Table 1.
Clinicopathologic features and tumor characteristics.
| Characteristic | Number | % | |
|---|---|---|---|
| Age (years) | Mean±SD | 62.8±8.5 | |
| Range | 36–78 | ||
| Sex | Male | 117 | 83.6 |
| Female | 23 | 16.4 | |
| Smoking history | No | 16 | 11.4 |
| Yes | 124 | 88.6 | |
| Tumor location | Upper | 3 | 2.1 |
| Middle | 65 | 46.4 | |
| Lower | 72 | 51.4 | |
| Differentiation | Well | 27 | 19.3 |
| Moderate | 83 | 59.3 | |
| Poor | 30 | 21.4 | |
| pT | T1 | 54 | 38.5 |
| T2 | 12 | 8.6 | |
| T3 | 60 | 42.9 | |
| T4 | 14 | 10.0 | |
| pN | N0 | 63 | 45.0 |
| N1–3 | 77 | 55.0 | |
| pM | M0 | 124 | 88.6 |
| M1 | 16 | 11.4 | |
| TNM staging | I | 28 | 20.0 |
| II | 43 | 30.7 | |
| III–IV | 69 | 49.3 | |
| Lymphatic invasion | Negative | 63 | 45.0 |
| Positive | 77 | 55.0 | |
| Venous invasion | Negative | 48 | 34.3 |
| Positive | 92 | 65.7 |