Violence and homicidal behaviors in psychiatric disorders

An exploratory study on the 10-year dynamic changes of mental health policy development and media stigma reporting in China (2011-2020)

BACKGROUND

China has introduced a large number of national mental health policies over the past decade. However, few studies have touched on what changes the policies brought to the media.

AIMS

This study aimed to investigate the relationship between stigma reports, classifications of mental disorders (SMI: severe mental illness vs. CMD: common mental disorders) and sources of information (mental health professionals vs. non-mental health professionals) from 2011 to 2020 in China Daily, an established official media of China.

METHOD

This study consists of policy review and media review. The policy review reviewed the media management content in Chinese national plans, policies, and laws on mental health from 2011 to 2020. China Daily news articles reporting mental illness-related topics were included in this study as the media material. After a two-step review, the eligible news articles were coded with a structured codebook. The proportion and frequency of stigma depiction of mental disorders, classifications of mental disorders and source of information were counted by year. Chi-test was undertaken to determine the relationship between stigma reports and different classifications of mental disorders and sources of information. An exploratory analysis was conducted to explore the changes in depiction around time points of policy publications.

RESULTS

The number of anti-stigmatizing articles increased significantly from 2011 to 2020. There is a statistical difference in the proportion of stigmatizing codes between articles featuring SMI and CMD (χ2 = 44.56, p < .001) and different sources of information (χ2 = 78.49, p < .001). And the statistical difference remained over the decade.

CONCLUSION

The results of the research indicate that the media may have alleviated the problem of stigma. But the subtle stigmatization still exists, which needs joint efforts of the government and media.

Schizophrenia-Like Psychosis Presented in a Patient With a Temporal Lobe Tumor: A Case Report

Psychiatric symptoms caused by brain lesions are not uncommon nowadays, caused by several different pathologies such as Alzheimer's, dementia, vascular and oncological diseases, etc. and they are known as neuropsychiatric or neurobehavioral symptoms, overlapping as mental health disorders. The most common primary brain tumors are gliomas, and the most common neuropsychiatric symptoms caused by them are depression, anxiety disorder, schizophrenia-like psychosis, anorexia nervosa, or cognitive dysfunction. We present a case of a 46-year-old male with no psychiatric familial history who started with a schizophrenia-like psychosis with hallucinations and, in consequence, killed his mother, symptoms which, after almost eight years, were known to be caused by a brain tumor.

The presence of alcohol consumption prior to homicide in Singapore

OBJECTIVE

To determine the prevalence of alcohol use disorders in people charged with homicide in Singapore. We also sought to determine which historical risk factors were associated with the use of alcohol 24 h prior to the homicide and with the presence of a severe mental illness at the material time of the offence.

METHODS

We extracted data from administrative records of all people charged with homicide in Singapore between 2007 and 2014. We used regression models to adjust for known confounding variables and explore the relationship between alcohol use and homicide.

RESULTS

Of 253 homicide offenders, 141 individuals (56%) meeting criteria for alcohol use disorders at the time of the offence. 121 offenders (48%) consumed alcohol within the 24 h preceding the homicide. Of the 149 that met criteria for a psychiatric diagnosis, 35 had a severe mental illness.

CONCLUSION

Alcohol use disorders are by far the most common disorder diagnosed in people charged with homicide in Singapore. Alcohol use is less common in homicide offenders with SMI.

Posttraumatic Stress Disorder Symptoms and Criminal Behavior in U.S. Army Populations: The Mediating Role of Psychopathy and Suicidal Ideation

Whereas past research has demonstrated the relationship between posttraumatic stress disorder (PTSD) and criminal behavior, the present study examines the underlying mechanisms driving this association. The primary objective was to determine the role of psychopathy and suicidal ideation as mediating factors in the relationship between military PTSD symptoms and criminal behavior (defined as incarceration status). A correlational study using archival data from the U.S. Disciplinary Barracks (USDB) and a control population of U.S. Army soldiers was conducted. The USDB provided data from 310 incarcerated male U.S. Army soldiers. Data were also collected from 310 nonincarcerated, male U.S. Army soldiers in the greater Fort Rucker, Alabama area. Data validity checks eliminated some cases, thus yielding a final dataset of 246 USDB and 252 control participants. The results suggested partial mediation, in that PTSD symptoms had a direct effect on incarceration status, and significant indirect effects through suicidal ideation and psychopathy while controlling for intelligence and warmth. In furnishing evidence of how psychopathy and suicidal ideation mediate the relationship between PTSD and incarceration status in military personnel, this research highlights specific internalization and externalization mechanisms that may increase the tendencies of people with greater PTSD symptoms to engage in criminal behaviors. By adding to the small amount of prior research on why PTSD sometimes leads people to engage in criminal behaviors, our research provides specific, observable symptoms that clinicians may use to identify, treat, and possibly ameliorate facets of PTSD that can lead affected people to engage in criminal behaviors.

