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Charlson Comorbidity Index (Age-Adjusted)

Written by the Elysia Tools team · Last updated：2026-08-07

This tool is for informational purposes only and does not constitute medical, financial, or legal advice; consult a qualified professional for advice.

Calculate the Charlson Comorbidity Index (CCI), including the age-adjusted variant, to predict 1-year mortality from chronic comorbidities. 19 comorbidities are weighted by mortality risk: 1 point (MI, CHF, PVD, cerebrovascular disease, dementia, chronic pulmonary disease, connective tissue disease, peptic ulcer, mild liver disease, diabetes without complications); 2 points (hemiplegia/paraplegia, moderate-to-severe CKD, diabetes with end-organ damage, any non-metastatic tumor, leukemia, lymphoma); 3 points (moderate-to-severe liver disease); 6 points (metastatic solid tumor, AIDS). Age adjustment adds 1 point per decade ≥50 (50-59 +1 … ≥90 +5). Interpretation: 0 ~8%, 1-2 ~25%, 3-4 ~50%, ≥5 ~80-90% 1-year mortality (derivation cohort). Derived from Charlson 1987 (J Chronic Dis) and the 1994 validation. Not medical advice.

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Tool usage guide

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Key facts

Category
Health
Input types
number, checkbox
Output type
json
Sample coverage
4
API ready
Yes

Overview

The age-adjusted Charlson Comorbidity Index calculator estimates a CCI score from age and selected chronic conditions. It assigns weighted points to 19 comorbidities, adds age points from 50 onward, and provides an interpretation linked to 1-year mortality estimates from the derivation cohort. It is not medical advice.

When to use

  • Estimate comorbidity burden when age and relevant chronic conditions are known.

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  • Support clinical research, risk stratification, or documentation using a standardized CCI score.
  • Compare how different combinations of chronic disease and age affect the total index.

    • How it works

    1. 1Enter the person's age in years.
    2. 2Select each applicable condition, such as heart failure, chronic pulmonary disease, CKD, diabetes, or cancer.
    3. 3The calculator adds the assigned points for each selected comorbidity and applies age adjustment: 1 point per decade from age 50 onward, up to 5 points.
    4. 4The JSON result reports the total Charlson score and its corresponding interpretation.

    Use cases

    • Clinical research teams standardizing comorbidity measurements across study participants.
    • Healthcare professionals documenting chronic disease burden for risk stratification.
    • Analysts comparing age and comorbidity profiles in population or outcomes studies.

    Examples

    1. Older adult with metastatic cancer and prior myocardial infarction

    Clinical researcher

    Background

    A 75-year-old participant has a history of myocardial infarction, diabetes without complications, and metastatic solid tumor.

    Problem

    Calculate the age-adjusted Charlson score and review the associated mortality category.

    How to use

    Enter age 75 and select Myocardial infarction, Diabetes without complications, and Metastatic solid tumor.

    Age: 75; Myocardial infarction: selected; Diabetes without complications: selected; Metastatic solid tumor: selected; all other conditions: not selected.

    Outcome

    The total is 11: age contributes 3 points, myocardial infarction 1, diabetes without complications 1, and metastatic solid tumor 6. The result is classified as very high, with an approximately 80-90% 1-year mortality estimate in the derivation cohort.

    2. Younger adult with chronic pulmonary disease

    Research analyst

    Background

    A 45-year-old participant has chronic pulmonary disease but no other selected Charlson conditions.

    Problem

    Determine the comorbidity score without an age adjustment.

    How to use

    Enter age 45 and select Chronic pulmonary disease.

    Age: 45; Chronic pulmonary disease: selected; all other conditions: not selected.

    Outcome

    The total is 1. Age contributes 0 points because the participant is younger than 50, and chronic pulmonary disease contributes 1 point.

    FAQ

    What does the Charlson Comorbidity Index measure?

    It summarizes chronic comorbidity burden and provides an associated 1-year mortality estimate based on the original derivation cohort.

    How is age included in the score?

    Age adds 1 point for each decade beginning at 50: 50-59 adds 1 point, 60-69 adds 2, and 90 or older adds 5.

    Which conditions receive the highest weights?

    Metastatic solid tumor and AIDS each receive 6 points. Moderate-to-severe liver disease receives 3 points.

    What do the score ranges mean?

    In the derivation cohort, scores of 0, 1-2, 3-4, and 5 or higher corresponded to approximately 8%, 25%, 50%, and 80-90% 1-year mortality, respectively.

    Is this calculator medical advice?

    No. The result is an estimate for reference and should not replace professional clinical judgment or patient-specific assessment.

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