TABLE 1.
Patient demographics
| Variable | Value |
|---|---|
| Age (years) | 62.73 ± 7.97 |
| Sex, male (n, %) | 287 (90.8%) |
| Location (n, %) | |
| Upper | 21 (6.6%) |
| Mid | 169 (53.5%) |
| Lower | 126 (39.9%) |
| Tumor differentiation (n, %) | |
| Well differentiated (G1) | 43 (13.6%) |
| Moderately differentiated (G2) | 179 (56.7%) |
| Poorly differentiated (G3) | 94 (29.7%) |
| Neoadjuvant treatment (n, %) | 70 (22.2%) |
| Three‐field dissection (n, %) | 20 (6.3%) |
| R0 resection (n, %) | 306 (96.8%) |
| Number of total dissected lymph nodes (n) | 48.93 ± 26.89 |
| Depth of invasion (T stage) (n, %) | |
| 0 and 1 | 216 (68.4%) |
| 2 | 33 (10.4%) |
| 3 | 64 (20.3%) |
| 4 | 3 (0.9%) |
| Nodal stage (n, %) | |
| 0 | 194 (61.4%) |
| 1 | 66 (20.9%) |
| 2 | 45 (14.2%) |
| 3 | 11 (3.5%) |
| Pathological stage (n, %) | |
| 0 and I | 164 (51.8%) |
| II | 83 (26.3%) |
| III | 69 (21.9%) |
| Perineural invasion (n, %) | 25 (7.9%) |
Note: Data are shown as either mean ± standard deviation, or as n (%).