Answer: The key difference between delirium and dementia is that delirium has a rapid onset while dementia has a gradual onset.
Step-by-step explanation: Delirium is an acute medical condition that can be caused by a medical condition or substance. It is characterized by a sudden change in mental status, confusion, disorientation, and agitation. On the other hand, dementia is a chronic condition that affects cognitive function and memory. It is characterized by a gradual decline in cognitive function and memory over time. Hope this helps, and have a great day!