Table 2.
Comparison of the discriminating performance of the Rad score clinical nomogram and radiomics nomograms built by incorporating clinical risk factors and Rad score calculated from different MRI sequences.
| Model | Training cohort | Validation cohort | ||
|---|---|---|---|---|
| C-index | 95% CI | C-index | 95% CI | |
| Rad score-T1 | 0.626 | 0.602–0.650 | 0.599 | 0.562–0.636 |
| Rad score-T1C | 0.592 | 0.568–0.616 | 0.613 | 0.578–0.648 |
| Rad score-T2 | 0.656 | 0.631–0.681 | 0.575 | 0.536–0.614 |
| Rad score-MS | 0.731 | 0.709–0.753 | 0.807 | 0.782–0.832 |
| Clinical nomogram | 0.766 | 0.744–0.788 | 0.743 | 0.724–0.762 |
| Radiomics nomogram-T1 | 0.789 | 0.768–0.810 | 0.795 | 0.781–0.809 |
| Radiomics nomogram-T1C | 0.795 | 0.775–0.815 | 0.769 | 0.736–0.802 |
| Radiomics nomogram-T2 | 0.800 | 0.780–0.820 | 0.784 | 0.756–0.812 |
| Radiomics nomogram-MS | 0.827 | 0.809–0.845 | 0.836 | 0.815–0.857 |