TY - CHAP M1 - Book, Section TI - Chapter 6. Delirium and Dementia A1 - Kane, Robert L. A1 - Ouslander, Joseph G. A1 - Abrass, Itamar B. A1 - Resnick, Barbara Y1 - 2013 N1 - T2 - Essentials of Clinical Geriatrics, 7e 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 the ability to function independently. Impaired cognitive function can be acute in onset, or it can be manifest by slowly progressive cognitive impairment. 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. Prevalence rates are, however, highly dependent on the criteria used to define dementia (Mayeux, 2010). Between 25% and 50% 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 age 65 years have some degree of cognitive impairment. 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 (Okie, 2011). SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/04/18 UR - accessmedicine.mhmedical.com/content.aspx?aid=57732228 ER -