Table 1.
Patient characteristics
| Characteristic | No. (%) |
|---|---|
| Age, median (range, yr) | 52.5 (28–79) |
| Sex | |
| Male | 43 (71.7) |
| Female | 17 (28.3) |
| ECOG PS | |
| 0–1 | 48 (80.0) |
| 2 | 12 (20.0) |
| WHO histologic type at initial diagnosis | |
| Keratinizing squamous cell carcinoma | 18 (30.0) |
| Non-keratinizing carcinoma | 42 (70.0) |
| Initial T category | |
| iT1–2 | 32 (53.3) |
| iT3–4 | 28 (46.7) |
| Initial N category | |
| iT0–1 | 30 (50.0) |
| iT2–3 | 30 (50.0) |
| Recurrent T category | |
| rT1–2 | 31 (51.7) |
| rT3–4 | 29 (48.3) |
| Recurrent N category | |
| rN0–1 | 56 (93.3) |
| rN2–3 | 4 (6.7) |
| Interval from initial RT to re-RT, median (range, mo) | 26.5 (3–155) |
All patients were retrospectively re-staged according to the 7th American Joint Committee on Cancer Staging Classification. ECOG PS, Eastern Cooperative Oncology Group performance status; RT, radiation therapy; WHO, World Health Organization.