A systematic review of the causes and prevention strategies in reducing gun violence in the United States

Recommendations for the Clinician Role in Reducing Gun Violence

There is a growing need for clear and definitive guidelines to prevent firearm violence in communities across the United States. Recommendations explore the utility and feasibility of universal screenings and recommend utilizing universal screening due to a lack of a clear risk to it. Providers should also work to create risk reduction plans with patients as well. Furthermore, recommendations for mental health care, counseling, and bystander training are made for institutions and their providers.

Shots fired: evaluation of vascular injury, compartment syndrome, and transfusion rates among civilian ballistic orthopaedic fracture patients presenting to two Level I trauma centres

PURPOSE

This study investigates baseline patient demographics and predictors of vascular injury, blood transfusion, and compartment syndrome in patients with orthopaedic fractures secondary to GSWs at two high-volume Level I trauma centres.

METHODS

A retrospective chart review of all GSW-related trauma patients at two Level I trauma centres between July 2019 and September 2021 was conducted. Chi-squared and two-tailed independent t tests were used for data analysis, and logistic regression with odds ratios (OR) determined predictors of primary outcomes.

RESULTS

Among 478 GSW patients, 94 (19.7%) sustained 130 orthopaedic fractures, most commonly at the lower extremity (77.7%). Orthopaedic fracture patients showed significantly higher rates of vascular injury (29.8 vs. 4.7%, p < 0.001), transfusion (27.7 vs. 12.8%, p = 0.006), and compartment syndrome (3.2 vs. 0.3%, p = 0.011) compared to non-orthopaedic injury patients. Univariable analysis identified ankle (OR = 47.50, p < 0.001) and hip/femur fractures (OR = 5.31, p < 0.001) as predictors of vascular injury. Multivariable logistic regression revealed lower extremity vascular injury (OR = 54.69, p = 0.006) and anatomic fracture sites of the humerus (OR = 15.17, p = 0.008), clavicle/scapula (OR = 11.30, p = 0.009), and acetabulum/pelvis (OR = 7.17, p = 0.025) as predictors of blood transfusion. Univariable analysis showed lower extremity vascular injury (OR = 30.14, p = 0.007) as a predictor of compartment syndrome.

CONCLUSION

These findings underscore the importance of diagnosing and managing vascular injuries and compartment syndrome in GSW-related orthopaedic fractures, emphasizing the necessity for targeted transfusion strategies in such cases.

A social problem analysis of the 1993 Brady Act and the 2022 Bipartisan Safer Communities Act

In June 2022, the U.S. federal government passed its first major firearm policy since the Brady Handgun Violence Prevention Act of 1993, the Bipartisan Safer Communities Act (BSCA). Summative content analysis was used to explore how the social problem of firearm violence was outlined in both policies, with the goal of extracting the social issue's definition from the policies' approaches to solving it. Both policies do not outline the various types of firearm violence, nor the disproportionate effect of firearm violence on certain populations. This work informs the role of federal policy in defining and monitoring firearm violence as a public health issue, identifying both individual and structural risk and protective factors from an asset-based lens, and allocating preventative efforts in communities that are most affected.

Firearm-Related Traumatic Brain Injuries in Adults: A Scoping Review

BACKGROUND AND OBJECTIVES

Firearm-related traumatic brain injury (TBI) has emerged as a significant public health issue in the United States, coinciding with a rapid increase in gun-related deaths. This scoping review aims to update our understanding of firearm-related TBI in adult populations.

METHODS

A comprehensive search of 6 online databases yielded 22 studies that met the inclusion criteria. The reviewed studies predominantly focused on young adult men who were victims of assault, although other vulnerable populations were also affected.

RESULTS

Key factors in evaluating patients with firearm-related TBI included low Glasgow Coma Scale scores, central nervous system involvement, hypotension, and coagulopathies at presentation. Poor outcomes in firearm-related TBIs were influenced by various factors, including the location and trajectory of the gunshot wound, hypercoagulability, hemodynamic instability, insurance status, and specific clinical findings at hospital admission.

CONCLUSION

Proposed interventions aimed to reduce the incidence and mortality of penetrating TBIs, including medical interventions such as coagulopathy reversal and changes to prehospital stabilization procedures. However, further research is needed to demonstrate the effectiveness of these interventions. The findings of this scoping review hope to inform future policy research, advocacy efforts, and the training of neurosurgeons and other treating clinicians in the management of firearm-related TBI.

