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CHARLSON: Stata module to calculate Charlson index of comorbidity


  • Vicki Stagg

    (Faculty of Medicine, University of Calgary)

Programming Language



This command, based on a SAS program written by Dr. Hude Quan (Quan H et al. Coding algorithms for defining comorbidities in ICD-9-CM and ICD-10 administrative data. Medical Care 2005 Nov; 43(11):1073-1077.), calculates the Charlson index of comorbidity from data containing ICD-9-CM, ICD-10 or Enhanced ICD-9-CM comorbidity diagnoses codes. The Charlson score reflects the cumulative increase in likelihood of one-year mortality due to the severity of the effect of comorbidities.

Suggested Citation

  • Vicki Stagg, 2006. "CHARLSON: Stata module to calculate Charlson index of comorbidity," Statistical Software Components S456719, Boston College Department of Economics, revised 13 Sep 2017.
  • Handle: RePEc:boc:bocode:s456719
    Note: This module should be installed from within Stata by typing "ssc install charlson". The module is made available under terms of the GPL v3 ( Windows users should not attempt to download these files with a web browser.

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