Accuracy of the national violent death reporting system in identifying unintentional firearm deaths to children by children.

BACKGROUND: In assigning manner of death (MOD) for inclusion on death certificates, medical examiners and coroners do not always apply uniform criteria. Previous research indicates surveillance statistics based on death certificates, such as the National Vital Statistics System, grossly miscount unintentional firearm deaths. The National Violent Death Reporting System (NVDRS) has taken steps to reduce variability in manner of death coding by providing uniform criteria for assigning an "abstractor manner of death" (AMD). AMD has five categories: unintentional, suicide, homicide, undetermined, and legal intervention homicide. A previous study found good accuracy of AMD coding for unintentional firearm deaths, all ages, 2003-2006, but a more recent study reported that the NVDRS undercounted self- and other-inflicted unintentional firearm deaths in which both the victim and shooter (for other-inflicted injuries) were under age 15 (2009-2018). FINDINGS: We replicated the recent study's sample population, identifying 924 NVDRS incidents from 2009 to 2018 in which both victim and, for other-inflicted injuries, shooter age was under 15 and AMD was homicide, suicide, unintentional or undetermined (there were no legal intervention deaths to children). We assigned a researcher-adjudicated MOD (RMD) by reviewing incident narratives. RMD was compared with AMD and with manner recorded on the death certificate. Based on RMD as the gold standard, the sensitivity, specificity, and predictive values positive and negative of the AMD for unintentional childhood firearm deaths were, respectively, 90%, 99%, 98% and 96%; 86% (24/28) of false negatives were coded by abstractors as homicides. By contrast, death certificate manner had relatively poor sensitivity (63%). CONCLUSIONS: In our sample of 924 deaths, the abstractor manner of death generally agreed with researcher-adjudicated manner of death, though not perfectly, missing 10% of researcher-adjudicated unintentional deaths, mostly because abstractors coded these unintentional deaths as homicides. A sizable minority of false negatives were unintentional deaths where the narrative explicitly noted that adult negligence contributed to a child's unintentional shooting death. While AMD coding in NVDRS is good, it could be improved if NVDRS coding guidelines explicitly affirmed that potential prosecution for negligent manslaughter is not a contraindication to an AMD of unintentional, provided the firearm was not used to intentionally harm, threaten, or coerce.

Fatal Police Shootings of Victims with Mental Health Crises: A Descriptive Analysis of Data from the 2014-2015 National Violent Death Reporting System.

One in five fatal police shooting victims may have been experiencing a mental health crisis (MHC) at the time of their death [1]. We use data on fatal police shootings from the National Violent Death Reporting System (2014-2015) to (a) identify incidents where the victim is reported to have experienced an MHC at the time of their death, (b) describe the characteristics of these incidents, and (c) compare the characteristics of MHC to fatal police shootings where the victim was not experiencing an MHC at the time of their death. We systematically coded 633 fatal police shootings from 27 states. Descriptive statistics characterized fatal police shootings, including victim characteristics; their mental health status; and contextual information regarding the police encounter (e.g., reason for police call). Overall, 203 of 633 fatal police encounters (32%) involved victims who showed signs of an MHC at the time of their death. Victims were predominantly white, male, and in possession of a firearm. In 3 of 4 cases, the MHC manifested as suicidal ideation despite any relevant documented history among most victims. Among half of suicidal victims, suicidal ideation was expressed verbally and in-person to a family member/intimate partner who subsequently called the police. Dispatch was aware of the MHC in 1 of 4 of total police calls. Overall, fatal police encounters involving those experiencing an MHC accounted for 1 in 3 of our caseloads. Approximately, 3 of 4 mental health calls involved a suicidal person who mainly expressed intent to a loved one in-person.

Suicide by sodium nitrite poisoning: Findings from the National Violent Death Reporting System, 2018-2020.