Association Between Social Vulnerability Index and Hospital Readmission Following Gunshot Injuries

INTRODUCTION

No association regarding classification of social vulnerability and outcomes of patients with gunshot injury have been described. Our goal was to assess whether the socioeconomic vulnerability index (SVI), is associated with an increased risk of hospital readmission following gunshot wounds.

METHODS

We conducted an exploratory retrospective cohort study on Massachusetts patients with trauma following gunshot wounds from January 1, 2012 to December 31, 2020 using the institutional trauma registry. We estimated the association between high social vulnerability (defined by the Centers for Disease Control and Prevention as ≥90th percentile) and incidence of all-cause readmission at 30, 60, and 90 d (overall and stratified over sex, race, and age groups). Estimates from unadjusted log-binomial regression were reported using relative risks (RRs) and 95% confidence intervals. Time-to-event (readmission) was assessed using Kaplan-Meier plots.

RESULTS

A total of 386 patients were included for analysis: 211 (55%) with SVI <0.90 and 175 (45%) with SVI ≥0.90. The mean (standard deviation) age was 29 (13) y, with majority being male (89%). There was no strong risk of readmission associated with SVI ≥0.90; the interval with the greatest risk was at 60 d (RR = 1.34; 95% confidence interval [0.73, 2.45]). Among stratified analyses, the strongest associations were observed when restricting to young adults (aged 18-35) with RRs of 2.49, 2.62, and 2.45 for 30, 60, and 90 d readmission, respectively.

CONCLUSIONS

Overall, high SVI was not associated with all-cause readmission; however, subanalyses suggest an association among young adults. Future research should explore SVI as a tool for identifying patients with trauma at risk for readmission.

Disadvantaged Neighborhoods Continue to Bear the Burden of Gun Violence

INTRODUCTION

Gun violence is a pervasive and dynamic public health crisis causing substantial burden on communities and healthcare systems in the United States. Risk factor and outcome analyses are crucial to develop effective interventions. The aim of this study was to assess firearm injury in a diverse community setting as it relates to neighborhood socioeconomic disadvantage and changes over time following large-scale local interventions.

METHODS

All county residents with firearm injury presenting to a Level 1 Trauma Center from January 2012 to December 2021 were retrospectively reviewed. Area Deprivation Index (ADI) was used to measure neighborhood socioeconomic disadvantage based on a nine-digit zip code at patients' home address. Injuries were also stratified by 5-year time periods, 2012-2016 and 2017-2021. Demographics and clinical data were analyzed including injury severity, hospital course, and discharge location. Data were compared by ADI quintile and between time periods using chi-squared, one-way analysis of variance, and Cochran-Armitage test.

RESULTS

A total of 1044 injuries were evaluated. Patients were 93% male with mean age of 29 y (standard deviation 10.2) and were concentrated in the most disadvantaged neighborhoods (74% ADI Q5). Black or African American race was greater in the most disadvantaged ADI groups (76% versus 47%-66%; P <0.001). Percentage of total injuries in the most disadvantaged ADI group rose from 71% to 78% over time (P = 0.006). Mortality occurred in 154 (15%) patients overall, while most (71%) were discharged to home. Mortality declined from 18% to 11% over time (P <0.001). Medicaid utilization rose from 42% to 77% alongside a decrease in self-pay status from 44% to 4% (P <0.001). There were no clinically significant group differences in injury severity or clinical characteristics.

CONCLUSIONS

Firearm injury remains concentrated in the most socioeconomically disadvantaged neighborhoods, and this disparity is increasing over time. Medicaid utilization rose and mortality decreased in this population over time. This research presents a method to inform and monitor local gun violence interventions using ADI to address public health equity.

Using nursing science to advance policy and practice in the context of social and structural determinants of health

BACKGROUND

Social and structural determinants of health play a large role in health inequities.

PURPOSE

To highlight how nursing science can be used to advance policy and practice in the context of social and structural determinants of health.

METHODS

This paper reports on the author's keynote presentation from the 2022 State of The Science Conference on Social and Structural Determinants of Health presented by the Council for the Advancement of Nursing Science. Key concepts are overviewed and defined, followed by examples of two community-engaged research projects with findings that inform practice and policy. The author concludes with individual-, social- and structural-level recommendations as a clarion call for nurses to use research to eliminate health inequities and promote justice for all.

CONCLUSION

What we know is, in part, only as good as what we do with that knowledge. When lives are at stake, gone are the days of knowing something and failing to act on that knowledge.

