Patient and tumor characteristics
| Characteristics | No. of Patients | % |
|---|---|---|
| Age (yr) (mean) (range) | 51 (33–80) | |
| Sex | ||
| Male | 38 | 83 |
| Female | 8 | 17 |
| Neck dissection procedure | ||
| SOHND | 33 | 72 |
| MRND | 13 | 28 |
| Bilateral MRND | 1 | 2 |
| Pathologic T stage | ||
| T1–2 | 33 | 72 |
| T3–4 | 13 | 28 |
| Pathologic N stage | ||
| N0 | 32 | 70 |
| N1–3 | 14 | 30 |
| Pathologic differentiation | ||
| Well | 15 | 33 |
| Moderate | 27 | 59 |
| Poor | 4 | 9 |
| Pathologic ECS | ||
| Present | 10 | 22 |
| Absent | 36 | 78 |
| Postoperative treatment | ||
| RT | 7 | 15 |
| CCRT | 18 | 39 |
Note:—SOHND indicates supraomohyoid neck dissection; MRND, modified radial neck dissection; ECS, extracapsular spread; RT, radiotherapy; CCRT, concurrent chemoradiotherapy.