• Philippe Landreville, Philippe Voyer, and Pierre-Hugues Carmichael.
• School of Psychology, Université Laval, Québec, Canada. philippe.landreville@psy.ulaval.ca
• Int Psychogeriatr. 2013 Apr 1; 25 (4): 635-43.

BackgroundPersons with dementia frequently present behavioral and psychological symptoms as well as delirium. However, the association between these has received little attention from researchers and current knowledge in this area is limited. The purpose of this study was to examine the relation between delirium and behavioral symptoms of dementia (BSD).MethodsParticipants were 155 persons with a diagnosis of dementia, 109 (70.3%) of whom were found delirious according to the Confusion Assessment Method. BSD were assessed using the Nursing Home Behavior Problem Scale.ResultsParticipants with delirium presented significantly more BSD than participants without delirium. More specifically, they presented more wandering/trying to leave, sleep problems, and irrational behavior after controlling for cognitive problems and use of antipsychotics and benzodiazepines. Most relationships between participant characteristics and BSD did not differ according to the presence or absence of delirium, but some variables, notably sleep problems, were more strongly associated to BSD in persons with delirium.ConclusionsAlthough correlates of BSD in persons with delirium superimposed on dementia are generally similar to those in persons with dementia alone, delirium is associated with a higher level of BSD. Results of this study have practical implications for the detection of delirium superimposed on dementia, the management of behavioral disturbances in patients with delirium, and caregiver burden.

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