- All patients included in the study will have a Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) diagnosis of schizophrenia or schizoaffective disorder. Outpatients with schizophrenia (DSM-IV 295.00, 295.10, 295.30, 295.60, 295.90) or schizoaffective disorder (DSM-IV 295.70) will be the primary source of subjects for this project, although inpatients that are being discharged will also be acceptable. All patients will be followed longitudinally.