It's very common in Canada in general on mental health issues for people to delay seeking help. I'm not sure if it's denial or if they're hoping they can solve the problem themselves. I'm not sure.
With respect to the post-employment process, when they have the screening done there are two parts to the screening. The first is the mental health questionnaire that they complete, and there are a number of validated instruments within that looking for different specific things. Then they have a one-on-one confidential interview with a mental health care professional.
Based on those two things, the screening questionnaire and the interview, if there is any concern that there is any symptom of an operational stress injury, or any other mental health concern, then they are referred for further assessment by mental health care professionals that goes into much more depth and detail.