Table 1.
Patient and treatment characteristics
| Characteristics | Post-RT Asymptomatic Group | Post-RT Symptomatic Group | ||
|---|---|---|---|---|
| Age (years) | 61.1 ± 9.6 | 56.8 ± 7.8 | ||
|
| ||||
| Gender | Male | 9 | 12 | |
| Female | 2 | 5 | ||
|
| ||||
| Primary tumor site | Oropharynx/Nasopharynx | 1 | 2 | |
| Larynx | 1 | 3 | ||
| Oral cavity | 4 | 9 | ||
| Tonsil | 3 | 2 | ||
| Salivary gland | 2 | 1 | ||
|
| ||||
| Histology | Squamous cell carcinoma | 8 | 17 | |
| Adenocarcinoma | 2 | 0 | ||
| Mucoepidermoid carcinoma | 1 | 0 | ||
|
| ||||
| TNM stage | T stage | T1 | 1 | 3 |
| T2 | 4 | 2 | ||
| T3 | 1 | 2 | ||
| T4 | 5 | 7 | ||
| Tx | 0 | 3 | ||
|
| ||||
| N stage | N0 | 4 | 3 | |
| N1 | 0 | 1 | ||
| N2 | 6 | 8 | ||
| N3 | 1 | 4 | ||
| Nx | 0 | 1 | ||
|
| ||||
| M stage | MX | 3 | 0 | |
| M0 | 8 | 17 | ||
|
| ||||
| Mean dose to the neck (Gy) | Right | 59.8 ± 3.0 | 61.1 ± 2.5 | |
| Left | 59.3 ± 3.1 | 59.2 ± 2.9 | ||
|
| ||||
| Follow-up time (months) | 21.8 ± 7.9 | 19.7 ± 8.9 | ||