Table 4 Comparison of clinicopathological factors between favorable and unfavorable pathological groups
≤Grade 2 n = 30 | ≥Grade 3 n = 21 | ||
|---|---|---|---|
Disease | |||
Primary | 21 | 17 | p = 0.518 |
Recurrent | 9 | 4 | |
Clinical T classification | |||
cTX-2 | 16 | 10 | p = 0.7793 |
cT3–4 | 14 | 11 | |
Clinical N classification | |||
cN0–1 | 18 | 10 | p = 0.4078 |
cN2a- | 12 | 11 | |
Number of pathological LN metastases | |||
0 | 13 | 10 | p = 0.7828 |
≥ 1 | 17 | 11 | |
≤ 1 | 23 | 13 | p = 0.3514 |
≥ 2 | 7 | 8 | |
Median (range) | 1 (0–10) | 1 (0–5) | p = 0.903 |
Total dose median (range) | 30 (25–36) Gy | 30 (22–36) Gy | p = 0.7271 |
Period from radiotherapy end to surgery | |||
Median (range) | 23 (12–33) days | 20 (8–36) days | p = 0.2051 |
Treatment machine | |||
EXL-15SP | 25 | 18 | p = 1.0 |
Clinac iX | 5 | 3 | |
Radiation field | |||
Unilateral neck | 7 | 5 | p = 1.0 |
Whole neck | 23 | 16 | |
Neck dissection | |||
None/ipsilateral | 18 | 17 | p = 0.14 |
Bilateral | 12 | 4 | |