Firearm-Related Lead Exposure and Child Lead Levels in the United States, 2012-2018.

OBJECTIVE: To determine if firearm ownership is positively related to elevated child lead levels at a state-level, even when accounting for other sources of lead. STUDY DESIGN: For this cross-sectional ecological study, we investigated whether household firearm ownership rates (a proxy for firearm-related lead exposure) was associated with the prevalence of elevated child blood lead levels in 44 US States between 2012 and 2018. To account for potential confounding, we adjusted for other known lead exposures, poverty rate, population density, race, and calendar year. To address missing data, we used multiple imputation by chained equations. RESULTS: Prevalence of elevated child blood lead positively correlated with household firearm ownership and established predictors of lead exposure. In fully adjusted negative binomial regression models, child blood lead was positively associated with household firearm ownership and older housing; each IQR (14%) increase in household firearm ownership rate was associated with a 41% higher prevalence of childhood elevated blood lead (prevalence ratio: 1.41, 95% CI: 1.11-1.79). CONCLUSION: These data provide state-level evidence that firearms may be an important source of child lead exposure. More research is needed to substantiate this relationship and identify modifiable pathways of exposure at the individual level.

Firearm licensure, lead levels and suicides in Massachusetts.

Nationally, between 2011 and 2019, suicide was the second leading cause of injury death, and about half of all suicides were firearm related. An overlooked factor connecting firearms and suicide is lead exposure. Lead bullets and primers are used throughout the US and pose danger to adults and children. Most (not all) studies link lead to mental illness, while others link lead with suicide. Research has linked lead and firearm violence, but rarely examined the relationship among firearms, lead exposure, and suicide. We collected data for cities/towns in Massachusetts between 2011 and 2019 regarding the number of firearm licenses, suicides, prevalence of blood lead levels, and covariates. We hypothesized that; 1) towns with higher levels of licensure will have higher levels of firearm suicides but licensure will have little relationship with non-firearm suicide; 2) towns with higher levels of licensures would have higher rates of lead exposure; 3) higher lead levels would be associated with higher rates of suicide by all methods. Individuals living in towns with higher rates of licensure were significantly more likely to die in firearm suicides and all suicide types. They were not more or less likely to die from non-firearm suicides. Lead was a predictor of all suicide types. Our study appears to be the first to show the established firearm suicide relationships holds within municipalities in a single state. We provide evidence concerning the link between lead exposure and suicide, particularly from firearms, and provide a glimpse into the relationship between firearm prevalence and elevated blood lead levels.

Patterns of household gun ownership and firearm suicide among black men compared to white men.

Little is known about the patterns of household gun ownership among Black Americans, so little is known about the relationship between the patterns of Black household gun ownership and the patterns of Black firearm suicide. We analyze data from the 2001-2004 Behavioral Risk Factor Surveillance System, the first and last years for which a gun question was part of the core questions. We compare household gun ownership patterns for Black men compared to White men across geographic (region, urbanicity), demographic (age, education, married, children at home), and health-related characteristics (binge drinking, smoking), and find that the patterns are quite similar for all eight variables. However, when we compare these race-specific patterns to the race-specific firearm suicide patterns for 2001-2004, while the White firearm suicide patterns follow their gun ownership patterns, the Black patterns do not. While gun ownership increases with age, adult male Black firearm suicide rates are highest in the younger age group-an age group that also has a high proportion of suicides that are firearm suicides. Differences in unadjusted demographic patterns in firearm suicide between Black men and White men cannot be explained by differences in the self-reported patterns of household gun ownership.

Patterns of household gun ownership and firearm suicide among black men compared to white men.

Little is known about the patterns of household gun ownership among Black Americans, so little is known about the relationship between the patterns of Black household gun ownership and the patterns of Black firearm suicide. We analyze data from the 2001-2004 Behavioral Risk Factor Surveillance System, the first and last years for which a gun question was part of the core questions. We compare household gun ownership patterns for Black men compared to White men across geographic (region, urbanicity), demographic (age, education, married, children at home), and health-related characteristics (binge drinking, smoking), and find that the patterns are quite similar for all eight variables. However, when we compare these race-specific patterns to the race-specific firearm suicide patterns for 2001-2004, while the White firearm suicide patterns follow their gun ownership patterns, the Black patterns do not. While gun ownership increases with age, adult male Black firearm suicide rates are highest in the younger age group-an age group that also has a high proportion of suicides that are firearm suicides. Differences in unadjusted demographic patterns in firearm suicide between Black men and White men cannot be explained by differences in the self-reported patterns of household gun ownership.

