The American journal of psychiatry
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The objective of this study was to determine empirically how many patients are identified as delirious or nondelirious according to DMS-III, DMS-III-R, and ICD-10 criteria. ⋯ The development of new criteria for delirium (e.g., DSM-IV) will have to balance the need to define a pure group of patients for research purposes with the need to include cases of clinical interest. Changes in criteria should be based on data such as those presented in this paper.