OBJECTIVES: Suicide by sodium nitrite may be an emerging trend in the United States. Our mixed-methods study aims to: (1) describe the rates of suicides secondary to sodium nitrite self-poisoning in the United States between 2018 and 2020 and (2) characterize the use of sodium nitrite as a suicide method. METHODS: Using NVDRS data, descriptive statistics, population-based incident rates/year and incidence estimates across 50 states were calculated. An inductive thematic analysis characterized the use of sodium nitrite as a suicide method on review of medical examiner and law enforcement reports. RESULTS: 260 incidents were identified as suicides secondary to self-poisoning with sodium nitrite/nitrate across 37 states and 1 territory-69% of which occurred in 2020. The typical victim was a white male student with a known depressive disorder and a history of suicidal thoughts (n = 120). The annual suicide rate using sodium nitrite increased from 0.01-0.09/100,000 person-years over the three-year period. Online forums were used to share knowledge on the procurement and preparation of sodium nitrite poisoning. CONCLUSIONS: Sodium nitrite self-poisoning is an increasingly used planned suicide method among young people. Further studies are required to identify the impact of means safety interventions on the incidence of sodium nitrite self-poisoning incidents.

"Your son needs help and we're gonna help him": A qualitative study of the experiences of gun-owning caregivers of adolescents receiving lethal means counseling in the emergency department.

Suicide attempts in adolescents are often transient and unpredictable, making preventative approaches crucial in reducing suicide deaths. One important approach is lethal means counseling (LMC), in which clinicians counsel caregivers to reduce access to methods used in suicide, specifically firearms and medications. Research on LMC has increasingly encouraged the use of the shared decision-making (SDM) model, which emphasizes information exchange, collaborative deliberation, and joint planning between caregivers and clinicians. We examine caregivers' experiences with LMC, using the SDM model as our analytic framework. We conducted qualitative interviews with 21 firearm-owning caregivers of adolescents who came to emergency departments (EDs) in Colorado for a behavioral health complaint. The implementation of LMC at these institutions had three central components: training for clinicians, materials (e.g., lockboxes and pamphlets) to support LMC, and the protocolization of LMC at the institution. Our semi-structured, hour-long interviews examined participants' reflections on and reactions to LMC provided in the ED and how that related to changes in their understanding of their medication and gun storage practices. We analyzed interviews using a phenomenological approach, focusing on experiences with LMC and informed by the tenets of the SDM model. Our analysis revealed that caregivers were receptive to the idea of LMC in the pediatric emergency care setting. Caregivers' engagement in LMC was reinforced by experiences with clinicians who sought to understand the circumstances of their household, shared the motivation behind LMC, and facilitated conversation around a shared concern for the child's safety. In contrast, counseling delivered mechanically and without considering the household context was tied to caregivers' confusion and alienation, both for LMC and their consideration of changes to home storage practices. These findings provide insight into adolescent caregivers' experiences with LMC implemented in EDs and how LMC may best be approached.

Classifying Firearm Injury Intent in Electronic Hospital Records Using Natural Language Processing.

Importance: International Classification of Diseases-coded hospital discharge data do not accurately reflect whether firearm injuries were caused by assault, unintentional injury, self-harm, legal intervention, or were of undetermined intent. Applying natural language processing (NLP) and machine learning (ML) techniques to electronic health record (EHR) narrative text could be associated with improved accuracy of firearm injury intent data. Objective: To assess the accuracy with which an ML model identified firearm injury intent. Design, Setting, and Participants: A cross-sectional retrospective EHR review was conducted at 3 level I trauma centers, 2 from health care institutions in Boston, Massachusetts, and 1 from Seattle, Washington, between January 1, 2000, and December 31, 2019; data analysis was performed from January 18, 2021, to August 22, 2022. A total of 1915 incident cases of firearm injury in patients presenting to emergency departments at the model development institution and 769 from the external validation institution with a firearm injury code assigned according to International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) or International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Clinical Modification (ICD-10-CM), in discharge data were included. Exposures: Classification of firearm injury intent. Main Outcomes and Measures: Intent classification accuracy by the NLP model was compared with ICD codes assigned by medical record coders in discharge data. The NLP model extracted intent-relevant features from narrative text that were then used by a gradient-boosting classifier to determine the intent of each firearm injury. Classification accuracy was evaluated against intent assigned by the research team. The model was further validated using an external data set. Results: The NLP model was evaluated in 381 patients presenting with firearm injury at the model development site (mean [SD] age, 39.2 [13.0] years; 348 [91.3%] men) and 304 patients at the external development site (mean [SD] age, 31.8 [14.8] years; 263 [86.5%] men). The model proved more accurate than medical record coders in assigning intent to firearm injuries at the model development site (accident F-score, 0.78 vs 0.40; assault F-score, 0.90 vs 0.78). The model maintained this improvement on an external validation set from a second institution (accident F-score, 0.64 vs 0.58; assault F-score, 0.88 vs 0.81). While the model showed some degradation between institutions, retraining the model using data from the second institution further improved performance on that site's records (accident F-score, 0.75; assault F-score, 0.92). Conclusions and Relevance: The findings of this study suggest that NLP ML can be used to improve the accuracy of firearm injury intent classification compared with ICD-coded discharge data, particularly for cases of accident and assault intents (the most prevalent and commonly misclassified intent types). Future research could refine this model using larger and more diverse data sets.

