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Clinical calculator summary

Charlson Comorbidity Index

The Charlson Comorbidity Index predicts the one-year mortality for a patient who may have a range of comorbid conditions, such as heart disease, AIDS, or cancer (a total of 22 conditions).

Evidence-based context for fast calculator use

Purpose:
Charlson Comorbidity Index estimates 10-year survival by scoring 17 comorbid conditions and age to stratify mortality risk for treatment planning.
Population:
patients whose general oncology assessment matches the intended use of the selected score
Factors:
Age, Myocardial Infarction, Congestive Heart Failure, Peripheral Vascular Disease, CVA / TIA, Dementia, COPD, Connective Tissue Disease
Reference:
Charlson ME, Pompei P, Ales KL, MacKenzie CR. A new method of classifying prognostic comorbidity in longitudinal studies: development and validation. J Chronic Dis. 1987;40(5):373-383.
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Charlson Comorbidity Index

years

Clinical Context & Background

The Charlson Comorbidity Index predicts the one-year mortality for a patient who may have a range of comorbid conditions, such as heart disease, AIDS, or cancer (a total of 22 conditions). Each condition is assigned a score of 1, 2, 3, or 6, depending on the risk of dying associated with each one.
Primary Source EvidenceCharlson ME, Pompei P, Ales KL, MacKenzie CR. A new method of classifying prognostic comorbidity in longitudinal studies: development and validation. J Chronic Dis. 1987;40(5):373-383.
Formula Logic
Sum of weights for Age + Comorbidities.

Reference Data

Total ScoreEst. 10-Year Survival
098%
196%
290%
377%
453%
521%
≥ 6< 2%

Clinical Workflow

Use, Interpret, And Continue The Patient Pathway

Expand for workflow guidance, limitations, examples, and related next steps.

When To Use

  • Use Charlson Comorbidity Index when charlson Comorbidity Index estimates 10-year survival by scoring 17 comorbid conditions and age to stratify mortality risk for treatment planning.
  • Confirm that the patient, diagnosis, disease phase, and available inputs match the cited model before calculation.

How To Interpret

  • Interpret the displayed result using the calculator-specific formula and reference table, spanning 0 through ≥ 6.
  • A boundary result should prompt input verification and clinical review rather than false precision.

What To Do Next

  • Integrate the result with diagnosis, disease burden, organ function, frailty, treatment intent, medicines, and patient goals.
  • Document the inputs, result, timing, and clinical context so the assessment can be reproduced.

Limitations

  • General oncology tools measure one domain and should not become a universal treatment-eligibility rule.
  • The result supports clinician judgment and does not independently determine treatment.

Validated Population

patients whose general oncology assessment matches the intended use of the selected score

How to apply this result

For a representative case, verify Age, Myocardial Infarction, Congestive Heart Failure, calculate the result, and confirm that its classification matches the highlighted reference band before continuing the disease-specific pathway.

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Frequently Asked Questions

When should Charlson Comorbidity Index be used?

Use it for patients whose general oncology assessment matches the intended use of the selected score when all required inputs and the intended clinical setting are confirmed.

Can Charlson Comorbidity Index determine treatment by itself?

No. Interpret the result with the cited evidence, complete clinical assessment, current guidelines, and patient-specific goals.

Evidence-based oncology decision support. Verify with clinical guidelines.