It affects the probability someone in your family will die this year. Having a doctor discuss this with you is one way of a) providing regular reminders of the importance of safety b) in a confidential environment.
In the interest of fairness I want to relate a personal experience.
My mother tried to kill herself 3 times that I know of. Each time she was unsuccessful. However, I would describe her attempts as intended to be attempts, if you know what I mean and not to be insensitive.
My sister made three attempts to kill herself. Once she was unsuccessful, twice someone intervened and saved her life, otherwise she absolutely would have died.
My father attempted suicide one time and successfully killed himself.
The difference...My father used a gun.
I do believe having a gun in the home increases the chance that someone will be harmed more than it increases the chance that someone will be saved.
That said, I support a person's right to use a gun for self defense.