Table 1. Patients’ baseline characteristics before chemoradiotherapy or radiotherapy (n = 37).
| Median age (range), years | 66 (50 – 84) |
| Sex | |
| Male | 36 |
| Female | 1 |
| HNC | |
| Negative | 25 |
| Positive | 12 |
| Location | |
| Cervical | 1 |
| Upper thoracic | 3 |
| Middle thoracic | 17 |
| Lower thoracic | 12 |
| Upper-middle thoracic | 1 |
| Middle-lower thoracic | 1 |
| Cervical-lower thoracic | 1 |
| Upper thoracic + lower thoracic | 1 |
| Primary tumor | |
| cT1 | 28 |
| cT2 | 1 |
| cT3 | 3 |
| cT4 | 5 |
| Regional lymph nodes | |
| cN0 | 24 |
| cN1 | 9 |
| cN2 | 4 |
| cN3 | 0 |
| Distant metastasis | |
| cM0 | 35 |
| cM1 | 2 |
| Clinical stage | |
| cStage I | 23 |
| cStage II | 3 |
| cStage III | 9 |
| cStage IV | 2 |
HNC, previous or recently discovered concurrent head and neck cancers.