It can have a great deal of impact, in my experience, and even have impact before then. It's not uncommon that a crown will say, your client pleads guilty, and my position is x or y depending upon what's in the pre-sentencing report. It even goes back into what the crown will suggest for a sentence, and then it impacts the judge. It can have a great deal of impact.
It also is the whole life of the person. I think of what my friend said about how someone who has a brain injury might have a hard time in jail. That impacts it.
Those are the same considerations as when someone has late-stage cancer or some sort of physical abnormality that makes it hard for them to be in jail. I don't think you could legislate and say that a parole officer has to go and get this person's medical record and put it in the pre-sentencing report. That would be inappropriate.
This is exactly the same thing. There's no difference between having cancer and schizophrenia. It's all just health. That's the problem, in my view.