Genome-wide association study of aggression and violence in schizophrenia

Female Homicide in Italy in 2021: Different Criminological and Psychopathological Perspectives on the Phenomenon

The intentional homicide of female victims, which is most commonly perpetrated by intimate partners or family members, has been recognized in recent years as a matter of grave public concern that needs to be addressed from the cultural and judicial perspectives. To allow an in-depth criminological and psychopathological evaluation of female homicide in Italy in 2021 to be conducted, the authors performed a newspaper report analysis of the phenomenon. All female homicides that occurred in Italy in 2021 (n = 119) were included in the study. The analysis confirmed the low rate of female homicides in Italy when compared with other countries and also showed the phenomenon to be more complex than usually described. The highest rate of homicides was observed in elderly females when compared with other age groups, implying different criminological considerations and suggesting that gender-based violence may only explain some of the identified cases. The high incidence of suicide or attempted suicide among offenders, together with the high incidence of reported mental disorders in that population, suggests that a psychopathological perspective on the phenomenon of female homicide could help with the development and implementation of preventive strategies that focus on managing mental health at a territorial level and intervening in difficult domestic situations.

The Neutrophil-Lymphocyte Ratio Is Positively Correlated with Aggression in Schizophrenia

To find biomarkers to assess the risk of aggression, we looked at the association between aggression and levels of body inflammation in patients with schizophrenia. The Modified Overt Aggression Scale (MOAS) score was used to divide the aggressive (n = 72) and nonaggressive (n = 141) groups. The Brief Psychiatric Rating Scale (BPRS) is a tool for determining the severity of a patient's condition. After measuring the number of inflammatory cells in the peripheral blood, the platelet-lymphocyte ratio (PLR), neutrophil-lymphocyte ratio (NLR), and monocyte-lymphocyte ratio (MLR) were estimated. We investigated the relationship between aggressive behavior, bodily inflammation, and BPRS. Before therapy, the aggressive group's BPRS score, white blood cell (WBC) count, neutrophil count, monocyte count, NLR, and MLR were considerably more significant than the nonaggressive group's. After therapy, statistically significant variations in total BPRS score and neutrophil count between the two groups. According to correlation analysis before and after treatment, aggressive behavior was positively connected with neutrophil count, NLR, and BPRS score. The presence of aggressive behavior in schizophrenic patients indicates the severity of the disorder to some degree. NLR can be used as an objective biomarker to quickly assess the risk of aggression in schizophrenic patients.

Candidate symptomatic markers for predicting violence in schizophrenia: A cross-sectional study of 7711 patients in a Chinese population

OBJECTIVE

Violent behaviour is an alarming problem among schizophrenia patients. The effects of historical, clinical, and pathological risk factors for violence have been investigated by multiple studies, but consensus has not been achieved. As psychotic symptoms are more direct and intuitive indicators for violence, identifying robustly associated symptoms is a crucial part of the future prediction and precise management of violent patients in clinics. This study aims to identify the psychotic symptoms correlated with violence among schizophrenia patients in a Chinese population.

METHODS

In this cross-sectional study, the medical records of 7711 schizophrenia patients (4711 in the discovery set and 3000 in the validation set) were collected from 1998 to 2010. Their psychotic symptoms were extracted, and the patients were divided into violent and non-violent groups. Multivariate logistic analysis was applied to identify symptoms associated with violence in the discovery set.

RESULTS

Eight psychotic symptoms were found to be significantly correlated with violence in schizophrenia. "Destruction of property", "verbal aggression" and "insomnia" increased the risk of violence, while "flat affect", "delusion of persecution", "auditory hallucination", "vagueness of thought" and "poverty of thought" decreased the risk of violence. The regression model was evaluated by receiver operating characteristic (ROC) analysis for its discriminatory performance, achieving area under curve (AUC) values of 0.887 in the discovery sample set and 0.824 in the validation sample set.

CONCLUSIONS

The correlated symptoms identified by this study can serve as future candidate predictors for violence in schizophrenia, paving the way for precise management of schizophrenia patients in clinics.