Civil commitment law, mental health services, and US homicide rates

How firearm legislation impacts firearm mortality internationally: A scoping review

Background

The literature on gun violence is broad and variable, describing multiple legislation types and outcomes in observational studies. Our objective was to document the extent and nature of evidence on the impact of firearm legislation on mortality from firearm violence.

Methods

A scoping review was conducted under PRISMA-ScR guidance. A comprehensive peer-reviewed search strategy was executed in several electronic databases from inception to March 2024. Grey literature was searched for unpublished sources. Data were extracted on study design, country, population, type of legislation, and overall study conclusions on legislation impact on mortality from suicide, homicide, femicide, and domestic violence. Critical appraisal for a sample of articles with the same study design (ecological studies) was conducted for quality assessment.

Findings

5057 titles and abstracts and 651 full-text articles were reviewed. Following full-text review and grey literature search, 202 articles satisfied our eligibility criteria. Federal legislation was identified from all included countries, while state-specific laws were only reported in studies from the U.S. Numerous legislative approaches were identified including preventative, prohibitive, and more tailored strategies focused on identifying high risk individuals. Law types had various effects on rates of firearm homicide, suicide, and femicide. Lack of robust design, uneven implementation, and poor evaluation of legislation may contribute to these differences.

Interpretation

We found that national, restrictive laws reduce population-level firearm mortality. These findings can inform policy makers, public health researchers, and governments when designing and implementing legislation to reduce injury and death from firearms.

Funding

Funding is provided by the Strategy for Patient-Oriented Research (SPOR) Evidence Alliance and in part by St. Michael's Hospital, University of Toronto.

Scoping review registration

Open Science Framework (OSF): https://osf.io/sf38n.

Homicide associated with psychotic illness: What global temporal trends tell us about the association between mental illness and violence

Available evidence suggests that persons with serious forms of mental illness are 4-10 times more likely to commit homicide as compared to non-affected members of the general population. The relationship between homicide and psychotic illness has now been subject to longitudinal investigation in six different populations across eight studies covering time periods over the last six decades. With the exception of one study, these investigations demonstrate that homicide associated with psychotic illness appears relatively stable through time and, in most populations, is not related to factors that contribute to the rise and fall of total population homicide (TPH) rates. This suggests that illness and treatment factors are of most importance if we are to reduce the prevalence of this tragic illness complication.

Forty-year study of rates of homicide by people with schizophrenia and other homicides in the Chuvash Republic of the Russian Federation

BACKGROUND

The extent to which rates of homicide by people with or without schizophrenia vary over time has theoretical and practical implications in understanding homicide by people with mental illness.

AIMS

The aim was to report on the rates of homicide by people diagnosed with schizophrenia over time in a region in which there were dramatic changes in the overall rates of homicide.

METHODS

An examination of homicide by people diagnosed with schizophrenia in the course of judicial psychiatric examination, and the rate of other homicide in the Chuvash Republic of the Russian Federation between 1981 and 2020 was undertaken.

RESULTS

During the 40 years of the study a total of 5741 people faced legal proceedings for a homicide offence, of whom 179 (3.1%) were diagnosed with schizophrenia. During the study period the average annual total homicide rate rose from about 9 per 100 000 in the 1980s, peaked at 17 per 100 000 in the 1990s before falling to 13 per 100 000 in the 2000s and 6 per 100 000 in the 2010s. Rates of homicide by people with schizophrenia also rose and fell over this period and were significantly associated with the rates of other homicide (r = 0.503, d.f. = 38, P = 0.001).

CONCLUSIONS

The rise and fall in rates of homicide by people diagnosed with schizophrenia in parallel to total homicide suggests that homicidal behaviour might not be intrinsic to the clinical manifestations of the illness, and might instead reflect a heightened vulnerability to social factors that are associated with homicide by people without schizophrenia.

The utility of outpatient commitment: Reduced-risks of victimization and crime perpetration

BACKGROUND

Outpatient civil commitment (OCC) provisions, community treatment orders (CTOs) in Australia and Commonwealth nations, are part of mental health law worldwide. This study considers whether and by what means OCC provides statutorily required "needed-treatment" addressing two aspects of its legal mandate to protect the safety of self (exclusive of deliberate-self-harm) and others.

METHOD

Over a 12.4-year period, records of hospitalized-psychiatric-patients, 11,424 with CTO-assignment and 16,161 without CTO-assignment were linked to police-records. Imminent-safety-threats included perpetrations and victimizations by homicides, rapes, assaults/abductions, and robberies. "Need for treatment" determinations were validated independently by Health of the Nations Scale (HoNOS) severity-score-profiles. Logistic regressions, with propensity-score- adjustment and control for 46 potential confounding-factors, were used to evaluate the association of CTO-assignment with occurrence-risk of perpetrations and victimizations.

RESULTS

CTO-assignment was associated with reduced safety-risk: 17% in initial-perpetrations, 11% in initial-victimizations, and 22% for repeat-perpetrations. Each ten-community-treatment-days in interaction with CTO-assignment was associated with a 3.4% reduced-perpetration-risk. CTO-initiated-re-hospitalization was associated with a 13% reduced-initial-perpetration-risk, a 17% reduced-initial-victimization-risk, and a 22% reduced-repeat-victimization-risk. All risk-estimates appear to be the unique contributions of the CTO, CTO-initiated-re-hospitalization, or the provision of ten-community-treatment-days-i.e. after accounting for the influence of prior crimes and victimizations, ethnic-bias, neighborhood disadvantage and other between-group differences in the analysis.

