Dementia vs Delirium - Key Differences

Last updated on 20/12/2022

Dementia and delirium are both conditions that affect cognitive function, but there are distinct differences.


Feature Delirium Dementia
Onset Sudden, develops quickly Gradual, develops over months or years
Speech Often slurred or confused Usually normal until late stages
Attention Fluctuates throughout the day Generally alert until late stages
Hallucinations Common Possible in some types
Behaviour Suddenly agitated and suspicious Listless or uninterested; may become agitated
Physical Health Often linked to acute (sudden) illness Often other health conditions are present

 

 

About Dementia

  1. A chronic (ongoing) condition that progresses over time
  2. Affects thinking, memory, and daily functioning
  3. Caused by conditions like Alzheimer's, Vascular Dementia, and Lewy Body Disease
  4. Treatment focuses on managing symptoms and supporting quality of life

 

 

About Delirium

  1. A temporary condition that develops suddenly
  2. Symptoms can fluctuate (change) in severity
  3. Can last hours, days, or weeks
  4. Often triggered by medical conditions or medications
  5. Usually improves when the underlying cause is treated