ICU psychosis lasts about how many days?

Rationale: A. This option is incorrect because ICU psychosis, more accurately referred to as ICU delirium, is a well-recognized and documented condition in critically ill patients. It is characterized by acute changes in cognition, attention, and level of consciousness due to factors such as illness severity, medications, sleep deprivation, and environmental stressors. B. This option is incorrect because although symptoms may improve after transfer out of the ICU, ICU delirium does not always resolve immediately upon discharge. Many patients continue to experience cognitive disturbances for days or weeks afterward. C. This option is incorrect because ICU psychosis does not typically last only a few hours. While symptoms can fluctuate throughout the day, the condition generally persists for several days rather than resolving quickly. D. 1–7 days but can persist for months/years is correct because ICU psychosis commonly lasts several days during critical illness, but research shows that cognitive impairment may persist long-term in some patients, especially older adults or those with severe illness, leading to prolonged or even permanent cognitive deficits.