[skylerwiernik]

Interesting. What causes this? Could it have to do with the type of person to keep a gun in a safe (has kids, is more cautious in general, etc) or have studies shown that this minor friction is actually enough?

[ceejayoz]

Suicide tends to be impulsive. Any friction, even brief, can give an opportunity to think twice.

[bombcar]

That was the general conclusion as I recall it. Originally it was thought to be "someone else has the key" kind of things - which of course, does limit it - but even controlling for "I have to walk downstairs and find the key" reduces it.