Sure. There's a lot to unpack, and I'll start with the last point you were mentioning.
When you look at schizophrenia, one of the most robust statistics that we have on it is that about 1% of the population will have schizophrenia. In British Columbia, where there are about 5 million people living in the province, there will be about 50,000 people with schizophrenia. Then, when you take those folks with schizophrenia, about 20% will be able to take medication, never have a relapse and live pretty normal lives. Meanwhile, 50% will have a relapsing-remitting illness, and 30% won't respond to medication.
What do you do with those folks who don't respond to medication? There's also a high amount of substance use within this population. If you have an intrinsic organic illness that causes you to have psychosis, a lot of times substances like crystal meth or cannabis-use disorder....
In my treatment facility, crystal meth is the most common substance used. It is used by about two-thirds of the clients, and about half also use cannabis. When they use these substances, it actually destabilizes them as well.
You were speaking about the closing of mental health facilities. Riverview closed down; that was the big asylum in British Columbia. My friend and colleague Dr. Christian Schütz did a study, and what he saw was that 10% of the folks in the Downtown Eastside were old Riverview patients. This was back in 2005, I think, so it's an older study, but it shows what happens when these folks aren't housed. We're talking about thousands and thousands of these people, so you do have to provide long-term supportive housing for these individuals. I think that's one of the key things that's missing in the spectrum.
At this moment, I'm in Switzerland trying to figure out how they are treating substance use and mental illness so differently and why they have much better retention rates. One of the things they have is wraparound services, and they have supportive housing, so every patient will get a social worker and a nurse and a family physician, and they'll get a psychiatrist, and these folks will follow them longitudinally in the community. Also, with the housing, they'll have support getting medications provided to them.
There's so much more support out there in the community, which we don't seem to have in Canada, in comparison with Switzerland.
Regarding your first question about violence and mental health issues, I actually don't have any statistics on that. I can tell you anecdotally what I've been seeing.
One of the things I do is overnight assessments for the courts. What happens is that someone commits a crime and gets arrested, and then there are concerns about their mental health and whether they should be at their bail hearing the next day. I am asked to assess the patient to see whether they are mentally well enough to go to court the next day.
Before the pandemic, roughly one in five folks I saw for overnight assessments were in for random stranger attacks. They didn't know the victim, and, for whatever reason, whether it was an intrinsic organic psychosis or a substance-induced psychosis, they went and attacked someone.
A couple of years ago, that became one in two. There was a dramatic increase in stranger attacks. Now I think it has decreased to maybe one in three, but there has been an increase. I think there are a lot of issues with this. I think one was the destabilization that occurred with COVID, and two—