Who owned the gun in firearm suicides of men, women, and youth in five US states?

One way to reduce firearm suicide is to keep household guns away from a person at risk for suicide. To learn who owned (and presumably controlled access to) the guns used in suicide and which broad gun type they were, we examined National Violent Death Reporting System (NVDRS) data from 2015 to 2017 for five US states that supplied information on gun owner in over 80% of firearm suicides (AK, IA, NH, UT, WI). For adult males, 88% used their own gun; for women, 52% used their own gun and 32% used their partner's gun; for youth ages 18-20, 42% used their own gun, 43% used a family member's, and 8% used a friend's; for children, 19% used their own gun (usually a long gun) and 79% used a family member's gun. Almost 3/4 of firearm suicides involved a handgun, ranging from 62% for youth to 92% for women. In times of suicide risk, interventions for a youth should address not only the parents' guns, but those of other family members and the youth's own rifle or shotgun. For a woman, interventions need to address her own and her partner's guns. For a man, locking guns alone will confer little protection if he controls the keys or combination. Storing firearms-or a critical component-away from home or having someone else control the locks may be safer. Five NVDRS states provided useful data on who owned the gun used in firearm suicides. More NVDRS states should follow suit.

Lesson from the continuing 21st century motor vehicle success.

In 1999, the Centers for Disease Control and Prevention proclaimed the reduction in motor vehicle fatalities to be one of the great public health achievements of the 20th century. That motor vehicle success story has had enormous intellectual impact on the injury prevention field, providing many guiding lessons. Can we learn any lessons from what has happened to motor vehicle safety in the 21st century? A key lesson may come from the fact that the great injury achievement of reducing the motor vehicle death rate did not stop in 2000-it continued. We believe that is largely due to the 20th century creation of the conditions that promote continuous declines in injury. By contrast, in the firearms area, these conditions do not exist, and rates of death have not fallen, but have increased. As the idea of continuous quality improvement has become a staple in medicine, we should similarly have a focus on how to continuously reduce injuries. An important lesson from the 21st century motor vehicle success story for the injury prevention field is that we should put more strategic emphasis on creating the conditions that will lead to continuous reductions in injuries. But first we need a much better understanding of what those conditions are.

Emotional and physical symptoms after gun victimization in the United States, 2009-2019.

Interpersonal firearm violence is a major public health problem in the United States. The objective of this study was to determine the effects of gun victimization on the likelihood of post emotional and physical symptoms as reported by victims. We focused on non-fatal violent crimes reported to the National Crime Victimization Surveys for 2009-2019 and ran a set of binary logistic regressions. For outcome measures, we used two dichotomous variables, whether the victim reported feeling at least one of the seven emotional symptoms included in the survey (i.e., anxious, angry, sad/depressed, vulnerable, violated, distrustful, unsafe) and whether they reported having at least one of the seven physical symptoms (i.e., headaches, sleep eating/drinking disorders, upset stomach, fatigue, high blood pressure, muscle tension). Our key independent variable was the type of weapons used by the offender: guns, other weapons, and no weapon. We controlled for demographics of the victim, as well as other aspects of the crime (e.g., age, race, sex of victim, multiple offenders, type of violent crime). Victims of crimes in which the offender used a gun were most likely to report both emotional and physical symptoms, followed by victims of crimes in which the offender used other weapons, and lastly by victims of unarmed offenders. Our findings suggest that the presence of a firearm during a violent crime results in an increased likelihood of subsequent emotional and physical repercussions.

Fatal police shootings of civilians, by rurality.

In the United States, firearm homicides disproportionately occur in urban areas. We examine whether the same is true for fatal police shootings. We use data on fatal police shootings from Washington Post's "Fatal Force Database" (2015-2017). Using Census population estimates, we examine rates of fatal police shootings, stratified by race/ethnicity (White, Black, Hispanic), across urban and rural areas using five different classification schemes. Two classification schemes-from the National Center for Health Statistics and the US Department of Agriculture-use counties as the basic unit. Three classification schemes-from the National Center for Education Statistics, the US Census Bureau, and the website "FiveThirtyEight" use zip codes. There were just under 1000 fatal police shootings per year from 2015 to 2017, a rate of 0.31 per 100,000 population. Black victimization rates were more than twice those for Whites, with Hispanic victimization rates in between. Across all classification schemes there was little difference in rates of fatal police shootings between urban and rural areas, with suburbs having somewhat lower rates. Among Whites, rates of fatal police shooting victimization were higher in rural areas compared to urban areas, while among Blacks the rates were higher in more urban areas. Our results suggest that efforts to reduce police shootings of civilians should include rural and suburban as well as urban areas.

