CARG Chemotherapy Toxicity Score: Clinical Guide

Overview

Estimates grade 3–5 chemotherapy toxicity risk in adults aged 65 years or older.

Clinical Significance

Scores 0–5 are low risk, 6–9 intermediate risk and 10–19 high risk for grade 3–5 toxicity in the derivation model.

When to Use

• Use as structured clinical decision support when the required data are available and reliable.

How It Is Calculated

• The displayed variables are combined using the published equation or weighted point system.

Interpretation

• Scores 0–5 are low risk, 6–9 intermediate risk and 10–19 high risk for grade 3–5 toxicity in the derivation model.

Worked Example

Enter verified patient data in the displayed units; MedicalC applies the published equation or point system.

Limitations

• Classification and prognostic tools can be misapplied outside their validated population.
• Missing, estimated or non-contemporaneous data may materially change the result.

Clinical Pearls

• Document the input values, units, date and clinical setting with the result.
• Use serial scores only when the same instrument and measurement method are used consistently.

Common Mistakes

• Using the tool without confirming entry criteria.
• Selecting overlapping findings that should be represented by the highest-scoring item only.
• Treating a classification threshold as a standalone diagnosis.

References

1. Hurria A et al. J Clin Oncol. 2011;29:3457-3465. — Primary or supporting reference for the implemented model.