Suicide is an impulsive act. Half of suicide survivors report planning their deaths for less than ten minutes. States like Connecticut that have passed background check laws for handguns have seen precipitous drops in firearm suicides, and states with more lax gun laws experience higher gun mortality of all types. States that have repealed background checks for handguns saw increases in firearm suicides.
The most gun-suicidal populations are older white men and veterans. Guns are only used in a small minority of suicide attempts, but half of all successful suicides are firearm suicides.
By Cory Doctorow at https://boingboing.net/2018/12/28/gun-deaths.html