Table 4 Comparison of CT features between the training group and the validation group
CT features | Â | training group | validation group | P |
|---|---|---|---|---|
| Â | 555 | 193 | ||
maximum diameter(cm) |  | 1.08 ± 0.34 | 1.03 ± 0.33 | 0.077 |
CTR(%) |  | 25.98 ± 26.00 | 27.08 ± 25.39 | 0.612 |
maximum CT value(HU) |  | 183 ± 209.15 | 185.81 ± 202.81 | 0.904 |
mean CT value(HU) |  | 466.13 ± 146.13 | 449.69 ± 122.85 | 0.162 |
spiculation sign(%) | No | 373 (67.2) | 122 (63.2) | 0.312 |
| Â | Yes | 182 (32.8) | 71 (36.8) | Â |
Pleura traction sign(%) | No | 454 (81.8) | 162 (83.9) | 0.503 |
| Â | Yes | 101 (18.2) | 31 (16.1) | Â |
vascular convergence sign(%) | No | 342 (61.6) | 117 (60.6) | 0.806 |
| Â | Yes | 213 (38.4) | 76 (39.4) | Â |
Air Bronchogram Sign(%) | No | 532 (95.9) | 187 (96.9) | 0.521 |
| Â | Yes | 23 (4.1) | 6 (3.1) | Â |
lobulation sign(%) | No | 461 (83.1) | 161 (83.4) | 0.909 |
| Â | Yes | 94 (16.9) | 32 (16.6) | Â |
Vacuole Sign(%) | No | 393 (70.8) | 147 (76.2) | 0.153 |
| Â | Yes | 162 (29.2) | 46 (23.8) | Â |