National and regional prevalence of interpersonal violence from others' alcohol use: a systematic review and modelling study

Background

While alcohol use is an established risk factor for interpersonal violence, the extent to which people are affected by interpersonal violence from others' drinking has not yet been quantified for different world regions. This modelling study aims to provide the first estimates of the national and regional prevalence of interpersonal violence from others' drinking.

Methods

An international systematic literature search (02/28/2023, Prospero: CRD42022337364) was conducted to identify general adult population studies assessing the prevalence of interpersonal violence from others' drinking with no restrictions to publication date or language. Reports that did not provide data on interpersonal violence from others' drinking (primary outcome), were no original research studies, or captured a selected group of people only, were excluded. Observed prevalence data were extracted and used to build fractional response regression models to predict past-year prevalence of emotional and physical violence from others' drinking in 2019. Random-effects meta-regression models were used to aggregate the observed prevalence of sexual and intimate partner violence. Study risk of bias (ROB) was assessed using a modified version of the Newcastle-Ottawa Scale.

Findings

Out of 13,835 identified reports, 50 were included covering just under 830,000 individuals (women: 347,112; men: 322,331; men/women combined: 160,057) from 61 countries. With an average prevalence of 16·8% (95% CI: 15·2-18·3%) and 28·3% (95% CI: 23·9-32·4%) in men and women combined in the GBD super regions High Income and Central Europe, Eastern Europe, & Central Asia, respectively, emotional violence was the most common form of interpersonal violence from others' drinking. Physical violence averaged around 3% (women) and 5% (men) in both regions. The pooled prevalence of sexual violence from others' drinking in men and women was 1·3% (95% CI: 0·5-3·3%, 95% PI: 0·1-16·9%) and 3·4% (95% CI: 1·4-8·3%, 95% PI: 0·2-35·3%), respectively, and ranged between 0·4% (95% CI: 0·1-1·6%, 95% PI: 0·0-7·3%) and 2·7% (95% CI: 1·1-6·3%, 95% PI: 0·2-30·0%) for different forms of intimate partner violence. ROB was moderate or critical for most reports; accounting for critical ROB did not substantially alter our results.

Interpretation

The share of the population experiencing harms from others' drinking is significant and should be an integral part of public health strategies.

Funding

Research reported in this publication was supported by the Canadian Institutes of Health Research (CIHR; grant: CIHR FRN 477887).

Population-Level Alcohol Consumption and Homicide Rates in Latin America: A Fixed Effects Panel Analysis, 1961-2019

Latin America and the Caribbean (LAC) possesses 8 per cent of the global population but approximately one-third of global homicides. The region also exhibits high per capita alcohol consumption, risky drinking patterns and a heterogeneous mix of beverage preferences. Despite this, LAC violence receives limited attention in the English-language literature and there are no studies of the population-level alcohol-homicide association in the region. We examined the effects on total, male and female homicide rates of total and beverage-specific alcohol consumption (22 nations, 1961-2019) and of risky drinking patterns (20 nations, 2005 and 2010). We collected homicide and alcohol data from the World Health Organization. Panel fixed effects models showed (1) per capita total and wine consumption were positively associated with total, male and female homicide rates, though effects were much stronger for males, (2) per capita beer consumption was positively associated with total and male homicide rates, (3) per capita spirits consumption was not associated with homicide rates, and (4) nations with riskier drinking patterns had higher total, male and female homicide rates than those with less risky drinking patterns.

Opioid mortality, public health care expenditures, and cross-national homicide rates: findings from 25 OECD countries, 2000-2017

PURPOSE

This study assesses the relationship between opioid mortality and homicide rates across 25 member countries of the organization for economic co-operation and development (OECD) over time and investigates the role of country-level public health expenditures in this relationship.

METHODS

Fixed effects linear regression is used to assess the longitudinal association between opioid mortality and cross-national homicide rates in 25 OECD countries between 2000 and 2017. Moderation analyses are conducted to assess the interaction between opioid mortality rates and public health expenditures per capita.

RESULTS

Study findings revealed a positive bivariate association between opioid mortality and homicide rates. However, this association became null after controlling for public health expenditures. Moderation analyses revealed that there is a strong positive association between opioid mortality and homicide rates when public health expenditures are low, which becomes gradually weaker at higher levels of health expenditures.

CONCLUSION

This study suggests one consequence of the opioid epidemic may be increased homicide rates, and this association is stronger in countries with lower public health expenditures. These findings highlight the potential role of governments to combat the associated harms of rising opioid use through greater investments in public health care.

