By Avneet Bhullar, Jonathan Shipley, […], and Jeffry Nahmias, , et al,

Background

In January of 2019, Washington State (WA) passed Initiative 1639 making it illegal for persons <21 years-old to buy assault weapons (AWs). This study aimed to evaluate the effects of WA-1639 on firearm-related incidents involving AWs by those <21 years-old in WA, hypothesizing a decrease in incidents after WA-1639.

Methods

Retrospective (2016-2021) data on firearm violence (FV) events were gathered from the Gun Violence Archive. The rate of FV was weighted per 100,000 people. Total monthly incidents, injuries, and deaths were compared pre-law (January 2016-December 2018) vs post-law (January 2019-December 2021) implementation. Mann-Whitney U tests and Poisson’s regression were used for analysis.

Results

From 4091 FV incidents (2210 (54.02%) pre-law vs 1881 (45.98%) post-law), 50 involved AWs pre- (2.3%) and 15 (.8%) post-law. Of these, 11 were committed by subjects <21 years-old pre-law and only one occurred post-law. Total incidents of FV (z = −3.80, P < .001), AW incidents (z = −4.28, P < .001), and AW incidents involving someone <21 years-old (z = −3.01, P < .01) decreased post-law. Additionally, regression analysis demonstrated the incident rate ratio (IRR) of all FV (1.23, 95% CI [1.10-1.38], P < .001), all AW FV incidents (3.42, 95% CI [1.70-6.89], P = .001), and AW incidents by subjects <21 years-old (11.53, 95% CI [1.52-87.26], P = .02) were greater pre-law vs post-law.

Discussion

Following implementation of WA-1639, there was a significant decrease in FV incidents and those involving AWs by individuals <21 years-old. This suggests targeted firearm legislation may help curtail FV. Further studies evaluating FV after legislation implementation in other states is needed to confirm these findings.

The American SurgeonTM. 2024;0(0). doi:10.1177/00031348241244644 (Online First)

by Sierra Smucker, Max Griswold, Amanda Charbonneau, Rose Kerber, Terry L. Schell, Andrew R. Morral

Among researchers, policymakers, and advocates, momentum is growing to better understand the impact of firearm laws on a variety of outcomes (e.g., suicide, crime, defensive gun use, homicide). There is also a growing interest in data that can shed light on these relationships. One source of these data is the National Instant Criminal Background Check System (NICS). This system includes information used in background checks, the number and type of background checks processed, and details on the number of and reason for denials when NICS finds that an individual is prohibited from purchasing a firearm. In this tool, researchers provide detailed information about data associated with NICS and discuss the data's strengths and weaknesses for various gun policy evaluation objectives. The researchers also outline the substantial limitations to interpreting these data to assist researchers in this field. Finally, they provide these data to researchers to encourage further exploration and evaluation of how NICS data might be used for policy analysis.

Santa Monica, CA: RAND, 2022. 65p.

By Garen Wintemute

Firearm-related criminal violence remains an important threat to the nation’s health and safety. To help prevent firearm violence, federal statute prohibits felons, those convicted of domestic violence misdemeanors, and certain others from acquiring or possessing firearms. Persons who acquire firearms from licensed gun dealers and pawnbrokers must provide identification and undergo a background check to verify that they are not prohibited persons. A permanent record is kept, in case the firearm is later used in a crime. But perhaps 40% of all firearm acquisitions, and at least 80% of those made with criminal intent, are made from private parties. No identification need be shown; no background check is conducted; no record is kept. Identifying prohibited persons through background checks and denying their firearm acquisitions has been shown to reduce their risk of committing new firearm-related or violent crimes by approximately 25%. Policies that require all firearm transfers to be routed through licensed retailers, so that background checks are completed and records are kept, are in effect in six states. Their feasibility is proved. At gun shows in states where such policies are in effect, direct private-party firearm transfers rarely occur. Comprehensive background check policies have been shown to disrupt firearm trafficking and to yield more accurate, up-to-date firearm tracing information for law enforcement. The impact of state-level policies, however, is blunted by firearm trafficking from states where such policies are not in effect.

Davis, CA: Violence Prevention Research Program, University of California, Davis. 2013. 58p.