A Typology of Civilians Shot and Killed by US Police: a Latent Class Analysis of Firearm Legal Intervention Homicide in the 2014-2015 National Violent Death Reporting System.

Approximately 1000 people are killed by police acting in the line of duty each year. Historically, research on these deaths, known as legal intervention homicides (LIH), has been limited by data that is either contextually rich but narrow in scope and not readily available to the public (e.g., police department reports from a single city), or detail-poor but geographically broad, large, and readily available (and maintained by federal agencies) (e.g., vital statistics and supplemental homicide reports). Over the past 5 years, however, researchers have turned to the National Violent Death Reporting System (NVDRS), which captures nearly all lethal police shootings in participating states while providing detailed incident and victim information. The current study extends prior work on police-involved lethal shootings in three important ways. First, we use latent class analysis to construct a data-driven, exhaustive, mutually exclusive typology of these events, using NVDRS data 2014-2015. Second, rather than fitting some, but not all cases into predefined sub-types, every case is assigned membership to a particular emergent class. Third, we use a validated case identification process in NVDRS to identify incidents of lethal police-involved shootings. Seven classes emerge. Classes differ across important incident and victim characteristics such as the event that brought the victim and law enforcement together, the highest level of force used by the victim against law enforcement, and the kind of weapon, if any, used by the victim during the incident. Demographic variables do not distribute uniformly across classes (e.g., the latent class in which the victim appeared to pose minimal threat to law enforcement was the only class in which the plurality of victims was a non-white race). Our approach to generating these typologies illustrates how data-driven techniques can complement subjective classification schemes and lay the groundwork for analogous analyses using police encounter data that include fatal and non-fatal outcomes.

Let's make it a priority to improve injury data.

While injury researchers often complain about the lack of quality data, we don't do nearly enough to create and improve data systems.

The Impact of State Firearm Laws on Homicide and Suicide Deaths in the USA, 1991-2016: a Panel Study.

BACKGROUND: Firearm injuries are a major cause of mortality in the USA. Few recent studies have simultaneously examined the impact of multiple state gun laws to determine their independent association with homicide and suicide rates. OBJECTIVE: To examine the relationship between state firearm laws and overall homicide and suicide rates at the state level across all 50 states over a 26-year period. DESIGN: Using a panel design, we analyzed the relationship between 10 state firearm laws and total, age-adjusted homicide and suicide rates from 1991 to 2016 in a difference-in-differences, fixed effects, multivariable regression model. There were 1222 observations for homicide analyses and 1300 observations for suicide analyses. PARTICIPANTS: Populations of all US states. MAIN MEASURES: The outcome measures were the annual age-adjusted rates of homicide and suicide in each state during the period 1991-2016. We controlled for a wide range of state-level factors. KEY RESULTS: Universal background checks were associated with a 14.9% (95% CI, 5.2-23.6%) reduction in overall homicide rates, violent misdemeanor laws were associated with a 18.1% (95% CI, 8.1-27.1%) reduction in homicide, and "shall issue" laws were associated with a 9.0% (95% CI, 1.1-17.4%) increase in homicide. These laws were significantly associated only with firearm-related homicide rates, not non-firearm-related homicide rates. None of the other laws examined were consistently related to overall homicide or suicide rates. CONCLUSIONS: We found a relationship between the enactment of two types of state firearm laws and reductions in homicide over time. However, further research is necessary to determine whether these associations are causal ones.

The Effect of Large-Capacity Magazine Bans on High-Fatality Mass Shootings, 1990-2017.

Objectives. To evaluate the effect of large-capacity magazine (LCM) bans on the frequency and lethality of high-fatality mass shootings in the United States.Methods. We analyzed state panel data of high-fatality mass shootings from 1990 to 2017. We first assessed the relationship between LCM bans overall, and then federal and state bans separately, on (1) the occurrence of high-fatality mass shootings (logit regression) and (2) the deaths resulting from such incidents (negative binomial analysis). We controlled for 10 independent variables, used state fixed effects with a continuous variable for year, and accounted for clustering.Results. Between 1990 and 2017, there were 69 high-fatality mass shootings. Attacks involving LCMs resulted in a 62% higher mean average death toll. The incidence of high-fatality mass shootings in non-LCM ban states was more than double the rate in LCM ban states; the annual number of deaths was more than 3 times higher. In multivariate analyses, states without an LCM ban experienced significantly more high-fatality mass shootings and a higher death rate from such incidents.Conclusions. LCM bans appear to reduce both the incidence of, and number of people killed in, high-fatality mass shootings.

