Reference: Kemal et al. Emergency department utilization by youth before and after firearm injury. AEM July 2025 Date: July 28, 2025 Guest Skeptic: Dr. Kirsty Challen is a Consultant in Emergency Medicine in the UK and an evidence-based medicine advocate. She's a seasoned knowledge translator with her wonderful PaperinaPic infographics. Case: Your non-US emergency department (ED) has recently been shaken by the attendance of a teenager with a gunshot injury. Subsequent investigation has found he attended a different hospital in the region six weeks ago with a stab wound. The team wonders if that attendance was an opportunity to intervene. Background: Firearm injuries are now the leading cause of death in youth in the United States, surpassing motor vehicle collisions.[1] While the immediate clinical management of gunshot wounds is well covered in emergency medicine training, there is less clarity around what happens before and after that ED visit. Could we identify these high-risk youth earlier? Do patterns of ED use provide clues for intervention? The ED often serves as the primary healthcare contact point for youth exposed to community violence. Some youth injured by firearms may have prior ED visits for mental health crises or minor injuries, presenting opportunities for preventative strategies. But are we missing these cues? Additionally, once youth survive a firearm injury, they face elevated risk for repeat injury, psychological trauma, and even death. Understanding post-injury healthcare utilization may reveal missed chances for intervention, particularly in general EDs that may lack pediatric-specific resources. Clinical Question: Do youth with firearm injuries have increased emergency department utilization before and after their injury compared to their peers? Reference: Kemal et al. Emergency department utilization by youth before and after firearm injury. AEM July 2025 Population: Youth aged 10 to 19 years who had an index ED visit for a firearm injury in 2019 across eight US states, identified from the Healthcare Cost and Utilization Project database. Exclusion: Youth who lacked the data to assess 90 days before or after the index injury, and those without longitudinal ED visit linkage, injuries from non-power firearms, and recurrent visits with firearm injury. Exposure: Having sustained a firearm injury as indexed by an ED visit. Comparison: ED utilization by the same patients in the 90 days before and after the firearm injury. Outcomes: Primary Outcome: Number and types of ED visits 90 days before and after the index firearm injury. Secondary Outcomes: Types of ED visits and recurrence of trauma. Type of Study: Retrospective cohort study using linked administrative claims data. Dr. Samaa Kemal This is an SGEMHOP, and we are pleased to have the lead author on the episode. Dr. Samaa Kemal is an early-career pediatric emergency medicine clinician-investigator at Ann & Robert H. Lurie Children's Hospital of Chicago. Her work is primarily focused on the intersection of violence and health equity in children. Her research priorities are focused on developing and implementing novel and effective solutions to prevent violent injuries and subsequent adverse outcomes in children. Authors’ Conclusions: “Youth have high rates of ED utilization before and after firearm injury. Half of firearm-injured youth receive their emergency care exclusively in general EDs. Implementing firearm injury prevention and intervention efforts in all ED settings is critical.” Quality Checklist for Observational Study: Did the study address a clearly focused issue? Yes Did the authors use an appropriate method to answer their question? Yes Was the cohort recruited in an acceptable way? Yes Was the exposure accurately measured to minimize bias? Yes Was the outcome accurately measured to minimize bias? Yes Have the authors identified all important confounding factors? No Was the follow-up of subjects complete enough? Yes How precise are the results? Fairly precise Do you believe the results? Yes Can the results be applied to the local population? No Do the results of this study fit with other available evidence? Yes Funding of the Study? Eunice Kennedy Shriver National Institute of Child Health and Human Development Results: The median age was approximately 17 years; predominantly male and from racially minoritized groups. Key Result: Youth frequently used EDs before and after injury, suggesting opportunities for early identification and intervention. Primary Outcome: 12.8% of youth had at least one ED visit in the 90 days before the firearm injury, and 22.1% had at least one in the 90 days after. Secondary Outcomes: Of those with post-injury ED visits, 26% had recurrent trauma; mental health and assault-related visits were common. Listen to the SGEM podcast to hear Samaa answer our five nerdy questions. Confounding by Indication and Unmeasured Covariates: One of the primary threats to internal validity in observational studie
