I am a military personnel selection officer by trade. Thus, I am somewhat familiar with the selection process.
Any selection tool implemented at recruitment must allow us to anticipate certain things with a certain degree of certainty. It is not necessarily easy to determine who will develop operational stress injury. To my knowledge, there is no tool that would allow us to do that.
I know that the people in the Canadian armed forces have wondered whether we should develop recruiting tools. It is true that there are none at this time. Nevertheless, we do checkups before deployment. The soldier must meet a social worker before being deployed and make sure that his medical tests are completed. He must also meet the physical requirements. This stage involves another, micro-selection process.