Clinical Trial Protocol: Alzheimer's Dementia Underlying Encephalopathy

This study is investigating whether hospitalized older adults who develop sudden confusion (delirium or encephalopathy) may have underlying Alzheimer's disease that hasn't been diagnosed yet. The goal is to catch early signs of Alzheimer's and understand the relationship between acute brain events and dementia. **You may be eligible if...** - You are between 60 and 90 years old - You have NOT been previously diagnosed with dementia - You are currently hospitalized and have been diagnosed with delirium, encephalopathy, or a similar condition thought to be caused by a medical issue (like infection, medication effects, or metabolic imbalance) **You may NOT be eligible if...** - You are under 60 years old - You have already been diagnosed with dementia or another organic cause of cognitive impairment Talk to your doctor to see if this trial is right for you.