About two-thirds of the patients were men. Patients' mean age was 37.3±5.8 to 28.8±7.5 years (range, 20 to 49 years). More than half of them (17 to 20 in each group) were taking a medium dosage of antipsychotics (haloperidol equivalent mean values [12] of between 8.30±7.02 and 10.34±8.13 mg/day). Two-thirds of the patients (21 to 23 patients, or 66 to 70 percent) in the three groups were taking oral medication, and one-fifth (six or seven patients, or 19 to 23 percent) were taking both oral and depot intramuscular medications. Nearly half the patients in the three groups were taking atypical neuroleptics (14 to 16 patients, or 45 to 49 percent). The mean duration of illness was just over two years (six months to five years).