Cigarette smoking among patients with schizophrenia and bipolar disorders.

The purpose of the present study was to investigate the ratio of smokers and the relationship of cigarette smoking to clinical features in patients with schizophrenia and bipolar disorders. One hundred and forty-four patients with schizophrenia or bipolar disorder along with 114 healthy controls were evaluated. A total of 57.5% of the patients with schizophrenia, 55.1% of the bipolar patients and 47.3% of the control group were smokers. Daily cigarette consumption among the patients with schizophrenia was higher than that for the bipolar patients, and control group. Among the patients with schizophrenia who were in acute psychotic episode, Scale for the Assessment of Positive Symptoms scores of the smokers were significantly higher.