Table 3.
Model performance and evaluation
| Goodness of fit | Discrimination | Corrected performance | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Model | Nagelkerke R2 | AIC | Brier Score | ACC | SPE | SEN | PPV | NPV | AUC | Internal validated AUC |
| Radiomics | 0.4581 | 234.13 | 0.151 | 67.5 | 61.3 | 87.8 | 41.0 | 94.2 | 0.772 | 0.771 |
| Clinical model | 0.0443 | 195.38 | 0 | 76.1 | 76.9 | 77.6 | 49.4 | 91.7 | 0.795 | 0.770 |
| Combined model | 0.8609 | 185.02 | 0.122 | 81.8 | 86.9 | 75.5 | 58.5 | 92.4 | 0.861 | 0.844 |
Curve Internal validation was performed with 1000-replicate bootstrapping on the primary cohort
AIC, Akaike information criterion; ACC, accuracy; SPE, specificity; SEN, sensitivity; PPV, positive predictive value; NPV, negative predictive value; AUC, area under receiver operating characteristic