Australians with mental health conditions are more than twice as likely to be smokers as the general population. About 22% of people with a mental health condition smoke daily compared to a national rate under 13%. And the more severe your illness, the more likely you are to smoke. For example, about 60-70% of people with psychotic conditions such as schizophrenia smoke.

We don’t have clear evidence for why this is the case, but there are several theories. [...]