Identification of Performance Improvement Objectives After Management of a Mass Shooting Incident: A Retrospective Study

Mass shootings are firearm incidents involving four or more victims at one or more locations close to one another. Although some American College of Surgeons designated trauma centers have the experience and resources to adequately treat mass shooting victims who arrive simultaneously or in close proximity to each other, many others do not. Therefore, the objective of this retrospective case series was to evaluate the effectiveness of the treatment of five consecutive gunshot wound victims who presented to a Level II trauma center within 36 minutes of each other. Lessons learned from that experience were used to identify the most effective pre-hospital and hospital management interventions. Opportunities for performance improvement were analyzed with respect to the current literature and the American College of Surgeons 2022 consensus recommendations for mass shootings.

Differential exposure to gun or knife violence over two decades is associated with sibling differences in depression

We tested whether exposure to gun or knife violence over two decades is a cause of depression in young adulthood using data from a nationally representative sample in the United States. The National Longitudinal Study of Adolescent to Adult Health is a sample of 20,745 adolescents, assessed in 1994-95 with follow-ups in 1995-1996 (n = 14,738), 2001-2002 (n = 15,197) and 2007-2008 (n = 15,701; 24 to 32 years old). At each wave, respondents reported exposure to gun or knife violence and symptoms of depression. Regression and sibling fixed effects analyses were conducted to test whether cumulative exposure to gun or knife violence was associated with depression. In fully adjusted models, greater cumulative exposure to gun or knife violence was associated with more symptoms of depression (b = 0.12, 95% C. I. = 0.05; 0.19, p < 0.01) and higher risk for clinically significant depression in young adulthood (OR = 1.07, 95% C. I. = 1.02; 1.13, p < 0.01). Results replicated in sibling fixed effects models (b = 0.21, 95% C. I. = 0.01; 0.42, p < 0.05). These quasi-experimental data suggest that exposure to gun or knife violence is a cause of depression in young adulthood.

Ecological promotive and protective factors deterring gun carriage for young adults living in communities with high rates of community violence

This study identified promotive and protective factors that lessened the likelihood of handgun carriage in a sample of 141 predominantly Black (97%) young adults (ages 18-22) living in high burden communities experiencing elevated rates of violence. Participants completed surveys assessing overall risk and protective factors for violence across ecological contexts (e.g., individual/peer, family, school, and community). A series of regression and moderation analyses were conducted to ascertain direct (promotive) and indirect (protective) relations between factors across the ecological model and likelihood of gun carriage. Results indicated that (1) consistent with previous studies, both witnessing violence and violence victimization were significant risk factors for handgun carriage, (2) ethnic identity was a significant promotive factor related to a lower likelihood of handgun carriage, and (3) lack of family conflict, student status, and community assets were significant protective factors where higher levels of these factors attenuated the relation between exposure to community violence and likelihood of gun carriage. This is one of the first strengths-based studies examining factors that may mitigate the likelihood of gun carriage for young adults in high risk contexts. Our findings suggest that gun violence prevention efforts for high burden communities should support young adults by strengthening factors across the ecological model (e.g., individual, family, school, and community).

Firearm-Related Injuries and Deaths in Children and Youth

Firearms are the leading cause of death in children and youth 0 to 24 years of age in the United States. In 2020, firearms resulted in 10,197 deaths (fatality rate 9.91/100,000 youth 0-24 years old). Firearms are the leading mechanism of death in pediatric suicides and homicides. Increased access to firearms is associated with increased rates of firearm deaths. Substantial disparities in firearm injuries and deaths exist by age, gender, race, ethnicity, and sexual orientation and gender identity and for deaths related to legal intervention. Barriers to firearm access can decrease the risk to youth for firearm suicide, homicide, or unintentional shooting injury and death. Given the high lethality of firearms and the impulsivity associated with suicidal ideation, removing firearms from the home or securely storing them-referred to as lethal means restriction of firearms-is critical, especially for youth at risk for suicide. Primary care-, emergency department-, mental health-, hospital-, and community-based intervention programs can effectively screen and intervene for individuals at risk for harming themselves or others. The delivery of anticipatory guidance coupled with safety equipment provision improves firearm safer storage. Strong state-level firearm legislation is associated with decreased rates of firearm injuries and death. This includes legislation focused on comprehensive firearm licensing strategies and extreme risk protection order laws. A firm commitment to confront this public health crisis with a multipronged approach engaging all stakeholders, including individuals, families, clinicians, health systems, communities, public health advocates, firearm owners and nonowners, and policy makers, is essential to address the worsening firearm crisis facing US youth today.

