Diagnostic Values of Contrast-Enhanced CT (CT) and PET/CT for Cervical Metastasis in Patients with High-Grade Salivary Cancer on a Level-by-Level Analysis (n = 86 Node Levels)
| CT | PET/CT | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Parameter | TP | TN | FP | FN | TP | TN | FP | FN | P* |
| Neck node levels | |||||||||
| I | 4 | 14 | 1 | 1 | 5 | 15 | — | — | |
| II | 5 | 11 | 2 | 3 | 8 | 13 | — | — | |
| III | 4 | 10 | — | 1 | 5 | 10 | — | — | |
| IV | 2 | 7 | — | 2 | 4 | 6 | 1 | — | |
| V | 4 | 6 | — | 1 | 5 | 5 | 1 | — | |
| VI | — | 1 | — | 1 | 1 | 1 | — | — | |
| Others† | 4 | 2 | — | — | 4 | 2 | — | — | |
| Total | 23 | 51 | 3 | 9 | 32 | 52 | 2 | — | |
| Diagnostic values | |||||||||
| Sensitivity (%) | 71.8 (62.5–80.2)‡ | 100.0 (95.7–100.0) | 0.003 | ||||||
| Specificity (%) | 94.4 (87.3–97.6) | 96.3 (89.9–98.6) | NS | ||||||
| PPV (%) | 88.4 (79.9–93.5) | 94.1 (86.9–97.4) | NS | ||||||
| NPV (%) | 85.0 (75.9–91.0) | 100.0 (95.7–100.0) | 0.01 | ||||||
| Diagnostic accuracy (%) | 86.0 (77.1–91.7) | 97.6 (91.8–99.3) | 0.01 | ||||||