39 bipolar disorder patients, 18 schizophrenia patients and 15 controls were recruited for this study, but usable data were obtained from 17 bipolar disorder patients, 14 schizophrenia patients, and 15 healthy controls. Reasons for the high rate of attrition included patients’ inability to complete the scan, excessive motion during the scan, and substance use disorder revealed subsequent to the scan. Bipolar disorder subjects who did not complete the study (N=22) had markedly more severe psychotic symptoms (PANSS:82.0) as well as moderately more severe manic and depressed symptoms (YMRS=26.9; MADRS=18.4) than those who did.