Violence and the Carceral State: A Public Health Continuum

This Viewpoint reports the disproportionate rate of firearm-related deaths in US Black communities; emphasizes the urgency of addressing this issue; and details the causes of these deaths in the context of community, law enforcement, and in custody.

A Closer Look at the Rising Epidemic of Mass Shootings in the United States and Its Association With Gun Legislation, Laws, and Sales

INTRODUCTION

Mass shootings pose a considerable threat to public safety and significantly cost the United States in terms of lives and expenses. The following are the specific aims of this study: (1) to assess US mass shootings, firearm-related sales, laws, and regional differences from 2015 to 2021 and (2) to investigate changes in mass shootings and firearm sales before and during the Coronavirus Disease 2019 pandemic.

METHODS

A retrospective review was conducted of mass shootings, gun sales, and laws regarding the minimum age required to purchase a firearm within the United States from 2015 to 2021. The 10 states/regions with the greatest mean mass shootings/capita from 2015 to 2021 were selected for further analysis.

RESULTS

Mass shootings correlated significantly with firearm sales from 2015 to 2021 nationwide (P < 0.02 for all). The growth in mass shootings, the number killed/injured, and gun sales were greater in 2020 and 2021 compared to the years prior. The 10 states with the highest mean mass shooting/capita over the study period were Alabama, Arkansas, the District of Columbia, Illinois, Louisiana, Maryland, Mississippi, Missouri, South Carolina, and Tennessee. No significant correlation was found between the number of mass shootings/capita and the minimum age to purchase a firearm.

CONCLUSIONS

Firearm sales correlated significantly with mass shootings from 2015 to 2021. Mass shootings and gun sales increased at greater rates during the Coronavirus Disease 2019 pandemic compared to the years before the pandemic. Mass shootings exhibited inconsistent trends with state gun laws regarding the minimum age to purchase a firearm. Future studies may consider investigating the methods by which firearms used in mass shootings are obtained to further identify targets for prevention.

Exploring the complexity of firearm homicides in Harris County, Texas, from 2009 to 2021: Implications for theory and prevention

Firearm violence is a major health problem in the United States that clusters asymmetrically across geographic and demographic lines, and the persistence and unequal distribution of firearm violence suggests that novel causal explanations and theoretical frameworks may be warranted to guide preventive strategies. Thus, this study explores the following three hypotheses that are grounded in complex systems theory: 1) trends in firearm homicides risks have shifted heterogeneously in Harris County across endemic degree of risk; 2) firearm homicides clusters have remained resilient in Harris County across the study time period; and 3), the associations between known contextual correlates of firearm homicides and the distribution of firearm homicides risks in Harris County have manifested as nonlinear. Using a retrospective study design (n = 4,397) from January 1, 2009-June 31, 2021, medicolegal death investigation data from the Harris County Institute of Forensic Sciences and estimates of community characteristics from the American Community Survey were analyzed using Joinpoint trend analysis, kernel density geospatial analysis, and proportion tests. Trend analyses revealed that firearm homicides risks shifted heterogeneously across endemic degree of risk, with geographical areas with lower initial firearm homicides risks experiencing more profound upward shifts across the time period of the study. Geospatial analyses identified the resiliency of firearm homicides clusters across the study period, particularly in central, southern, and south-western districts of the city. Finally, the relationships between known contextual correlates and the distribution of firearm homicides risks in Harris County appeared to be nonlinear, particularly regarding ethnicity. This study provides data-driven results that suggest the plausibility of complex systems theory in advancing the understanding of causality in firearm homicides. Further, these findings support the urgent need for complex systems-informed preventive efforts that account for spatiotemporal heterogeneity, key interactions that generate nonlinearity, and latent feedback loops that underlie resiliency in firearm homicides.

