Table 2.
Response assessment 18-fludeoxyglucose (18F-FDG) positron emission tomography (PET)-CT in 105 patients with locally advanced head and neck squamous cell carcinoma after (chemo)radiation
| Scan outcome | Primary site (n = 101) | Neck nodes (n = 93) | Overall (primary and neck) (n = 105) |
|---|---|---|---|
| 18F-FDG PET-CT positive | 19 | 19 | 28 |
| 18F-FDG PET-CT negative | 82 | 74 | 77 |
| True positive | 9 | 10 | 15 |
| True negative | 81 | 73 | 76 |
| False positive | 10 | 9 | 12 |
| False negative | 1 | 1 | 2 |
| Sensitivity (%) | 90 | 91 | 88 |
| Specificity (%) | 89 | 89 | 86 |
| Positive predictive value (%) | 47 | 53 | 56 |
| Negative predictive value (%) | 99 | 99 | 97 |