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Gun Violence Epidemiology

Violence and Firearm Injury Epidemiological Studies Using National and State Databases

In collaboration with Drs. Elinore Kaufman (University of Pennsylvania), Eduard Coupet (Yale), and Douglas Wiebe (University of Pennsylvania), we have investigated epidemiological trends in gun violence.

To accomplish these objectives, we have used large national and state datasets to describe the epidemiology of nonfatal and fatal injuries from violence and firearms in terms of health outcomes and costs.

Areas of Interest


ED Encounters


Fatal and Non-Fatal Injuries


Law Enforcement Involved Shootings


Degli Esposti M, Gravel J, Kaufman EJ, Delgado MK, Richmond TS, Wiebe DJ. County-Level Variation in Changes in Firearm Mortality Rates Across the US, 1989 to 1993 vs 2015 to 2019. JAMA Network Open. 2022 Jun 1;5(6):e2215557-.

Kaufman EJ, Wiebe DJ, Delgado MK. The Problem With ICD-Coded Firearm Injuries—Reply. JAMA internal medicine. 2021 Aug 1;181(8):1133-4.

Kaufman EJ, Wiebe DJ, Xiong RA, Morrison CN, Seamon MJ, Delgado MK. Epidemiologic trends in fatal and nonfatal firearm injuries in the US, 2009-2017. JAMA internal medicine. 2021 Feb 1;181(2):237-44.

Coupet E, Huang Y, Delgado MK. US emergency department encounters for firearm injuries according to presentation at trauma vs nontrauma centers. JAMA surgery. 2019 Apr 1;154(4):360-2.

Coupet E, Huang Y, Delgado M. US Emergency Room Department Encounters for Firearm Injuries, 2009-2014.

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