Firearm-related threat exposure and associated factors among men and women entering a supportive housing substance use disorder recovery program

Background: Exposure to firearm victimization has often been overlooked as a sequela of substance use disorders (SUD).Objectives: The overall objective of this study was to explore firearm-related victimization and associated factors among men and women entering a supportive housing SUD recovery program.Methods: This study used program intake information from men (n = 1,758) and women (n = 1,066) clients entering a SUD recovery program.Results: Results found that almost half (49.3%) of the clients entering the program had ever been threatened with a firearm or held at gunpoint, and one-quarter of those clients had experienced firearm-related threats in the 6 months before entering the program. Economic vulnerability, mental health problems, polysubstance use, interpersonal victimization, and early use of drugs and alcohol were associated with firearm-related threat exposure. Many of the factors associated with firearm-related threat exposure were similar for men and women. Multivariate results found that polysubstance use (OR 1.16 men and 1.13 women), number of adverse childhood events (OR 1.13 men and 1.09 women), and interpersonal victimization (OR 3.41 men and 2.05 women) in the 6 months before program entry were significantly associated with ever being threatened with a firearm. Suicidality (OR 1.53 men and 1.80 women) and interpersonal victimization (OR 6.38 men and 6.08 women) were associated with being threatened with a firearm in the 6 months before program entry for both men and women.Conclusion: Results suggest there is a need for firearm-related risk reduction interventions for individuals in SUD recovery programs.

Understanding the Correlates of Firearm Violence Involvement Among Young Adults Experiencing Homelessness: A 7-City Study

INTRODUCTION

Young adults experiencing homelessness are vulnerable to firearm violence. This study aims to explore the correlates of firearm violence involvement among this vulnerable population, which may inform firearm violence reduction intervention development.

METHODS

Between 2016 and 2017, young adults experiencing homelessness aged 18-26 years (N=1,426) were recruited in 7 U.S. cities. Respondents completed a self-administered computer-assisted anonymous survey regarding their homeless experiences and violence involvement. Separate multivariate logistic regression models were conducted in 2020 to explore the correlates of direct firearm violence victimization, witness of firearm violence, and firearm violence perpetration.

RESULTS

A high proportion of young adults experiencing homelessness were involved in firearm violence (witnessing firearm violence: 40%; direct firearm violence victimization: 28%; perpetration: 18%). Stressful experiences, such as childhood trauma and street victimization, were associated with greater odds of firearm violence involvement. Black (OR=2.4, p<0.001) and Latinx (OR=2.0, p<0.05) young adults had greater odds of experiencing direct firearm violence victimization than White young adults. Black (OR=2.0, p<0.01) and Latinx (OR=2.4, p<0.001) young adults were also at greater risk of witnessing firearm violence. Young adults with mental illness had greater odds of being directly victimized by firearm violence (OR=1.7, p<0.01).

CONCLUSIONS

Given the inter-related nature of firearm violence involvement and given that risk factors for violence are often embedded in social and structural contexts, multipronged community-based approaches to prevent firearm violence among young adults experiencing homelessness are necessary. Targeted efforts may be indicated to attenuate the risk and promote resilience among subgroups of young adults experiencing homelessness who are disproportionately affected by firearm violence.

An Analysis of Patients Dead on Arrival in the American College of Surgeons Trauma Quality Program Participant Use File Data Set

BACKGROUND

Trauma patient care begins on-scene as field triage and mode of transportation are determinants of patient outcomes. This study evaluates the US national patterns of dead on arrival (DOA) among the trauma population.

METHODS

A cross-sectional review of the American College of Surgeons (ACS) Trauma Quality Program Participant Use File (TQP-PUF) data set (2013-2017) was performed. Trauma patients reported as DOA were stratified by ISS into low (<15), intermediate (15-24), or high (≥25) severity. Each group was then subdivided by patient demographics, mechanism, type of injury, and mode of transportation.

RESULTS

Of the 4 336 816 injury cases in the TQP-PUF data set, 33 199 were DOA (.77%). 77.1% (25 604/33 199) of DOAs were male. In the low-ISS group, .36% (13 272/3 639 811) were DOA; in the intermediate-ISS group, 1.2% (4868/421 994) were DOA; and in the high-ISS group, 5.5% (15 059/275 011) were DOA. Motor vehicle collisions (MVCs) (11 262) and firearms (8894) were the most common injury types, equating to 60.7% of DOAs. Falls accounted for 9.1% of all DOAs. The most common DOA age-group was 18-64 years, followed by ≥65 years.

CONCLUSION

DOA trauma patients are predominately adult men suffering fatal blunt force injuries most frequently via MVC. DOAs are caused by all ranges of injury severity. We recommend further development of prevention programs thereby reducing the prevalence of common traumatic injuries, notably MVC, falls, and firearms to improve survival. Future studies should also investigate the access to and distribution of trauma centers and the role of helicopter, ground, and police transport modalities and transport time on and reducing DOAs and improving trauma patient outcomes.