Antisocial Personality Traits as a Risk Factor of Violence between Individuals with Mental Disorders

BACKGROUND

Mental disorder can increase the likelihood of taking violent acts of some individuals, but only a small percentage of violence in societies could be attributed to patients with mental health problems. For the past several years numerous studies related to forensic psychiatry has confirmed a close causal relationship between violent offenders and psychiatric comorbidity. Several studies have provided strong evidence that antisocial personality disorders (APD) represent a significant clinical risk for violence.

AIM

This study aims to show the relationship between antisocial personality disorder and antisocial personality traits with the other mental disorders and the manifestation of violence between the forensic populations of patients.

METHODS

The survey was conducted at the Psychiatric Hospitals and the Mental Health Centre. The research was carried out between two groups: one group of perpetrators of violence (PV) and a control group divided into two subgroups, a control group without violence (CG WV) and a group of respondents forcibly hospitalised CG FH. After obtaining consent for participation in the study, patients were interviewed, and questionnaires were applied. The research methodology included using measuring instrument-Psychopathy Checklist-revised (Hare's PCL-R).

RESULTS

The results show that in the group PV antisocial personality disorder is present in 45 patients, or 50% of the total sample. According to statistical research in between groups PV, CG WV and CG WV, there were determent significant differences in specifically listed items from Hare's PCL-R.

CONCLUSIONS

Psychopathological traits of mental disorders which are pathognomonic of committing violence are paranoid schizophrenia, as the most present and antisocial personality disorder in comorbidity, as the highest risk factor among the population with mental disorders that manifest violence.

[Homicide-suicide: Clinical review and psychological assumptions]

OBJECTIVES

Suicide-homicide could be defined as a "suicidal" behaviour, which also includes the death of at least one other individual and sometimes up to hundreds. This literature review intends to highlight some characteristic features that might be found amongst the various types of suicide-homicide. It is a complex phenomenon which can occur in different situations, from a familial and somehow intimate setting (filicide, uxoricide, marital homicide…) to a public one (workplace shooting, school shooting), including a wide range of victims, from a single victim in marital cases of suicide-homicide to hundreds of victims in certain types, such as suicide by aircraft or warrior-like multi-homicids in terrorist acts. This literature review offers a combination of data emanating from scientific publications and case studies from our practices in an attempt to insulate some common factors. A thorough examination of the offenses unravels complex processes, ideations, M.O and peculiar cognitive impairments in which the familial suicide-homicide could be rooted. Mass murders might be caused also by a psychopathological alloy, made of Grandiose Self and sub-depressive and even paranoid ideations. Concerning the terrorism and multi-homicide-suicide, this is far more complex phenomenon and is defined by a group-process enrolment and ideological conviction. Beyond epidemiological studies, both descriptive and statistical, this paper's objective is to isolate a hypothesis about a psychopathological ground from which a criminological mechanism could emerge. Despite the lack of blatant psychosis, some traits might be identified in suicide-homicide cases - such as paranoid, psychopathic, narcissistic, melancholic - which can intertwine, potentiate one with another forming a distorted view of the world. The offense dynamic is possibly composed of preparatory behaviours, triggers, the use of death as a narcissistic support, identity choices… METHODS: The data were collected from scientific publications, personal cases, and open source.

RESULTS

Despite the variety of behaviours included in this typology, we were able to identify a few mechanisms that could be found in two types of suicide-homicide [Private suicide-homicide (within the family circle) vs. Public space suicide-homicide (suicide by aircraft, school shooting…)].

DISCUSSION

Suicide-homicide phenomenon is the result of the interaction of societal, ideological, psychopathological and criminological elements which burst out in a lethal and paroxystic gesture. Psychiatrists and psychologists may have an important part to play in modelling a pattern to better understand it.

