alexa The CAM-S: development and validation of a new scoring system for delirium severity in 2 cohorts.
Medicine

Medicine

Journal of Gerontology & Geriatric Research

Author(s): Inouye SK, Kosar CM, Tommet D, Schmitt EM, Puelle MR,

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Abstract BACKGROUND: Quantifying the severity of delirium is essential to advancing clinical care by improved understanding of delirium effect, prognosis, pathophysiology, and response to treatment. OBJECTIVE: To develop and validate a new delirium severity measure (CAM-S) based on the Confusion Assessment Method. DESIGN: Validation analysis in 2 independent cohorts. SETTING: Three academic medical centers. PATIENTS: The first cohort included 300 patients aged 70 years or older scheduled for major surgery. The second included 919 medical patients aged 70 years or older. MEASUREMENTS: A 4-item short form and a 10-item long form were developed. Association of the maximum CAM-S score during hospitalization with hospital and posthospital outcomes related to delirium was evaluated. RESULTS: Representative results included adjusted mean length of stay, which increased across levels of short-form severity from 6.5 days (95\% CI, 6.2 to 6.9 days) to 12.7 days (CI, 11.2 to 14.3 days) (P for trend < 0.001) and across levels of long-form severity from 5.6 days (CI, 5.1 to 6.1 days) to 11.9 days (CI, 10.8 to 12.9 days) (P for trend < 0.001). Representative results for the composite outcome of adjusted relative risk of death or nursing home residence at 90 days increased progressively across levels of short-form severity from 1.0 (referent) to 2.5 (CI, 1.9 to 3.3) (P for trend < 0.001) and across levels of long-form severity from 1.0 (referent) to 2.5 (CI, 1.6 to 3.7) (P for trend < 0.001). LIMITATION: Data on clinical outcomes were measured in an older data set limited to patients aged 70 years or older. CONCLUSION: The CAM-S provides a new delirium severity measure with strong psychometric properties and strong associations with important clinical outcomes. PRIMARY FUNDING SOURCE: National Institute on Aging.
This article was published in Ann Intern Med and referenced in Journal of Gerontology & Geriatric Research

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