TY - JOUR PY - 2019// TI - American firearm homicides: the impact of your neighbors JO - Journal of trauma and acute care surgery A1 - Olson, Erik J. A1 - Hoofnagle, Mark A1 - Kaufman, Elinore J. A1 - Schwab, C. William A1 - Reilly, Patrick M. A1 - Seamon, Mark J. SP - 797 EP - 802 VL - 86 IS - 5 N2 - BACKGROUND: Restrictive firearm legislation has correlated with decreased overall firearm fatality rates, but not with firearm related homicide or firearm mortality among Black Americans. We hypothesized that firearm trafficking from states with less restrictive firearm legislation to neighboring states with more restrictive firearm legislation increases firearm homicide rates in those restrictive states.

METHODS: For years 2011-2015, state firearm legislation Brady Campaign to Prevent Gun Violence scorecards were analyzed in relation to firearms traced by the Bureau of Alcohol, Tobacco, and Firearms and Center for Disease Control and Prevention firearm mortality rates. States were ranked by Brady score and arranged by quintile to establish the Standardized Brady Score. The effect of less-restrictive neighboring states on the 10 most-restrictive firearm legislation states was modeled by averaging the 10 most-restrictive states with their bordering states to create a Border Adjustment Score. Firearm fatality rates were calculated for each quintile and Poisson regression models were created for each score and outcome. Model fit was compared using Akaike information criterion (AIC).

RESULTS: There were 169,396 firearm fatalities including 57,885 firearm homicides. Comparing top and bottom quintile firearm legislation states, 65% vs 44% of firearms traced by the ATF originated in other states respectively. The Border Adjustment Score generated a more linear relationship than the Standardized Brady Score for all firearm fatality categories as firearm legislation scores decreased. The Border Adjustment Score minimized the AIC with respect to the Standardized Brady Score for black (AIC 4443 vs. 4680) and white firearm homicide rates (3243 vs. 4319), indicating improved model fit after adjustment for neighboring state firearm legislation.

CONCLUSION: Our results suggest that firearm movement across states plays an important role in firearm homicides. Accounting for firearm legislation in both individual and neighboring states may improve our understanding of the relationship between firearm legislation and homicide. LEVEL OF EVIDENCE: Level IV, Prognostic and Epidemiological study.

Language: en

LA - en SN - 2163-0755 UR - http://dx.doi.org/10.1097/TA.0000000000002212 ID - ref1 ER -