This document discusses delirium in older patients. It notes that 11-42% of older adults develop delirium while hospitalized, which can lead to prolonged hospitalization, functional decline, and increased mortality. The Confusion Assessment Method (CAM) is highlighted as a tool to screen for delirium, with a sensitivity of 94-100% and specificity of 89-95%. The document also provides information on the different types of delirium (hypoactive, hyperactive, and mixed) and their prevalence.