Alcohol, Aggression, and Violence: From Public Health to Neuroscience

Alcohol has been associated with violent crimes and domestic violence across many nations. Various etiological factors were linked to chronic alcohol use and violence including psychiatric comorbidities of perpetrators such as personality disorders, mood disorders, and intermittent explosive disorders. Aggression is the precursor of violence and individuals prone to aggressive behaviors are more likely to commit impulsive violent crimes, especially under the influence of alcohol. Findings from brain studies indicate long-term alcohol consumption induced morphological changes in brain regions involved in self-control, decision-making, and emotional processing. In line with this, the inherent dopaminergic and serotonergic anomalies seen in aggressive individuals increase their susceptibility to commit violent crimes when alcohol present in their system. In relation to this, this article intends to investigate the influence of alcohol on aggression with sociopsychological and neuroscientific perspectives by looking into comorbidity of personality or mood disorders, state of the mind during alcohol consumption, types of beverages, environmental trigger, neurochemical changes, and gender differences that influence individual responses to alcohol intake and susceptibility to intoxicated aggression.

Analysis of Suicide Methods and Substances Influencing the State of Consciousness of Their Victims in Poland

An integral part of the World Health Organization's (WHO) mental health action plan for 2013-2020 is suicide prevention, and a 10% reduction in the suicide rate. A key element of the preventive measures taken is, among other things, limiting access to means enabling and facilitating committing suicide. However, this requires detailed knowledge of community suicide patterns and preferences. Unfortunately, such information is not usually collected, and the recorded method of committing suicide is often imprecise and untrue, which means that such knowledge has limited application in presuicidal prophylaxis. The statistical data on suicides recorded as part of the Police Statistics in Poland during the years 2009-2019 was analyzed. The analysis included suicide deaths and suicide attempts, taking into account the suicide methods and substances influencing the state of consciousness of their victims. The number of suicides in Poland in the analyzed period tended to increase. The most common method of suicide was hanging, and alcohol was the substance influencing the state of consciousness of suicide victims. The statistics for 2017-2019 showed the presence of new methods of suicide, such as taking drugs other than hypnotics, intoxication with narcotic drugs, poisoning with designer drugs, suffocation and self-immolation, as well as new psychoactive substances affecting the state of consciousness of victims, i.e., drugs and narcotic drugs. The effectiveness of actions taken in Poland in the field of suicide prevention does not bring the desired effects, as evidenced by growing number of suicides. This low effectiveness is mainly due to the lack of a national suicide prevention strategy. The effectiveness of these activities may be improved by creating a uniform database of suicides, which is a source of reliable information which will allow the taking of actions aimed at limiting the availability of means enabling and facilitating the committing of suicide. The study aimed to analyze the types of suicide methods and substances influencing the state of consciousness of their victims in Poland in the years covered by the study.

The contribution of age structure to the international homicide decline

Background

Since 1990, the world’s homicide rate has declined by nearly 20%. While prior research has documented parallel homicide declines across many individual countries, the causes of a shared international homicide decline remain unknown. Drawing on a worldwide process of population ageing, and on research linking age to criminal activity, this study investigates the contribution of global demographic shifts to the international homicide decline.

Methods

We draw from (1) a High Coverage Sample of 126 countries since 1990, and (2) a Long Series Sample of 26 countries since 1960 and utilize fixed-effect regressions to evaluate the impact of age structure on homicide trends. In addition, we use a quantile regression to explore variations in the relationship between age structure and homicide conditional on homicide levels.

Findings

Results using the High Coverage Sample suggest no relationship between age structure and homicide. However, results from the Long Series Sample suggest that changes in the relative size of countries’ youth population is a major predictor of homicide trends since 1960. In exploring this divergence, we find that the influence of age structure on homicide becomes less evident as other risk factors for violence gain prominence. Thus, while high homicide countries had the most to gain from falling homicide rates, the safety benefits of an ageing population have been concentrated among the least violent countries.

Interpretation

While the homicide declines of individual countries have often been attributed to domestic policies, the universality of international homicide trends suggests the influence of broader global phenomenon. We find that countries’ homicide trends are strongly associated with changes in the size of their youth populations, particularly where there are few competing criminogenic forces. Based on these results, we propose an explanation for the international homicide decline, while highlighting the importance of demographic patterns in explaining homicide trends.

A Cross-National Analysis of Alcohol Consumption and Suicide Rates: Variations by Population-Level Drinking Patterns

This study assesses the association between the population-level consumption of different types of alcohol and cross-national suicide rates and examines whether this association is moderated by country-specific drinking patterns. We apply negative binomial regression to test whether the consumption of beer, wine, or spirits is predictive of suicide rates. Next, we use interaction terms to examine whether the effect of beverage-specific consumption on suicide rates is moderated by total alcohol consumption, prevalence of consumption, or the riskiness of drinking patterns. We find that only spirit consumption has a positive and statistically significant association with suicide rates. The effect of spirit consumption on suicide is higher among countries where the total alcohol consumption and the prevalence of alcohol consumption are lower, and patterns of drinking are riskier. Future research should continue to investigate this relationship to develop interventions that reduce suicide mortality related to alcohol use.