Table 3. Accuracy of CT diagnosis.
| CT features | Sensitivity | Specificity | PPV | NPV | Accuracy | Kappa value |
|---|---|---|---|---|---|---|
| Infiltration of surrounding fat | 92.5% (62/67) | 49.3% (35/71) | 63.3% (62/98) | 87.5% (35/40) | 70.3% (97/138) | 0.413 |
| Invasion of mediastinal pleura | 94.1% (32/34) | 56.7% (59/104) | 41.6% (32/77) | 96.7% (59/61) | 65.9% (91/138) | 0.357 |
| Invasion of the lung | 92.0% (23/25) | 76.2% (99/113) | 62.2% (23/37) | 98.0% (99/101) | 88.4% (122/138) | 0.671 |
| Invasion of pericardium | 69.0% (20/29) | 88.1% (96/109) | 60.6% (20/33) | 91.4% (96/105) | 84.1% (116/138) | 0.543 |
| Invasion of the great vessels | 85.7% (18/21) | 97.3% (110/117) | 72.0% (18/25) | 97.3% (110/113) | 92.8% (128/138) | 0.74 |
| Invasion of the phrenic nerve | 76.9% (10/13) | 95.2% (119/125) | 62.5% (10/16) | 97.5% (119/122) | 93.5% (129/138) | 0.654 |
| Presence of pleural effusion | 50.0% (3/6) | 95.7% (127/132) | 37.5% (3/8) | 97.7% (127/130) | 94.2% (130/138) | 0.138 |
| Pleura and/or pulmonary metastases | 62.5% (5/8) | 100% (130/130) | 100% (5/5) | 0 (0/130) | 97.8% (135/138) | None |
| Mediastinal lymph node enlargement | 20.0% (1/5) | 99.2% (132/133) | 50.0% (1/2) | 97.1% (132/136) | 96.4% (134/138) | 0.271 |