Earlier quoted context omitted.
> The real world evidence is that if you got rid of guns in an attempt to stop suicides, the strong majority of those who want to commit suicide would find another method. What does "real world" evidence mean? Because real world evidence from England (paracetamol pack sizes; switch to natural gas from coal gas; removing coproxamol from general use) shows that many people do not find another method.
The real world evidence in the comment you replied to, from the paragraph that you selected your quote from. 1. About half of US households have access to gun, implying half do not. Suicide-by-gun is about half the total suicide rate. With the assumption that people kill themselves with a gun if it's available, the no-gun-in-household suicide rate is very similar to the gun-in-household suicide rate. 2. The fact that…
Don't think that an attempted suicide by gun is the same as an attempt using another method. Guns are a very lethal method of suicide. Other methods of suicide are not as sure. This might explain the differences in completed suicide numbers for men and women (more men die to suicide) and rates of self harm (very many more women self harm) -- men might be using more lethal methods.
Some members of the "want to use a gun as a method of suicide group" would use a different method and would complete suicide. But certainly not all that group. Some would use a less fatal method and attempt suicide but not die. Others would find help before attempting suicide.
For a tiny US example: look at the Taft and Ellington Bridges in Washington State. They were both used by people to complete suicide, although more people used Ellington. After a number of people dying to suicide in a short number of days a suicide barrier was put up. People did not switch to the other bridge, even though it was close.
http://cebmh.warne.ox.ac.uk/csr/
Again: look at the rates of completed suicide in England after switching gas supplies; after removing coproxamol from general use; and after reducing the amount of paracetamol. All of these resulted in permanent drops in the suicide rate.