Violence and mental disorders. A retrospective study of people in charge of a community mental health center

BACKGROUND

Numerous studies conducted in inpatient settings have highlighted how mental disorders are associated with an increased risk of violence, particularly during acute phases. However, to date a more limited number of studies have been performed to assess the risk of violence in outpatients, particularly in Italy. The present study aims to evaluate the prevalence of violent events in a sample of patients in charge of a community mental health center in Italy.

METHODS

Based on data obtained from standardized clinical records, a retrospective study was undertaken to investigate acts of violence (physical aggression only) in a total of 678 patients (Males=308, 45.4%) in charge of a university mental health center; patients were mainly affected by anxiety disorders (30.7%), depressive disorder (17.2%), bipolar disorder (18.3%) and schizophrenia or other psychotic disorders (25.0%).

RESULTS

27.6% of the sample had committed at least one act of violence during their lifetime, 10.5% over the previous year. 56.7% of those who committed violence acts had acted violently twice or more during their lifetime. A significant association of lifetime violence was found with gender (male), younger age, low education, unemployment, living with parents. With regard to diagnosis, a significant association was found with schizophrenia and other psychotic disorders, personality disorders, mental retardation, and comorbidity between two or more psychiatric disorders. Violence was moreover associated with early age at onset and at first psychiatric treatment, longer duration of the disorder, previous hospital admissions, previous violent events.

CONCLUSION

Violent behavior is relatively common among outpatients.

Clinical assessment of psychotic and mood disorder symptoms for risk of future violence

This article reviews important components to consider when evaluating the relationship of psychotic and mood disorder symptoms to violence. Particular attention is given to assessing persecutory delusions and command auditory hallucinations. Clinical implications of research findings to evaluating violence risk in psychiatric patients are reviewed.

Mental disorders and vulnerability to homicidal death: Swedish nationwide cohort study

OBJECTIVE

To determine the risk of people with mental disorders being victims of homicide.

DESIGN

National cohort study.

SETTING

Sweden.

PARTICIPANTS

Entire adult population (n = 7,253,516).

MAIN OUTCOME MEASURES

Homicidal death during eight years of follow-up (2001-08); hazard ratios for the association between mental disorders and homicidal death, with adjustment for sociodemographic confounders; potential modifying effect of comorbid substance use.

RESULTS

615 homicidal deaths occurred in 54.4 million person years of follow-up. Mortality rates due to homicide (per 100,000 person years) were 2.8 among people with mental disorders compared with 1.1 in the general population. After adjustment for sociodemographic confounders, any mental disorder was associated with a 4.9-fold (95% confidence interval 4.0 to 6.0) risk of homicidal death, relative to people without mental disorders. Strong associations were found irrespective of age, sex, or other sociodemographic characteristics. Although the risk of homicidal death was highest among people with substance use disorders (approximately ninefold), the risk was also increased among those with personality disorders (3.2-fold), depression (2.6-fold), anxiety disorders (2.2-fold), or schizophrenia (1.8-fold) and did not seem to be explained by comorbid substance use. Sociodemographic risk factors included male sex, being unmarried, and low socioeconomic status.

CONCLUSIONS

In this large cohort study, people with mental disorders, including those with substance use disorders, personality disorders, depression, anxiety disorders, or schizophrenia, had greatly increased risks of homicidal death. Interventions to reduce violent death among people with mental disorders should tackle victimisation and homicidal death in addition to suicide and accidents, which share common risk factors.

Mental health-related risk factors for violence: using the evidence to guide mental health triage decision making

Mental health clinicians working in emergency crisis assessment teams or mental health triage roles are required to make rapid and accurate risk assessments. The assessment of violence risk at triage is particularly pertinent to the early identification and prevention of patient violence, and to enhancing the safety of clinical staff and the general public. To date, the evidence base for mental health triage violence risk assessment has been minimal. This study aimed to address this evidence gap by identifying best available evidence for mental health-related risk factors for patient-initiated violence. We conducted a systematic review based on the National Health and Medical Research Council of Australia's methodology for systematic reviews. A total of 6847 studies were retrieved, of which 326 studies met the study inclusion criteria. Of these studies, 277 met inclusion criteria but failed the quality appraisal process, thus a total of 49 studies were included in the final review. The risk factors that achieved the highest evidence grading were predominantly related to dynamic clinical factors immediately observable in the patient's general appearance, behaviour and speech. These factors included hostility/anger, agitation, thought disturbance, positive symptoms of schizophrenia, suspiciousness and irritability.

