Table 4. Comparison with published studies.
| Study | Patient number (nodal stage) | Median follow-up (months) | Median time to PET/CT post chemoradiation (months) | Negative predictive value (%) | Positive predictive value (%) |
| This study | 92 (N0–N3) | 19 | 3 (range 2–8) | 91.8 | 54.8 |
| 63 (N2A–3) | 87.9 | 23.8 | |||
| Loo et al7 | 34 (N2A–2C) | 39.1 | 3 | 100 | – |
| Tan et al8 | 48 (N2A–3) | 20 | 2.5 (range 1.1–5.3) | 95 | 20 |
| Yao et al9 | 188 (N2A–3) | 36.2 | 3.8 (range 1.3–10.9) | 99 (neck) | 4371 (neck) |
| 98.7 (primary) | 32.4 (primary) | ||||
| Ong et al10 | 65 (N1–3) | 43 | 3 (range 2–6.75) | 97 | 38 |
| Abgral et al11 | 91 (N0-3) | 11.5 | 11.6 (range 7.2–16) | 100 | 77 |
| Nayak et al12 | 43 (N2A–3) | 18.1 | Within 6 months | 97 | 70 |
| Gupta et al13 | 57 (N0–2B) | 26 | 2.25 (range 1.25–7.25) | 86.7 | 58.3 |
PET, positron emission tomography.