A charge nurse in a long-term care facility is preparing an educational program about delirium for newly hired nurses. Which of the following statements should the nurse plan to Include?

The correct answer is A: Delirium has an abrupt onset. Delirium typically manifests suddenly with rapid changes in mental status. This is crucial for nurses to recognize promptly to intervene effectively. Choice B is incorrect because delirium does affect a client's perception of the environment. Choice C is incorrect as delirium is characterized by an acute and fluctuating course, not a slow progression. Choice D is incorrect as delirium often disrupts the sleep cycle, leading to disturbances. It is important for nurses to understand these key features of delirium to provide appropriate care.