Engaging stakeholders to develop a suicide prevention learning module for Louisiana firearm training courses.

BACKGROUND: Firearm suicide is a significant public health problem in the United States of America among the general and veteran populations. Broad-based preventive strategies, including lethal means safety, have been emphasized as a key approach to suicide prevention. Prior research has identified ways to improve the reach and uptake of lethal means safety messages. However, few resources have been created with these lessons in mind. METHODS: Louisiana firearm owners and instructors were recruited through a larger project, Veteran-Informed Safety Intervention and Outreach Network, as well as a publicly available database of firearm instructors to participate in focus groups to provide feedback on an existing suicide prevention learning module (developed in Utah) for use by firearm instructors. Their feedback was used to adapt the module, which included a brief video and PowerPoint presentation. Firearm owners and instructors were then invited back for another round of focus groups to provide feedback on this adapted learning module. Team-based rapid qualitative analysis was conducted to identify themes across transcripts from these four focus groups. RESULTS: Firearm owners and instructors agreed on several key themes, including the importance of messenger relatability and aligning the lethal means safety message with firearm owner values. Feedback suggested these themes were adequately addressed in the adapted learning module and contributed to overall module acceptability. The final theme, present across the original and adapted learning modules (i.e., Utah and Louisiana), was openness to further information and training on firearm suicide prevention. CONCLUSION: Consistent with a public health approach to suicide prevention, the current study used stakeholder engagement to develop a suicide prevention learning module perceived as representative, accurate, and acceptable to Louisiana firearm owners and instructors. These findings can be used to inform firearm suicide prevention efforts in other states.

Identifying Occupation Groups for Suicide Prevention: A Statewide Data Linkage Study.

OBJECTIVE: To identify suicide rates by occupation category in Utah and describe the hospital history and circumstances of suicide decedents in the occupation category that had the state's highest rate and highest number of suicides: Construction and Extraction. METHOD: We used data on suicide decedents from the National Violent Death Reporting System (NVDRS) for 2005-2015 (n = 4,590) to calculate sex- and occupation-specific suicide rates among adults 18-65 years old in Utah. For working-age men who died by suicide during the years 2014-2015 (n = 623), we linked NVDRS data with decedents' hospital histories. RESULTS: One in five working-age men who took their life in Utah worked in Construction and Extraction, the single Bureau of Labor Statistics occupation category with both the highest number (n = 719) and rate of suicides (86.4/100,000 men vs. a range of 15.3-66.2 for other occupations). For females, there was no occupation group that had both high rates of suicide and high numbers of suicides compared with other occupations, so there was no clear occupation group to focus on in the same way there was for men. Using linked data for 2014-2015 deaths, 58% of men in Construction and Extraction who died by suicide had been diagnosed in the hospital in the past three years with a substance abuse or mental health problem, and a quarter (25%) tested positive for opioids on post-mortem examination. Nearly half (48%) of 2014-2015 male suicide decedents in Construction and Extraction were reported to have intimate partner problems, about a quarter (26%) had a criminal problem, a quarter (25%) were unemployed, and over half (54%) died by gunshot. CONCLUSIONS: Linked data identified Construction and Extraction as a potentially high-impact occupation group for suicide prevention and suggested potential contexts for intervention.HIGHLIGHTSConstruction and Extraction stands out as an occupation group with a very high number and rate of suicides.Two-thirds of male decedents in Construction and Extraction had a substance abuse problem.For Utah females, there were no occupations with both high rates and high numbers of suicides.

