Schizophrenia is a disease that hasn't got, yet, a well defined etiology. And which diagnosis is still based on the symptoms presented by the patient without a defined clinical test that could tell you, right away, that you suffer from that condition.

Altough this is true, there are some factors that are tought to influence the onset of this disease like drug consumption (for example cannabis) or even other kind of environmental factors (some discussion is going on about this).

I don't know how relevant is the role of Lucid Dreaming on this disease. If you think that 0.4–0.6% of the population may have this disease (based on Wikipedia) and that a small group of them may lucid dream it is a really minimal ammount of people. Also you don't know for sure if they had any of the other factors i talked about before and if they were the real starters of the problem.

I don't contest that eventually it may be a trigger of Schizophrenia. As Lucid Dreaming, with the reality check stuff, wants to make sure you are not dreaming and have a critical aproach to your surroundings making it an habit. It might, in certain suceptible people which have a tendency to have some reality detachment problem, start exarcebating their problem that was latent.

But if you want to directly relate LD with Schizophrenia with a cause-effect behaviour wouldn't that mean that, a lot of people of this forum, on some point of their lives would suffer from it. Also, wouldn't that mean that a natural Lucid Dreamer or even narcoleptics (which experience SP with some hallucinations associated) would, eventually, without any way to avoid it, suffer from this condition sooner or later. Also wouldn't that mean that the Tibetan Dream Yogis would also be exposed to a danger that could increase their chance to suffer from Schizophrenia.

What you mean probably is that you are so interested in lucid dreaming that it has became one of your main goals. This doesn't mean necessarily that you are schizophrenic but does mean that you are taking LD too seriously, like an addiction and that it is making you lose touch with reality. I would suggest taking a break and trying to focus your toughts on something else and avoid it becoming an obsession.

Good luck with it.