Criminal recidivism in offenders with personality disorders and substance use disorders over 8 years of time at risk

Personality disorders (PD) and substance use disorders (SUD) lead to high violent criminality. The influence of co-morbidity on recidivism remains unclear. Recidivism of 379 offenders was assessed at 8 years of follow-up. Sixty-nine percent of PD+SUD, 45% of SUD- and 33% of PD- subjects showed any recidivism. However, violent recidivism was highest in the PD- group.

[Risk of homicide and major mental disorders: a critical review]

INTRODUCTION

Tragic and high profile killings by people with mental illness have been used to suggest that the community care model for mental health services has failed. It is also generally thought that schizophrenia predisposes subjects to homicidal behaviour.

OBJECTIVE

The aim of the present paper was to estimate the rate of mental disorder in people convicted of homicide and to examine the relationship between definitions. We investigated the links between homicide and major mental disorders.

METHODS

This paper reviews studies on the epidemiology of homicide committed by mentally disordered people, taken from recent international academic literature. The studies included were identified as part of a wider systematic review of the epidemiology of offending combined with mental disorder. The main databases searched were Medline. A comprehensive search was made for studies published since 1990.

RESULTS

There is an association of homicide with mental disorder, most particularly with certain manifestations of schizophrenia, antisocial personality disorder and drug or alcohol abuse. However, it is not clear why some patients behave violently and others do not. Studies of people convicted of homicide have used different definitions of mental disorder. According to the definition of Hodgins, only 15% of murderers have a major mental disorder (schizophrenia, paranoia, melancholia). Mental disorder increases the risk of homicidal violence by two-fold in men and six-fold in women. Schizophrenia increases the risk of violence by six to 10-fold in men and eight to 10-fold in women. Schizophrenia without alcoholism increased the odds ratio more than seven-fold; schizophrenia with coexisting alcoholism more than 17-fold in men. We wish to emphasize that all patients with schizophrenia should not be considered to be violent, although there are minor subgroups of schizophrenic patients in whom the risk of violence may be remarkably high. According to studies, we estimated that this increase in risk could be associated with a paranoid form of schizophrenia and coexisting substance abuse. The prevalence of schizophrenia in the homicide offenders is around 6%. Despite this, the prevalence of personality disorder or of alcohol abuse/dependence is higher: 10% to 38% respectively. The disorders with the most substantially higher odds ratios were alcohol abuse/dependence and antisocial personality disorder. Antisocial personality disorder increases the risk over 10-fold in men and over 50-fold in women. Affective disorders, anxiety disorders, dysthymia and mental retardation do not elevate the risk. Hence, according to the DMS-IV, 30 to 70% of murderers have a mental disorder of grade I or a personality disorder of grade II. However, many studies have suffered from methodological weaknesses notably since obtaining comprehensive study groups of homicide offenders has been difficult.

CONCLUSIONS

There is an association of homicide with mental disorder, particularly with certain manifestations of schizophrenia, antisocial personality disorder and drug or alcohol abuse. Most perpetrators with a history of mental disorder were not acutely ill or under mental healthcare at the time of the offence. Homicidal behaviour in a country with a relatively low crime rate appears to be statistically associated with some specific mental disorders, classified according to the DSM-IV-TR classifications.

Schizophrenia and impulsive aggression: a heuristic inquiry with forensic and clinical implications

Assessment of a violent act committed by an offender with schizophrenia typically focuses on whether the act was due to distortions in thought or perception, i.e., delusions or hallucination. An important but less appreciated feature is the impulsivity of the act, which can have forensic and therapeutic implications. Here a modification of Barratt's classification of aggressive behavior is presented that includes premeditated (instrumental), medical (secondary), impulsive (expressive), and compulsive (instrumental and expressive) aggression. Violence due to a mental condition such as schizophrenia is considered medical, but even aggression motivated by delusions or hallucinations can also be characterized as impulsive, premeditated, or compulsive.Although research on aggression and schizophrenia is limited with regard to the impulsivity-premeditation dimension and difficult to compare, current evidence suggests this to be an important consideration in the assessment of aggression in individuals with schizophrenia, important both forensically and therapeutically. Future research on the impulsive-premeditated quality of aggressive acts by offenders with schizophrenia--research wherein aggressive behavior is defined, situational context is clarified, and diagnostic criteria are explicitly followed--should further refine our understanding of the nature of aggressive acts associated with schizophrenia. Findings from such research will undoubtedly inform assessment, treatment, and forensic relevance of schizophrenia-related physical aggression.

