Charlson Comorbidity Index.

Charlson ME, Pompei P, Ales KL, MacKenzie CR.

"A new method of classifying prognostic comorbidity in longitudinal studies: development and validation."
J Chron Dis 1987;40:373-83

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I➜The Charlson Comorbidity Index contains 19 categories of comorbidity and predicts the ten-year mortality for a patient who may have a range of co-morbid conditions. Each condition is assigned with a score of 1,2,3 or 6 depending on the risk of dying associated with this condition. For a physician, it is helpful in knowing how aggressively to treat a condition. Higher scores indicating greater comorbidity (patients with a score > 5 have essentially a 100% risk of dying at one year). For example, a patient may have cancer, but also heart disease and diabetes so severe that the costs and risks of the treatment outweigh the short term benefit from treatment of the cancer. Also abbreviated CCI, this scoring system replaces direct measures of the severity of an illness, which require a prospective data collection. Many adaptations of the CCI have been publicated, including the Charlson-Deyo, Charlson-Romano, Charlson-Manitoba, and Charlson-D'Hoores comorbidity indices.

A SAS macro (based on the original publication) is available from MCHP Website. Charlson Index SAS macro

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