Selection and Use of Firearm and Medication Locking Devices in a Lethal Means Counseling Intervention.

Background: While some suicide prevention initiatives distribute locking devices for firearms and medication, little evidence exists to guide the selection of devices. Aims: This study aimed to describe safety standards for locking devices and compare parental acceptance rates for different types of devices. Method: As part of the larger SAFETY Study, behavioral health clinicians provided free locking devices to parents whose child was evaluated in the emergency department (ED) for a suicide-related or behavioral health-related problem. For logistical reasons, we changed the specific devices offered midstudy. Data on device use came from follow-up interviews with 226 parents. Results: Few effective standards exist for locking devices for home use; we could easily break into some. At follow-up, twice as many gun-owning parents were using ED-provided handgun lockboxes as cable locks (28% vs. 14%, p = .02). Overall, 55% of parents reported using an ED-provided medication lockbox, with more using the drawer-sized lockbox than the larger, steel toolbox (60% vs. 42%, p < .01). Limitations: Storage outcomes are from parents' self-report and from one state only. Conclusion: Parents appeared to prefer some devices over others. Our findings suggest the need for (a) effective safety standards, (b) affordable devices meeting these standards, and (c) further research on consumer preferences to ensure use.

Assessment of the Accuracy of Firearm Injury Intent Coding at 3 US Hospitals.

Importance: The absence of reliable hospital discharge data regarding the intent of firearm injuries (ie, whether caused by assault, accident, self-harm, legal intervention, or an act of unknown intent) has been characterized as a glaring gap in the US firearms data infrastructure. Objective: To use incident-level information to assess the accuracy of intent coding in hospital data used for firearm injury surveillance. Design, Setting, and Participants: This cross-sectional retrospective medical review study was conducted using case-level data from 3 level I US trauma centers (for 2008-2019) for patients presenting to the emergency department with an incident firearm injury of any severity. Exposures: Classification of firearm injury intent. Main Outcomes and Measures: Researchers reviewed electronic health records for all firearm injuries and compared intent adjudicated by team members (the gold standard) with International Classification of Diseases, Ninth and Tenth Revision, Clinical Modification (ICD-9-CM and ICD-10-CM) codes for firearm injury intent assigned by medical records coders (in discharge data) and by trauma registrars. Accuracy was assessed using intent-specific sensitivity and positive predictive value (PPV). Results: Of the 1227 cases of firearm injury incidents seen during the ICD-10-CM study period (October 1, 2015, to December 31, 2019), the majority of patients (1090 [88.8%]) were male and 547 (44.6%) were White. The research team adjudicated 837 (68.2%) to be assaults. Of these assault incidents, 234 (28.0%) were ICD coded as unintentional injuries in hospital discharge data. These miscoded patient cases largely accounted for why discharge data had low sensitivity for assaults (66.3%) and low PPV for unintentional injuries (34.3%). Misclassification was substantial even for patient cases described explicitly as assaults in clinical notes (sensitivity of 74.3%), as well as in the ICD-9-CM study period (sensitivity of 77.0% for assaults and PPV of 38.0% for unintentional firearm injuries). By contrast, intent coded by trauma registrars differed minimally from researcher-adjudicated intent (eg, sensitivity for assault of 96.0% and PPV for unintentional firearm injury of 93.0%). Conclusions and Relevance: The findings of this cross-sectional study underscore questions raised by prior work using aggregate count data regarding the accuracy of ICD-coded discharge data as a source of firearm injury intent. Based on our observations, researchers and policy makers should be aware that databases drawn from hospital discharge data (most notably, the Nationwide Emergency Department Sample) cannot be used to reliably count or characterize intent-specific firearm injuries.

The emerging infrastructure of US firearms injury data.

