CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne
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To determine the prognosis of delirium in elderly patients. ⋯ Delirium in the elderly appears to have a poor prognosis. However, this finding may have been confounded by the presence of concomitant dementia or severe physical illness. Future studies must pay attention to methods and design, particularly the composition of study populations and the control of extraneous prognostic factors.