I suspect so. My Father was only observing what he saw. He wasn't researching the cause. The key take away for me was that he was working with young people. I

I suspect so. My Father was only observing what he saw. He wasn't researching the cause. The key take away for me was that he was working with young people. I suspect these people may have ended up in mental health care but much later in life. If this were true you'd expect less of the later in life diagnoses to be drug related. I have no data on that.