TY - CHAP M1 - Book, Section TI - Delirium and Dementia A1 - Kane, Robert L. A1 - Ouslander, Joseph G. A1 - Resnick, Barbara A1 - Malone, Michael L. Y1 - 2017 N1 - T2 - Essentials of Clinical Geriatrics, 8e AB - Diagnosis and management of geriatric patients exhibiting symptoms and signs of impaired cognitive functioning can make a critical difference to their overall health and their ability to function independently. Impaired cognitive function can be acute in onset, or it can be slowly progressive. The major causes of impaired cognition in the geriatric population are delirium and dementia. As more people live into the tenth decade of life, the chance that they will develop some form of dementia increases substantially. Community-based studies report a prevalence of dementia as high as 47% among those 85 years of age and older. Recent evidence suggests that the incidence of dementia is decreasing in more recent cohorts of people studied (Larson et al, 2013; Satizabal et al, 2016). Between 25% and 40% of older patients admitted to acute care medical and surgical services are delirious on admission or develop delirium during their hospital stay. In nursing homes, 50% to 80% of those older than 65 years of age have some degree of cognitive impairment which can range from mild cognitive deficits to end-stage dementia. Dementia is a major risk factor for delirium, and delirium is often superimposed on dementia in both hospital and community settings, can persist for days to weeks after discharge from an acute hospital, and is a risk factor for functional decline and mortality. Both dementia and delirium are associated with high health-care costs (Amjad et al, 2016; Okie, 2011). SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/19 UR - accessmedicine.mhmedical.com/content.aspx?aid=1149536136 ER -