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Case-control studies show an association between firearms in the home and completed suicide, with higher risks associated with loaded guns and handguns in the home. Quasi-experimental studies also show a relationship between greater restrictiveness of gun control laws and lower suicide rates by firearms and overall, although some studies fail to show an effect or show method substitution. A prospective study shows that handgun purchasers have an elevated risk for suicide for up to 6 years after the purchase. Relatively few studies have examined the impact of intervention to encourage families to store guns safely or remove firearms from the home on suicidal outcome.
Brent et al. (Thu,) studied this question.