Table 3.
The C-index values of the models in the training and test sets
| Data Set | pTNM | EORC-ClinPath | EORC-Radiom | EORC-ClinRadiom | EORC-ClinPathRadiom |
|---|---|---|---|---|---|
| Training set | 0.69 [0.62-0.76]a,b | 0.71 [0.62-0.79]a,b | 0.71 [0.64-0.79]a,b | 0.77 [0.70-0.85]b | 0.82 [0.75-0.88] |
| Internal test set | 0.63 [0.50-0.76]a,b | 0.75 [0.63-0.87]a,b | 0.71 [0.61-0.82]a,b | 0.81 [0.71-0.92] | 0.82 [0.74-0.91] |
| External test set | 0.61 [0.38-0.84]a,b | 0.72 [0.49-0.95] | 0.71 [0.54-0.89]b | 0.77 [0.60-0.94] | 0.81 [0.63-0.99] |
Data in the brackets are 95% CI.
C-index, concordance index; CI, confidence interval; EORC, early-onset rectal cancer; pTNM, pathological TNM stage.
a
The EORC-ClinRadiom model outperformed the corresponding model (P < 0.05 and considered statistically significant).
b
The EORC-ClinPathRadiom model outperformed the corresponding model (P value <0.05 and considered statistically significant).