• Seven systems for the diagnosis of schizophrenia were compared in their ability to predict short-term outcome at follow-up: (1) with each other, (2) with selected specific symptoms, and (3) with a simple additive composite symptom score. None of the systems nor the symptoms predicted strongly, but DSM-III and Schneiderian First Rank Symptoms and the composite score performed somewhat better than the other predictors.
Endicott J, Nee J, Cohen J, Fleiss JL, Simon R. Diagnosis of Schizophrenia: Prediction of Short-term Outcome. Arch Gen Psychiatry. 1986;43(1):13–19. doi:10.1001/archpsyc.1986.01800010015002
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