Around 60-90% of people with schizophrenia are estimated to smoke, compared with 15-24% of the adult general population. The association between smoking and mental health conditions becomes stronger relative to the severity of the mental health condition, with the highest levels of 70% smoking found in psychiatric in-patients. Rates of cigarette smoking amongst adults in the United States and United Kingdom are two to four times higher in people with current mood, anxiety, and psychotic disorders than in those without mental illness.