Serial administration of a modified richmond agitation and sedation scale for delirium screening
- 15 December 2011
- journal article
- research article
- Published by Wiley in Journal of Hospital Medicine
- Vol. 7 (5), 450-453
- https://doi.org/10.1002/jhm.1003
Abstract
OBJECTIVES: Because delirium is a common yet frequently unrecognized condition, this study sought to design a brief screening tool for a core feature of mental status and to validate the instrument as a serial assessment for delirium. DESIGN: Prospective cohort study. SETTING: Tertiary VA Hospital in New England. PARTICIPANTS: A total of 95 veterans admitted to the medical service. METHODS: A consensus panel developed a modified version of the Richmond Agitation and Sedation Scale (RASS) to capture alterations in consciousness. Upon admission, and daily thereafter, patients were screened with a modified RASS (mRASS) and independently underwent a comprehensive mental status interview by a geriatric expert, who determined whether the criteria for delirium were met. The sensitivity, specificity, and positive likelihood ratio (LR) of the mRASS for delirium are reported. RESULTS: As a single assessment, the mRASS had a sensitivity of 64% and a specificity of 93% for delirium (LR, 9.4). When used to detect change, serial mRASS assessments had a sensitivity of 74% and a specificity of 92% (LR, 8.9) in both prevalent and incident delirium. When prevalent cases were excluded, any change in the mRASS had a sensitivity of 85% and a specificity of 92% for incident delirium (LR, 10.2) CONCLUSION: When administered daily, the mRASS has good sensitivity and specificity for incident delirium. Given the brevity of the instrument (Keywords
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