{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,31]],"date-time":"2026-01-31T10:22:05Z","timestamp":1769854925854,"version":"3.49.0"},"reference-count":29,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2006,9,5]],"date-time":"2006-09-05T00:00:00Z","timestamp":1157414400000},"content-version":"vor","delay-in-days":4,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int J Geriat Psychiatry"],"published-print":{"date-parts":[[2006,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Delirium is the most common acute neuropsychiatric disorder in hospitalized elderly. The Dutch version of the Delirium Rating Scale\u2014Revised\u201098 (DRS\u2010R\u201098) appears to be a reliable method to classify delirium. The aim of this study was to determine the validity and reliability of the DRS\u2010R\u201098 and to study clinical subtypes of delirium using the DRS\u2010R\u201098.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Patients received the Dutch version of the DRS\u2010R\u201098, the Mini\u2010Mental State Examination, the Confusion Assessment Method, and a clinical diagnosis of delirium according to DSM\u2010IV criteria, and their relatives the Informant Questionnaire Cognitive Decline in the Elderly.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The DRS\u2010R\u201098 validation cohort (<jats:italic>n<\/jats:italic>\u2009=\u200965) consisted of 23 patients with delirium, 22 patients with dementia, and 20 non\u2010psychiatric comparison patients. For the delirium subtype study, a second cohort comprising 54 delirious patients was investigated. Median DRS\u2010R\u201098 scores significantly distinguished delirium from dementia and no psychiatric disorder. Inter\u2010rater reliability (intra\u2010class correlation 0.97) and internal consistency (Crohnbach's alpha 0.94) were high. Positive scores of DRS\u2010R\u201098 item 4 (affect liability) and item 7 (motor agitation) predicted the presence of non\u2010hypoactive delirium, with a specificity of 89% and a sensitivity of 57%.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The results show that the Dutch version of the DRS\u2010R\u201098 is a valid and reliable measure of delirium severity and distinguishes patients with delirium from patients with dementia and comparison patients. Furthermore, the DRS\u2010R\u201098 is able to exclude hypoactive delirium. 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