Which of the following is NOT a characteristic associated with Alzheimer's disease?

The presence of delirium is not characteristic of Alzheimer's disease. Alzheimer's is a type of dementia marked by a gradual and progressive decline in cognitive functions, including memory, reasoning, and other mental abilities. Unlike delirium, which is typically acute and reversible, Alzheimer's disease progresses over time and is characterized by stable cognitive deficits rather than sudden changes.

In addition, Alzheimer's commonly presents with deficits that affect multiple cognitive domains, not just a single one, which distinguishes it from other conditions that may only impact specific abilities temporarily. The age of onset for Alzheimer's typically does range from 40 to 90 years, and its progression features a slow, steady decline in cognitive function. Therefore, the distinguishing factor of delirium makes it the correct answer to identify as not being associated with Alzheimer's disease.