Ok, I had to skip a lot of the comments because they were getting out of control, but this sounds like a preliminary study. There needs to be a control group, and an understanding that correlation and causation are not the same thing. There are plenty of external factors at work here. It's not such an unlikely hypothesis because schizophrenia does usually start in late adolescence and mind altering drugs might help it along. On the other hand, almost everyone I know smoked pot as a teenager or young adult and none of them are schizophrenic. I really doubt that it would induce it in someone who wasn't already predisposed.
Abusive comment hidden.
(Show it anyway.)