Men who own handguns are eight times more likely to die of gun suicides than men who don’t own handguns, and women who own handguns are 35 times more likely than women who don’t, researchers report.

Owning a handgun is associated with a dramatically elevated risk of suicide, according to a new study that followed 26 million California residents over a 12-year period.

The National Suicide Prevention Lifeline telephone number is 1-800-273-8255.

Higher rates of suicide by firearm drove the higher suicide risk, the study shows.

While prior studies have found higher rates of suicide among people who live in homes with a gun, these studies have been relatively small in scale and the risk estimates have varied. The new study is the largest to date, and it’s the first to track risks from the day of an owner’s first handgun acquisition.

“Our findings confirm what virtually every study that has investigated this question over the last 30 years has concluded: Ready access to a gun is a major risk factor for suicide,” says lead author David Studdert, professor of medicine at Stanford Health Policy and of law at Stanford Law School.

The study in The New England Journal of Medicine analyzed data on handgun acquisitions and deaths in a cohort of 26.3 million adult residents of California who had not previously owned handguns. The researchers followed the cohort from 2004 through 2016, and compared death rates among those who did and didn’t acquire handguns, with a particular focus on suicides by firearm versus other methods.

More than 1.4 million cohort members died during the study period. Nearly 18,000 of them died by suicide, of which 6,691 were suicides by firearms.

‘Often impulsive acts’

“Suicide attempts are often impulsive acts, driven by transient life crises,” the authors write. “Most attempts are not fatal, and most people who attempt suicide do not go on to die in a future suicide. Whether a suicide attempt is fatal depends heavily on the lethality of the method used—and firearms are extremely lethal.

“These facts focus attention on firearm access as a risk factor for suicide especially in the United States, which has a higher prevalence of civilian-owned firearms than any other country and one of the highest rates of suicide by firearm.”

There were 24,432 gun suicides in the United States in 2018, according to the Centers for Disease Control and Prevention. Three-quarters of them involved handguns.

The study took advantage of the unusually comprehensive body of information on firearm sales in California. All lawful gun purchases and transfers must be transacted through a licensed firearms dealer, who then relays the information to the state’s Department of Justice, where it is archived. The research team obtained records of all firearm acquisitions dating back to 1985, then linked them to death records.

The researchers found that people who owned handguns had rates of suicide that were nearly four times higher than people living in the same neighborhood who did not own handguns. The elevated risk was driven by higher rates of suicide by firearm. Handgun owners did not have higher rates of suicide by other methods or higher rates of death generally.

The researchers say the very high risk of suicide for female handgun owners, relative to female nonowners, was particularly noteworthy. It has long been known that women attempt suicide more frequently than men but have fewer completed suicides. The standard explanation is that the methods women tend to use are less lethal than those men tend to use. However, the study showed that this is not true for female gun owners.

“Women in our cohort who owned guns and died by suicide usually used a gun,” says coauthor Yifan Zhang, a biostatistician at Stanford Health Policy. “Handgun ownership may pose an especially high risk of suicide for women because of the pairing of their higher propensity to attempt suicide with access to and familiarity with an extremely lethal method.”

Disentangling competing explanations

One major challenge with studies examining the relationship between gun access and suicide risk has been determining whether people who purchase handguns already have plans in place to harm themselves, or whether the presence of a handgun creates new risks.

The unique, longitudinal nature of the study helped to disentangle these competing explanations.

“There appears to be some of both happening,” says senior author Matthew Miller, professor of health sciences and epidemiology at Northeastern University.

“New handgun buyers had extremely high risks of dying by firearm suicide immediately after the purchase. However, more than half of all firearm suicides in this group occurred a year or more later. Consistent with prior work, our findings indicate that gun access poses a substantial and enduring risk.”

Researchers at Stanford, Erasmus University in the Netherlands, and the University of Melbourne in Australia also contributed to the work.

Support for the research came from the Fund for a Safer Future and the Joyce Foundation, as well as Stanford Law School and the Stanford University School of Medicine.

The National Suicide Prevention Lifeline telephone number is 1-800-273-8255.

Source: Stanford University

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