Table 1. Clinicopathological characteristics of the patients included in this study.
| Patient Characteristics | No. | % |
|---|---|---|
| Total | 170(male, M0 c) | 100 |
| Min follow-up time (month) | 3 | - |
| Max follow-up time (month) | 122 | - |
| Median follow-up time (month) | 38 | - |
| Survival status | 70 survivors | 41.2 |
| 100 dead | 58.8 | |
| Mean Age | 60.75 | |
| Range | 32-82 | |
| <60 | 80 | 47.1 |
| ≥60 | 90 | 52.9 |
| Tumor Stage a | ||
| T1 | 40 | 23.5 |
| T2 | 62 | 36.5 |
| T3 | 50 | 29.4 |
| T4 | 18 | 10.6 |
| N0 | 116 | 68.2 |
| N1 | 30 | 17.6 |
| N2 | 24 | 14.1 |
| Clinical Stage b | ||
| I | 37 | 21.8 |
| II | 36 | 21.2 |
| III | 61 | 35.9 |
| IV | 36 | 21.2 |
| Differentiation degree | ||
| Low | 14 | 8.2 |
| Moderate | 125 | 73.5 |
| High | 31 | 18.2 |
| Merged Surgical Procedures | ||
| Neck Dissection | 37 | 21.8 |
| Non-Neck Dissection | 133 | 78.2 |
a: T-stage: tumor stage; N-stage: lymph node stage
b: Clinical stage reference: international unifying new TNM classification from Union for International Cancer Control
c: M0: No distant metastasis;