CONCLUSIONS

CTO assignment's association with reduced criminal-victimization and perpetration-risk, in conjunction with requiring participation in needed-treatment via re-hospitalization and community-service, adds support to the conclusion that OCC is to some extent fulfilling its legal objectives related to protecting safety of self (exclusive of deliberate-self-harm), and others.

Time Trends in Homicide and Mental Illness in Ontario from 1987 to 2012: Examining the Effects of Mental Health Service Provision

OBJECTIVE

We examine the association between rates of homicide resulting in a mental health disposition (termed mentally abnormal homicide [MAH]) and homicides without such a disposition, as well as to province-wide psychiatric hospitalisation and incarceration rates.

METHOD

In this population-based study, we investigate all adult homicide perpetrators ( n = 4402) and victims ( n = 3783) in Ontario from 1987 to 2012. We present annual rates of mentally abnormal and non-mentally abnormal homicide and position them against hospitalisation and incarceration rates.

RESULTS

Among the total sample of homicide accused, 3.7% were mentally abnormal. Most (82.5%) had a psychotic disorder at the time of the offense. Contrasted with declining hospitalisation, incarceration, and population homicide rates, the rate of MAH remained constant at an average of .07 perpetrators per 100,000 population. The rate of MAH was not associated with discharges from or average length of stay in psychiatric hospitals (ρ = 0.10; 0.34, P > 0.10), incarceration rates (ρ = 0.16, P = 0.42), or the total homicide rate (ρ = 0.25, P = 0.22). The proportion of MAH perpetrators with a substance use disorder increased modestly over time (β = 0.35, R2 = 0.12, P = 0.08).

CONCLUSIONS

The rate of MAH has not changed appreciably over the past 25 years. Declining psychiatric service utilisation was not associated with the rate of homicide committed by people with mental illness and, secondarily, was not linked to increases in the population homicide or incarceration rates. Substance use has become a more prevalent problem for this population.

A comparison of hospital and community stay in patients who underwent compulsory admission before and after the 2007 Amendment to the Mental Health Act in Taiwan

OBJECTIVE

The main purpose of this study was to assess the empirical findings of compulsory admission for psychiatric disorders before and after the 2007 amendment to the Mental Health Act in Taiwan.

METHODS

A matched case-control study design was applied. Participants were selected using the National Health Insurance Research Database (NHIRD) in Taiwan. The control and case data were collected in 2006 and 2011, and the number of compulsory admission cases was recorded with a case-control ratio of 1:4, along with information on age (±3 years) and gender. In 2006, the number of patients recruited was 9265, including 1853 compulsorily admitted patients and 7412 voluntarily admitted patients. In 2011, the number of patients recruited was 4505, including 901 compulsorily admitted patients and 3604 voluntarily admitted patients.

RESULTS

The data collected for the patients who underwent compulsory admission before and after the amended Mental Health Act included gender, diagnosis, Charlson Comorbidity Index Score (CCIS), length of stay in an acute hospital ward (days), hospital accreditation level, ownership, teaching hospital status, psychiatrist gender and age, and hospital location. Although the number of compulsory admission cases (1853 vs. 901) markedly decreased and the length of stay in an acute hospital ward (30.7 ± 25.0 days vs. 39.0 ± 22.6 days) increased from 2006 to 2011, the readmission rate was reduced from 52.6% in 2006 to 42.5% in 2011.

CONCLUSIONS

The average lengths of hospital stay and community survival time were greater for compulsorily admitted patients than those for voluntarily admitted patients. This result might be attributed to a number of changes implemented since the 2007 amendment of the Mental Health Act, including a strict review process for compulsory admissions and a new discharge planning process, which require further research for approval.

The Utility of Outpatient Commitment: II. Mortality Risk and Protecting Health, Safety, and Quality of Life

OBJECTIVE

This study assessed the contribution of a form of outpatient commitment-community treatment orders (CTOs)-to mortality risk and quality of life of patients with severe mental illness.

METHODS

Data (2000--2012) were obtained from the Australian National Death Index, Victoria Department of Health, Victoria police records, and National Outcomes and CaseMix Collection quality-of-life records for patients in the Victorian Psychiatric Case Register/RAPID with a history of psychiatric hospitalization: CTO cohort, N=11,424; non-CTO cohort, N=16,161. The contribution of CTOs to mortality risk associated with CTO facilitation of access to general medical care and prevention of criminal involvement was assessed with logistic regression models. Cohort differences in quality of life were also examined.

RESULTS

A total of 2,727 patients (10%) in the overall sample died, and the sample had a higher mortality risk than the general population. Probability of death by any cause was 9% lower in the CTO cohort than in the non-CTO cohort. Facilitation of access to medical care accounted for a 20% reduction in risk of non-injury-related deaths in the CTO cohort, compared with the non-CTO cohort. Risk of death by self-harm was 32% higher, compared with the non-CTO cohort. CTO placement appeared to lead to a gain of 3.8 years of life among men and 2.4 years among women, compared with the non-CTO cohort. Quality-of-life scores were modestly less favorable for the non-CTO cohort.

CONCLUSIONS

CTO placement was associated with lower mortality risk via facilitated access to medical care and with modest enhancement of quality of life.

Antecedents, Behaviours, and Court Case Characteristics and Their Effects on Case Outcomes in Litigation for Persons with Schizophrenia

A 10% random sample of 3543 cases litigated in the United States' civil and criminal courts were analysed using logistic regression to develop a model that can predict case outcomes for litigants with schizophrenia. Most predictors are related to case characteristics and not to the litigants' antecedents, behaviours or medication issues. Only the psychologist as an expert witness was found to be related to case outcome, but the concern is expressed that inadequate weight is given to expert testimony. Other significant findings include being represented by counsel, atypical medication and malingering.