For every fatal shooting in the United States, detailed information from reports of coroners or medical examiners, police departments, and other sources is recorded in the National Violent Death Reporting System. There is no such system in place for nonfatal shootings, which far outnumber fatalities. Hospital data systems are in place that could, with some improvements, provide access to reliable local, state and national estimates of firearm injuries. Such estimates are possible because most firearms injuries are treated in hospitals, and hospitals routinely assign "external cause of injury" codes to all injury encounters. Federal health agencies supervise a number of data systems that centralize hospital data. Challenges currently being addressed are public access, timeliness, and accuracy of coding of intent. (Hospitals misclassify many firearm assaults as accidents.) Law enforcement agencies provide detailed data on shootings in criminal circumstances, including shootings that are not treated in a hospital. The FBI's Uniform Crime Reports (UCR) system aggregates data from agencies. The FBI instituted a radical reform of this system beginning in 2021, resulting in a sharp agency participation drop that prevents valid national estimates. The reform requires agencies to report incident-level data instead of summary counts, which is all that was required for the previous 90 years. There are ongoing efforts to increase participation in the new system and restore its former status as the leading source of national crime estimates. In the meantime, data on nonfatal gunshot cases are available from a number of police departments. We discuss additional reforms needed to generate timely, accurate, publicly accessible data from hospitals and police.

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.

Hospital visit histories of suicide decedents: a study in Utah.

The study aims to describe the 3-year hospital visit histories of suicide decedents in Utah grouped by the suicide method they used. Hospital visit histories from the Utah Office of Health Care Statistics were linked to a census of suicide mortality data from the National Violent Death Reporting System in 2014 and 2015. Overall, 14% of suicide decedents had visited a hospital for deliberate self-harm (DSH) and 49% for a behavioural health issue (BHI), including DSH, suicidal ideation, mental health and substance abuse, prior to their death. Firearms suicide decedents made up over half of all suicides but were the least likely to have a history of DSH or BHI prior to their death (8% and 41%, respectively). Few suicide decedents visited a hospital for DSH prior to their death, although half had visits for BHI. Hospital-based interventions that aim to prevent suicide should not be limited to visits for DSH.

Consensus-Driven Priorities for Firearm Injury Education Among Medical Professionals.

PURPOSE: Firearm injury is a leading cause of morbidity and mortality in the United States. However, many medical professionals currently receive minimal or no education on firearm injury or its prevention. The authors sought to convene a diverse group of national experts in firearm injury epidemiology, injury prevention, and medical education to develop consensus on priorities to inform the creation of learning objectives and curricula for firearm injury education for medical professionals. METHOD: In 2019, the authors convened an advisory group that was geographically, demographically, and professionally diverse, composed of 33 clinicians, researchers, and educators from across the United States. They used the nominal group technique to achieve consensus on priorities for health professions education on firearm injury. The process involved an initial idea-generating phase, followed by a round-robin sharing of ideas and further idea generation, facilitated discussion and clarification, and the ranking of ideas to generate a prioritized list. RESULTS: This report provides the first national consensus guidelines on firearm injury education for medical professionals. These priorities include a set of crosscutting, basic, and advanced learning objectives applicable to all contexts of firearm injury and all medical disciplines, specialties, and levels of training. They focus on 7 contextual categories that had previously been identified in the literature: 1 category of general priorities applicable to all contexts and 6 categories of specific contexts, including intimate partner violence, mass violence, officer-involved shootings, peer (nonpartner) violence, suicide, and unintentional injury. CONCLUSIONS: Robust, data- and consensus-driven priorities for health professions education on firearm injury create a pathway to clinician competence and self-efficacy. With an improved foundation for curriculum development and educational program-building, clinicians will be better informed to engage in a host of firearm injury prevention initiatives both at the bedside and in their communities.

A cohort study of initial self-harm events: method-specific case fatality of index events, predictors of fatal and nonfatal repetition, and frequency of method-switching.

