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Differentiating Behavioral Disturbances of Dementia From Symptoms of Delirium

Delirium is a recognized cause of behavioral disturbances of dementia. Yet the proportion of cases of behavioral disturbances resulting from delirium is difficult to determine. In many epidemiologic studies, delirium is excluded as a causal factor. In the few studies that describe delirium as an underlying cause of behavioral disturbances, the mechanism by which delirium is diagnosed and the extent of the diagnostic workup are rarely delineated.