Researchers from Boston Children’s Hospital and Harvard Medical School and School of Public Health found that a higher number of firearm-control laws in a state are associated with a lower rate of firearm fatalities, both overall and for suicides and homicides individually. The group retrospectively analyzed all firearm-related deaths reported to the CDC’s Injury Statistics Query and Reporting System from 2007 through 2010.
Their outcome measures were state-level firearm-related fatalities per 100,000 individuals per year overall, for suicide, and for homicide. They controlled for age, sex, race/ethnicity, poverty, unemployment, college education, population density, nonfirearm violence-related deaths, and household firearm ownership.
The researchers said their study could not determine cause-and-effect relationships and that further studies are necessary to define the nature of the association.