Comparing gun-owning vs non-owning households in terms of firearm and non-firearm suicide and suicide attempts.

The goal of this study is to provide, for the United States, estimates for gun-owning and non-owning households in terms of firearm and non-firearm suicides and suicide attempts. To make these ballpark estimates I combine a half-dozen known "facts" about suicide (e.g., households with firearms are at approximately 3× the risk of suicide as households without firearms). Among the six major conclusions are that about 90% of firearm suicides occur among members of gun-owning households, that 75% of suicides among gun-owning families are firearm suicides, but only 20% of suicide attempts among these families are with firearms. This study not only provides estimates of suicides and suicide attempts by gun-owning and non-owning households, but the reasonableness of the estimates provides support for the reasonableness of the half-dozen known "facts" about firearms and suicide.

Violent death rates in the US compared to those of the other high-income countries, 2015.

Violence is a serious public health issue in the U.S. This research compares the US and other high-income countries in terms of violent death. We used data from the World Health Organization for populous, high-income countries. Data from CDC's WISQARS and WONDER systems were used to assess mortality data among US white and non-white populations and in low-, medium-, and high-gun states in 2015. Death rates per 100,000 populations were calculated overall, by age, and by sex. Poisson and negative binomial regression were used to test for significance. The homicide rate in the US was 7.5 times higher than the homicide rate in the other high-income countries combined, which was largely attributable to a firearm homicide rate that was 24.9 times higher. The overall firearm death rate was 11.4 times higher in the US than in other high-income countries. In this dataset, 83.7% of all firearm deaths, 91.6% of women killed by guns, and 96.7% of all children aged 0-4 years killed by guns were from the US. Firearm homicide rates were 36 times higher in high-gun US states and 13.5 times higher in low-gun US states than the firearm homicide rate in other high-income countries combined. The firearm homicide rate among the US white population was 12 times higher than the firearm homicide rate in other high-income countries. The US firearm death rate increased between 2003 and 2015 and decreased in other high-income countries. The US continues to be an outlier among high-income countries with respect to firearm deaths.

Variation in Rates of Fatal Police Shootings across US States: the Role of Firearm Availability.

The USA has very high rates of homicide by police compared to other high-income countries, with approximately 1000 civilians killed annually. The overwhelming majority of these police homicides are fatal shootings. Over the past 5 years, several comprehensive, real-time, data repositories, drawn largely from news reporting, have kept track of incidents in which civilians die during an encounter with the police and have become widely available. Data from these repositories, which are more complete than data available from federal data systems, have been used to explore fatal police shootings of civilians, often with a focus on racial disparities in police shootings of unarmed civilians, and have consistently found that police are more likely to shoot unarmed African American men than unarmed White men. Although numerous studies have examined how rates of police killings of civilians are related to several ecologic determinants of these events, no peer-reviewed study to date has examined the extent to which variation in police involved firearm homicides is explained by firearm prevalence while adjusting for violent crime rates (the most well-established ecologic factor associated with fatal police shootings). The current cross-sectional state-level analysis uses data on the number of civilians shot and killed by police in the line of duty, aggregated over 2015-2017. Data come from the Washington Post's "Fatal Force Database", which assembles the information from news reports and other sources. Data provided include information on whether the victim was armed, and, if so, with what weapon. Explanatory ecologic variables in our models include the violent crime rate, the percentage of the state population that is non-White, poverty rate, and urbanization, along with a validated proxy for firearm prevalence. We find that rates of police shooting deaths are significantly and positively correlated with levels of household gun ownership, even after accounting for the other explanatory variables. The association is stronger for the shooting of armed (with a gun) rather than unarmed victims.

Injury prevention class exercise: three-pronged list making.

It is difficult to find classroom exercises that have been specifically designed for injury prevention students. The suggested list-making classroom exercise forces students to recognise and devise many policy and programmatic options over and above the ones that normally spring to mind. Most important, it helps give students a better understanding of what is meant by, and the potential usefulness of, the public health approach to injury prevention.