A military report on suicide rates broken down by occupation finds the highest rates among categories of troops that often work and train around weapons blasts.
Paywalled, but I wonder if it has to do with tinnitus? I imagine that is just maddening. This isn't anywhere as extreme, but Leonard Nimoy got tinnitus while working on an episode of Star Trek after a squib blew up too close to him and it helped drive him to serious alcoholism which almost totally destroyed his career.
It's a gift link, so you shouldn't hit the paywall if you've got javascript enabled and aren't running a browser extension which strips off the gift token.
I wonder if the lower suicide rate is due to the fact that the individuals with tinnitus actually seek medical attention for it and, as a side effect, get treated for additional health problems as well.
Back in music school, a teacher with tinnitus made us read the suicide note from a guy with severe tinnitus. That really put us straight with regards to wearing ear protection around loud instruments.