Clinical calculator summary
Original age-adjusted Charlson Comorbidity Index
Clinical calculator summary
Original age-adjusted Charlson Comorbidity Index
The original 1987 weighted comorbidity subtotal plus the capped 1994 age contribution.
Evidence-based context for fast calculator use
- Purpose:
- Quantify baseline adult comorbidity burden without converting the result into an unsupported absolute survival probability.
- Population:
- Adults assessed at baseline in contexts resembling the original historical cohorts.
- Factors:
- Sixteen source-defined comorbidity categories, Three mutually exclusive severity hierarchies, Age contribution capped at four points
- Reference:
- Charlson et al. J Chronic Dis. 1987;40:373-383; Charlson et al. J Clin Epidemiol. 1994;47:1245-1251.
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Charlson Comorbidity Index
years
Used only for the separate 1994 age contribution; enter completed adult years.
Clinical Context & Background
This calculator reproduces the original 1987 Charlson comorbidity weights and the 1994 combined age-comorbidity extension. The 16 semantic comorbidity fields produce a subtotal from 0 to 33; age contributes 0 to 4 capped points, producing a combined score from 0 to 37.
Hierarchical diabetes, liver-disease, and solid-tumor categories use only the highest applicable weight. AIDS means clinically defined AIDS rather than asymptomatic HIV infection. Nonmetastatic solid tumor contributes 2 points only when diagnosed within the preceding five years; metastatic solid tumor contributes 6 points.
The combined score is a historical comorbidity-burden index, not an individualized absolute survival estimate or treatment recommendation. The unsupported 10-year survival conversion previously shown on this page has been removed.
Formula Logic
Age-adjusted Charlson score = original 1987 comorbidity subtotal + 1994 age points. Age contributes 0 (<50), 1 (50-59), 2 (60-69), 3 (70-79), or 4 (>=80); the age contribution is capped at 4.Reference Data
| Component | Source-defined category | Points |
|---|---|---|
| Age | <50; 50-59; 60-69; 70-79; >=80 | 0; 1; 2; 3; 4 (capped) |
| Weight-1 conditions | MI, CHF, PVD, cerebrovascular disease, dementia, chronic pulmonary disease, connective-tissue disease, peptic ulcer | 1 each |
| Diabetes | None; uncomplicated; end-organ damage | 0; 1; 2 |
| Liver disease | None; mild; moderate/severe | 0; 1; 3 |
| Weight-2 conditions | Hemiplegia/paraplegia, moderate/severe renal disease, leukemia, lymphoma | 2 each |
| Solid tumor | None/>5 years; nonmetastatic within 5 years; metastatic | 0; 2; 6 |
| AIDS | Absent; present | 0; 6 |
Clinical Workflow
Use, Interpret, And Continue The Patient Pathway
Expand for workflow guidance, limitations, examples, and related next steps.
Clinical Workflow
Use, Interpret, And Continue The Patient Pathway
Expand for workflow guidance, limitations, examples, and related next steps.
When To Use
- Use for baseline adult comorbidity-burden description.
- Apply the original clinical definitions and the five-year nonmetastatic solid-tumor window.
How To Interpret
- Review the 0-33 comorbidity subtotal separately from the 0-4 age points.
- The combined 0-37 score is a historical index; no absolute survival probability is calculated.
What To Do Next
- Integrate comorbidity burden with diagnosis, function, frailty, patient goals, and treatment-specific assessment.
- Use disease- and treatment-specific tools when those questions are being addressed.
Limitations
- Not an individualized survival calculator, eligibility rule, or treatment recommendation.
- Original cohorts and historical associations may not represent contemporary outcomes.
- Not for post-treatment reassessment; does not capture all severity or functional effects.
Validated Population
Historical adult medical, breast-cancer, and elective-surgery cohorts used in the original 1987 and 1994 studies.
Calculation verification history
Verified
Calculation verification history
Verified: Production browser revalidation
- Three source-backed cases passed through all seventeen visible production controls at age 49, exact age-50 transition, and the maximum comorbidity profile at age 80.
- The results matched subtotal/age/combined scores 0/0/0, 0/1/1, and 33/4/37 while retaining hierarchical categories and no absolute survival probability.
- No unexpected N/A, stale control, literal undefined/null value, or browser-console error was observed.
Case-level evidence is retained in validation/browser-revalidation/charlson-comorbidity-index-2026-08-03.json.
: Production browser validation
- Ten source-backed cases were exercised on the public production route through visible browser controls; 10/10 case records passed their expected-versus-observed assertions across 11 visible submissions.
- Overall browser status: failed-console. medium: Production emitted minified React error #418 during route loads/reloads used by this run.
- Case-level inputs, expected and observed results, reset/repeat behavior, failure reproductions, and console evidence are retained in the production-browser evidence record.
Case-level production evidence is retained in validation/browser-production/charlson-comorbidity-index.json.
: Full validation test
- 1024/1024 source-weight, age-boundary, hierarchy, strict-input, UI/reset, trace, wording, immutability, registry, and no-panel-reuse checks passed with zero score mismatches.
- Scope is the original 1987 CCI plus 1994 age extension; no panel reuses this engine or inherits verification status.
: Calculation and input-contract correction
- Replaced favorable point-coded defaults and permissive Number/Object.values summation with 17 mandatory semantic fields, exact-key validation, and rejection of coercive, malformed, missing, extra, and nonfinite values.
- Enforced the diabetes, liver-disease, and solid-tumor hierarchies; defined AIDS and the five-year nonmetastatic-tumor window; preserved the capped age bands and maximum combined score of 37.
- Removed unsupported absolute 10-year survival outputs and added separate comorbidity subtotal, age contribution, combined total, and cautious historical relative-risk context.
Verification confirms the calculator implementation against the cited model; it is not independent clinical validation, regulatory approval, or medical advice.
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.