A total of 4,434 unique patient records were identified from a State of Maryland database from seven inpatient mental health facilities between 1994 and 2000. Of 4,434 subjects, 1,222 met the criteria for schizophrenia, schizoaffective disorder or psychosis not otherwise specified (NOS) and were 18 to 55 years of age. Of the 1,222, 762 had clinical charts with race and drug use information available. Drug use information was collected from charts using an algorithm and specific intake forms detailing drug use histories.
