Organic Brain disorder - Dementia vs Delirium

S.No.	CHARACTERISTICS	DEMENTIA	DELIRIUM
1.	Onset	Insidious	Acute
2.	Course	Fluctuating	Progressive
3.	Duration	Months to Years	Days to Months
4.	Severity	Moderate	High
5.	Risk factor	Aging	Previous medical condition
6.	Reversibility	Irreversible but depends on the cause	Reversible
7.	Main cause	Genetics, brain trauma, stroke, heart issues.	Previous medical condition, abuse of medication, alcohol or drug withdrawal, mental illness.
8.	Treatment	FDA approved drugs can slow the progress of the condition.	Can be cured with timely diagnosis and intervention.
9.	Activities of Daily Living	No disturbances until later stages.	Either over active or under active.
10.	Attention	Not affected until later stages.	Very poorly affected.
11.	Speech	Normal	Slurred
12.	Hallucination	Less common	More common
13.	Consciousness	Clear until later stage	Fluctuating
14.	Memory	Recent memory impaired, confabulation, perseveration	Recent memory impaired
15.	Sleep	Worse in evening, sun downing	Worse at night
16.	Psychomotor activity	Often normal	Increased or decreased