Purpose
The Delirium Index is an instrument for the measurement of severity of symptoms of delirium that is based solely upon observation of the individual patient, without additional information from family members, nursing staff or the patient's medical chart.
Evidence
1. McCusker J, Cole M, Bellavance F, Primeau F. The reliability and validity of a new measure of severity of delirium. International Psychogeriatrics, 10(4): 421-433, 1998.
2. McCusker J, Cole M, Dendukuri N, Belzile E. The Delirium Index, a measure of the severity of delirium: New findings on reliability, validity, and responsiveness. Journal of the American Geriatrics Society, 52(10):1744-1749, 2004.