Table 2.

Delirium assessment methods

Delirium screening tool	Criteria on which Scale was based	Number of items	Time to complete (minutes)	Ratings done by
CAM-ICU [102]	DSM-IV	9	≤ 2	Trained health professional
ICDSC [103]	DSM-IV	8	7–10	Non-specialist staff
DRS-R-98 (106)	DSM-IV	16	10	Psychiatrists
NEECHAM Confusion Scale [107]	Research	9	10	Nurses
Delirium Observation Screening Scale [108]	DSM-IV	25	5–10	Research Assistant
Nursing Delirium Screening Scale [109]	Research	5	1	Nurses

CAM-ICU Confusion Assessment Method for the ICU, DSM Diagnostic and Statistical Manual for Mental Disorders, ICDSC Intensive Care Delirium Screening Checklist, DRS-R-98 Delirium Rating Scale-Revised 98, NEECHAM Neelon-Champagne