The goal of this study was to characterize the symptoms of geriatric, chronically ill, institutionalized schizophrenic patients and investigate age-related differences in schizophrenic symptoms and cognitive performance from early adulthood to late senescence.

Davidson M, Harvey PD, Powchik P, Parrella M, White L, Knobler HY, Losonczy MF, Keefe RSE, Katz S, Frecska E. Severity of symptoms in geriatric schizophrenic patients. American Journal of Psychiatry, 1995; 152(2): 197-207.