Most studies evaluating self-harm repetition risk factors are from Asia and Europe, use cohorts of people who self-injure without differentiating incident and prevalent self-harm episodes, and do not stratify by suicide method. The current study uses an incident user design to (a) examine case fatality at index self-harm events and at each repeat event, by method, (b) describe method-switching, and (c) identify factors associated with repetition of self-harm among those who survive their index hospitalization. Specifically, this study reports psychiatric history and method-specific case fatality for the initial self-harm event among Utah residents with an index event in 2014 or 2015 and who have no history of prior self-harm in hospital records. For survivors of the index self-harm episode, we use Accelerated Failure Time models to identify risk factors for nonfatal repetition and separately for suicide. Key findings: 10,521 Utah residents with no 3-year self-harm hospital history experienced a 2014 or 2015 index event. Of the 9.5% with index deaths, 53.6% used firearms. Of the 90.5% who survived, 63.1% used drugs. Among the index nonfatal cases, over an average 1-year follow-up, 11.7% experienced a nonfatal repetition and 0.8% died by suicide. Most subsequent nonfatal repetitions (59.7%) and suicides (56.8%) had presented with an index drug poisoning; over half (56.8%) of those who died switched methods. For those who subsequently fatally self-harmed, most used poisoning by drugs (33.8%), hanging/strangulation (28.4%), or firearms (24.3%) in the terminal episode. Nonfatal repetition was associated with younger age, index cutting/piercing instruments, and past-year psychiatric and drug abuse diagnoses. Subsequent suicide was associated with male gender, older age, and index gas poisoning and hanging/suffocation. Of the 56 people who survived an index firearm event, none subsequently died by suicide during the study period.

Suicides at Shooting Ranges.

Background: Some shooting ranges have adopted policies to prevent suicides at their facilities. Little data have been available to guide them. Aim: We aimed to describe the incidence and characteristics of suicides at public shooting ranges. Method: We conducted text searches of 63,710 firearm suicides in the 16 states participating in the National Violent Death Reporting System from 2004 to 2015 to identify those occurring at public shooting ranges. Results: A total of 118 (or 0.18%) occurred at a shooting range, or 0.12 per million population. If that rate held for the nation as a whole, there would have been roughly 35 shooting range suicides per year during the study period. In total, 88% of decedents arrived alone. When gun ownership was noted, 86% of guns were rented from the range. In some cases, people drove to the range and took their lives in the parking lot with their own gun. Limitations: Our search strategy may have missed cases, and the data may not be nationally representative. Conclusion: Suicides at shooting ranges are rare. Policies that some ranges have adopted - such as allowing rentals only if the person is not alone - are responsive to the actual characteristics of these deaths and could potentially prevent most.

Changes in Firearm and Medication Storage Practices in Homes of Youths at Risk for Suicide: Results of the SAFETY Study, a Clustered, Emergency Department-Based, Multisite, Stepped-Wedge Trial.

STUDY OBJECTIVE: We evaluate whether a counseling intervention implemented at the hospital level resulted in safer firearm and medication storage by caregivers of youths aged 10 to 17 years after their child's evaluation in the emergency department (ED) for a behavioral health concern. METHODS: We used a stepped-wedge clustered design rolled out at 4 hospital sites to assess primary preregistered outcomes (self-reported storage changes caregivers made to household firearms and medications), assessed by survey 2 weeks after the ED visit. Three logistic models provided estimates of the intervention effect: an unadjusted model, a model with hospital-level fixed effects, and a model that further adjusts for time. RESULTS: Of the 575 caregiver participants, 208 were firearm owners (123 in usual care, 85 in the intervention). Baseline (pre-ED visit) characteristics did not differ between usual care and intervention phases. During the 2-year study period, twice as many caregivers whose child visited the ED after (compared with before) a hospital adopted the intervention improved firearm storage and 3 times as many improved medication storage (odds ratio [OR]=2.1 [95% confidence interval {CI} 1.0 to ∞] and OR=3.0 [95% CI 2.2 to ∞], respectively). After adjusting for time, the intervention effect for medications persisted (OR=2.0 [95% CI 1.0 to ∞]); the effect on firearms did not (OR=0.7 [95% CI 0.1 to ∞]). CONCLUSION: To our knowledge, this study is the first controlled trial to estimate the effectiveness of an intervention on firearm and medication storage in homes of youths at elevated risk of suicide. We found evidence that caregivers' medication storage improved after their child's ED visit, with evidence suggestive of improvement for firearm storage.

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.