Concurrent crack and powder cocaine users from Sao Paulo: do they represent a different group?

BACKGROUND

Cocaine abuse is a serious and socially damaging illegal drug problem. Different routes of administration are associated with a specific progression of use, different degrees of abuse liability, propensity for dependence and treatment response. There have been relatively few studies comparing different cocaine users groups and no studies into the characterization of the group of individuals reporting concurrent use of powder cocaine and crack cocaine.

METHODS

Six hundred and ninety-nine cocaine users were assessed during the period August 1997 to October 1998 in one outpatient and six inpatient clinics located in the São Paulo, Brazil. Patients were interviewed using a structured questionnaire schedule in Portuguese, designed specifically for the Brazilian population. The statistical analyses were performed using either ANOVA or a chi-squared test and focusing on their preferred form of use/route of administration and other variables.

RESULTS

For 83% of the variables tested in this study, the Dual Users subgroup (using both powder and crack cocaine) demonstrated statistical differences from the single drug user subgroups. Those differences include the initiation of cocaine, the abuse of other illicit drugs, and rates of criminal history.

CONCLUSION

These data suggest cocaine-dependent individuals who report use of both powder and crack cocaine are an at least partially, distinct subgroup. However, further studies will be necessary to confirm this and to determine if they also show a different treatment response.

Clinical and legal characteristics of inmates with bipolar disorder

Individuals with bipolar disorder are at an increased risk of criminal arrest compared with those in the population at large. The combination of manic symptoms and substance abuse seem to be the primary illness factors for this increased risk, and the public mental health system has faced challenges in treating these patients successfully in community settings. To decrease the risk for arrest in bipolar patients, clinicians can screen and refer patients for substance use disorders, stabilize mania in hospital settings, and take measures to improve outpatient adherence in the postmanic hospitalization period. Psychiatric advance directives, new developments in civil commitment law, and mental health courts are legal mechanisms that may be critical in preventing the criminalization of those with bipolar disorder.

Examining anxiety as a predictor of homicidality: a pilot study

Homicidality rates have been shown to be more prominent among persons diagnosed with mental disorders as compared to the general population. However, the role that anxiety plays in homicidal ideation and intent is poorly understood. This study investigated predictors of homicidal intent, thought, or plan in an adult population of psychiatric inpatients diagnosed with anxiety disorders. Results suggest that the factors most strongly associated with homicidality include male gender, substance abuse, mania, and current legal problems. Multiple regression analyses showed that only male gender predicted homicidality when other variables were taken into account.

A City-Level Study of Aggressive Road Behaviours: Magnitude, and Predictors and Implications for Traffic Safety

Road rage and aggressive driving behaviours are reported to be huge public problems. There is a paucity of scientific South African data on driver aggression. Accordingly, a cross-sectional descriptive study was undertaken to determine the nature, extent and profile of aggressive and other hazardous road behaviours. The different categories of aggressive road behaviours were located on a continuum comprising four levels. Together with other hazardous driving behaviours, they were measured using a modified semantic differential on a scale of 1 to 10. Additionally, multiple linear regression modelling was used to identify various predictor variables for the different levels of aggressive road behaviour. The high prevalence data as well as many of the predictors of aggressive road behaviours that were found in the study are consistent with international findings. The utility of the data is discussed as part of a recommended ecological and health promotion approach for the prevention of aggressive road behaviours.

New evidence or changing population? Reviewing the evidence of a link between mental illness and violence

There has been an apparent shift in majority opinion within psychiatry over the last 20 years on the nature of the relationship between mental illness and violence. Where once there was perhaps widespread scepticism, research, while sometimes producing conflicting results, appears ultimately to have led to the emergence of an almost universal consensus that there is a link. This paper will review the nature of the evidence for such a link between mental illness and violence and explore some of the newer suggestions about why mental illness may sometimes be related to violence.

