSS P1-P6). No significant differences were found between olanzapine and amisulpride in the second phase of the trial.

CONCLUSION

Clinical risk factors such as poor impulse control, uncooperativeness and excitement could help clinicians in detecting and treating hostile and aggressive behaviour in FEP. Amisulpride could be an effective antipsychotic choice in the treatment of FEP patients who express hostile or aggressive behaviour. Future research is needed to compare the effects of amisulpride and olanzapine on hostility in FEP during the first weeks of treatment.

Amygdalar volume and violent ideation in a sample at clinical high-risk for psychosis

We previously demonstrated that violent ideation predicts both violent acts and eventual progression to syndromal psychosis in individuals at clinical high-risk for psychosis (CHR). We performed amygdalar surface morphometry analysis on MRI scans from 70 CHR individuals, 21 of whom had violent ideation, 49 of whom did not. CHR individuals with violent ideation have abnormal and asymmetric amygdalar volumes. These data suggest some commonalities in the genesis of violence and aggression among clinical populations, as well as that there may be specific neurobiological links between violence and psychosis.