Table 1.
Summary of four data sets
| Training set | Testing set | External validation set 1 | External validation set 2 | |
|---|---|---|---|---|
|
TCIA—NSCLC radiomics Lung 1 (n = 420) |
TCIA—NSCLC radiogenomics Lung 2 (n = 157) |
TCIA – head-neck-radiomics-HN1 Head & neck (n = 137) |
TCIA – KiTS19 Kidney (n = 191) |
|
| Modality | Lung CT scan | Lung CT scan | Head & Neck CT scan | Abdomen CT scan |
| Slice thickness (mm) | 3 mm | 0.625 to 3 mm | 3 mm | 1 to 5 mm |
| Segmentation algorithm | Manual delineation | Automatic segmentation and reviewed and edited by a thoracic radiologist | Manual delineation | Manual delineation |
| Age (mean SD) | 68.01 (10.08) | 68.97 (9.52) | 61.96 (8.76) | 58.06 (14.25) |
| Gender men (%) | 289 (68.8) | 109 (69.4) | 111 (81.0) | 117 (61.3) |
| Stage (%) | - | |||
| Tis | 0 | 6 ( 3.8) | 0 | 0 |
| I | 92 (22.0) | 104 (66.2) | 24 (17.5) | 128 (67.0) |
| II | 40 ( 9.5) | 22 (14.0) | 11 ( 8.0) | 41 (21.5) |
| IIIa | 111 (26.5) | 16 (10.2) | 23 (16.8) | 2 ( 1.0) |
| IIIb | 176 (42.0) | 5 ( 3.2) | ||
| IVa | 0 | 4 ( 2.5) | 68 (49.6) | 20 (10.5) |
| IVb | 10 ( 7.3) | |||
| IVc | 1 ( 0.7) | |||
| Overall survival time (median (IQR)) (days) | 548.00 (260.25, 1414.25) | 1315.00 (630.00, 1921.00) | 2,778.00 (912.00, 3198.00) | 800.00 (275.00, 1410.50) |