Pharmacological treatment of psychotic agitation

The presentation of agitated psychotic patients to psychiatric emergency services is a common occurrence. The traditionally accepted treatment for such patients involves the use of a typical antipsychotic, generally haloperidol. More recently benzodiazepines, such as lorazepam, have been used in combination with antipsychotics due to their sedative properties and relatively benign adverse effect profiles. Standard clinical protocol at many institutions involves the intramuscular administration of 5 to 10mg of haloperidol and 1 to 2mg of lorazepam. Atypical antipsychotics have gained acceptance as first-line treatments for psychotic disorders. These drugs are seen as an improvement over traditional antipsychotics because of their increased efficacy and reduced extrapyramidal effects. The utility of atypical antipsychotics in the emergency setting has been relatively unexplored because slow titration schedules or dose-limiting adverse effects for some members of the class have made this form of treatment impractical. However, the recent availability of oral liquid and rapidly dissolving tablet preparations of some atypical agents has provided useful alternatives in some cases. Nevertheless, for many patients a parenteral drug is the only desirable or feasible treatment option. Intramuscular preparations of the atypical antipsychotics olanzapine and ziprasidone have been developed, and are close to launch in the US. The availability of a rapid-acting intramuscular preparation of an atypical antipsychotic could represent a significant advancement in the treatment of agitation associated with psychosis.

PSYCHOMETRIC PROPERTIES AND CONSTRUCT VALIDITY OF A SPANISH LANGUAGE SCALE FOR SCREENING ANTISOCIAL PERSONALITY

The psychometric properties and construct validity of a Spanish self-report scale for screening antisocial personality (ASP) are evaluated. Evidence for validity was sought by comparing a household and an emergency room (ER) sample. Nine hundred and twenty men and women were part of a multistage, stratified, probability sample drawn from all 18–65 year olds in a city in Mexico. ER participants were 1511 patients 18–65 years of age sampled from the three main hospital emergency rooms in that city. Results suggest an adequate internal consistency and a one-factor structure. Significantly more ASP cases were identified in the ER compared to the household sample, the injured compared to the household sample, the injured compared to the sick, in those whose injuries involved violence, those who had used drugs in the previous 12 months, those who were moderate to heavy drinkers, and those who were alcohol dependent. The advantages and limitations of the scale are discussed. Limitations notwithstanding, the evidence suggests that as an initial evaluation, the Spanish Language Screen for Antisocial Personality could be valuable for reaching large Spanish-speaking populations.

A double-blind, randomized comparison of the efficacy and safety of intramuscular injections of olanzapine, lorazepam, or placebo in treating acutely agitated patients diagnosed with bipolar mania

There are no rapid-acting intramuscular formulations of atypical antipsychotics available for quickly calming an agitated patient with bipolar disorder. In this study, 201 agitated patients with bipolar mania were randomly assigned to receive one to three injections of the atypical antipsychotic olanzapine (10 mg, first two injections; 5 mg, third injection), the benzodiazepine lorazepam (2 mg, first two injections; 1 mg, third injection), or placebo (placebo, first two injections; olanzapine, 10 mg, third injection) within a 24-hour period. Agitation was measured at baseline, every 30 minutes for the first 2 hours, and at 24 hours after the first injection using the Positive and Negative Syndrome Scale-Excited Component subscale and two additional agitation scales. At 2 hours after the first injection, patients treated with olanzapine showed a significantly greater reduction in scores on all agitation scales compared with patients treated with either placebo or lorazepam. At 24 hours after the first injection, olanzapine remained statistically superior to placebo in reducing agitation in patients with acute mania, whereas patients treated with lorazepam were not significantly different from those treated with placebo or olanzapine. Furthermore, no significant differences among the three treatment groups were observed in safety measures, including treatment-emergent extrapyramidal symptoms, the incidence of acute dystonia, or QTc interval changes. These findings suggest that intramuscular olanzapine is a safe and effective treatment for reducing acute agitation in patients with bipolar mania.

High dose cocaine use in São Paulo: a comparison of treatment and community samples

This cross-sectional study investigates patterns of drug use and associated problems among 332 cocaine users from treatment and community samples in São Paulo, Brazil. Data were collected using a structured questionnaire and the Severity of Dependence Scale (SDS). The majority were regular users of high doses of smoked cocaine. After controlling for severity of cocaine use, users in the community were found to be more involved in illegal activities, more likely to report adverse effects of cocaine, to be involved in prostitution, and to have lived on the streets. Better methods are required to provide interventions to tackle the problems and risk behaviors of these cocaine users.

