How this model should be used:
This risk stratification schema establishes the risk of chemotherapy toxicity in older adults.
Overall model performance:
Upon internal validation in the original study population (N=500), discriminative power of the model was reasonable to good with an area under the ROC curve (c-index) of 0.72 (95% CI: 0.68 to 0.77).1 In an external validation (N=250) performed by the same research group, a c-index of 0.65 (95% CI: 0.58 to 0.71) was reported.2
Model performance versus KPS:
Physician-rated Karnofsky Performance Score (KPS) was not predictive of chemotherapy toxicity (Figure 1)in either the development cohort (P=0.19) or the validation cohort (P=0.25), with correponding c-indices of 0.54 and 0.53, respectively.
Sources:
1 Hurria A, Togawa K, Mohile SG, et al. Predicting chemotherapy toxicity in older adults with cancer: a prospective multicenter study. J Clin Oncol. 2011;29(25):3457-65.
2 Hurria A, Mohile S, Gajra A, et al. Validation of a Prediction Tool for Chemotherapy Toxicity in Older Adults With Cancer. J Clin Oncol. pii: JCO654327.
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