The idea of the healthy soldier effect really is at a general level. When you're looking at a population, soldiers are generally healthier, and so you'd expect a lower rate. But in the case you're describing, the person now has to cope with the loss and the injury and can't seem to figure out how to live with that loss, and how it's going to affect their career and their family. During that time they might become depressed, and if there are any alcohol issues, they might have impulsivity.
On November 18th, 2010. See this statement in context.