Psychosis and offending in British Columbia: characteristics of a secure hospital population

INTRODUCTION: There is an increased likelihood of violence in the mentally ill although the risk is small. AIMS: The study aimed to ascertain the features in a secure hospital population that linked offending and mental illness. METHOD: A survey of patients in the high security hospital serving the province of British Columbia in Canada was carried out. Information on 175 mentally disordered offenders was extracted and included demographic data and specific characteristics of their offences, diagnoses and psychotic symptoms. RESULTS: The most prevalent offences were crimes of violence, but 39% of patients were not primarily violent offenders. Almost two-thirds (61%) had two or more diagnoses. A large majority of the patients were psychotic, schizophrenia being the most common diagnosis. There was a highly significant association between psychosis and violence, but the strength of the association was not increased by the presence of imperative hallucinations or delusions. The sample comprised various ethnic groups, one of which, Native Americans, was over-represented. However, no association was found between violent offending and ethnicity, or age or years of illness. DISCUSSION: The study replicates previous findings of the link between violent offending and psychosis, but not a specific link between violent offending and psychotic drive. A surprising finding was a lack of association between violent offences and substance misuse.

Death by homicide in Italy, 1980-94: age and gender differences among victims

To investigate the role of sociodemographic factors in the risk of death by homicide in Italy, official statistics from 1980 to 1994 concerning death by homicide have been studied. Homicide rates increase from 1980 to 1994 for males and, to a much lesser extent, for females. Clear differences exist by age and gender, with rates peaking in both genders at young adult age (25-34) and men having five times higher rates than women. Mean rate in the general population is 1.98 per 100,000, one of the highest rates in the civilized world. These findings are mostly influenced by higher homicide rates for both males and females in southern regions, where cultural attitudes towards violence, linked to the greater diffusion of criminal organizations, greatly influence the risk of death by homicide. About 75% of homicides involve firearms: clearly in Italy availability of lethal weapons is a key factor in homicide. Intervention aimed at increasing community awareness of the causes and methods of prevention of violence (including the roles of substance abuse and social inequality) are needed if adequate policies are to be developed to reduce the risk of death by homicide. Differences in homicide rates across countries clearly indicate that homicide is a preventable cause of death.

Criminal activities and substance use of patients with major affective disorders and schizophrenia: a 2-year follow-up

BACKGROUND

Compelling findings demonstrate that persons who develop major mental disorders, as compared to those who do not, are at increased risk to commit non-violent and violent crimes. This conclusion has recently been shown to apply to persons with major affective disorders.

METHODS

Thirty males with major affective disorders and 74 with schizophrenia were followed for 2 years. At discharge, patients were intensively assessed including diagnoses using SADs and RDC. During follow-up, alcohol and drug use were measured, subjectively and objectively. At discharge, the two groups were similar as to secondary diagnoses of antisocial personality disorder, drug abuse/dependence, socio-demographic characteristics, and criminal history, but more of the patients with major affective disorders than those with schizophrenia had a history of alcohol abuse/dependence. During the follow-up period, the two groups were similar as to rehospitalization, treatment intensity, and substance use.

RESULTS

By the end of the follow-up period, 33% of the patients with major affective disorders and only 15% of those with schizophrenia had committed crimes, most violent. Co-morbid antisocial personality disorder was associated with criminality among the patients with schizophrenia but not among those with major affective disorders. Among these latter patients, drug use and the intensity of out-patient care were associated with violent criminality.

LIMITATIONS

The small number of subjects limited the conclusions.

CONCLUSIONS

Violent behavior among patients with major affective disorders may not be uncommon and may be preventable by out-patient treatment which limits drug use.

Criminal and violent behavior in schizophrenic patients: an overview

An overview of the most important older and newer results regarding the relationship between violent and criminal behavior on the one hand and schizophrenic illness on the other hand is presented. Four different methods are available to study this relationship: (i) study of the prevalence of mental illness in criminal/violent populations; (ii) study of criminality/violence rate in samples of psychiatric patients; (iii) study of criminality/violence in community samples comparing mental patients with non-patient community residents; and (iv) study of criminality/violence in birth cohorts prospectively. All these methods have been used; but samples composed of schizophrenic patients exclusively were only exceptionally studied. The results indicate that there is a modest but significant relationship between schizophrenia and violence and crime which persists even after controlling for demographic and socio-economic variables. The probability of schizophrenic patients to be criminal or violent depends on the acuity of their illness and is increased by their use of psychoactive substances. Generally, however, violent and criminal acts directly attributable to mental illness account only for a very small proportion of such acts in the society.