Table 4.
Performance of models.
| Model | C-index (95%CI) | BIC | Log likelihood | P-value | |
|---|---|---|---|---|---|
| Training cohort | Validation cohort | ||||
| Radiomics signature | 0.714 (0.63–0.80) | 0.632 (0.52–0.74) | 521.80 | −258.97 | <0.0001 a |
| Clinicopathological nomogram | 0.771 (0.69–0.85) | 0.761 (0.66–0.86) | 511.42 | −247.97 | <0.001 b |
| Radiomics nomogram | 0.801 (0.72–0.88) | 0.796 (0.70–0.89) | 502.75 | −241.70 | / |
a
The likelihood ratio test was performed between the radiomics signature and the radiomics nomogram.
b
The likelihood ratio test was performed between the clinicopathological nomogram and the radiomics nomogram.
C-index, concordance index; CI, confidence interval.