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National Cancer Data Base - Data Dictionary PUF 2013

Comorbid Conditions

Comorbid disease burden is represented in the PUF as a score. This score is based on the Deyo adaptation (1992) of Charlson's comorbidity index and can be used as a mechanism to control for pre-existing medical conditions that may affect treatment decisions. The score is mapped from as many as ten reported ICD-9-CM secondary diagnosis codes.