TABLE 5.
Pathological Features
| With ESSQS(n = 2644), n (%) | Without ESSQS(n = 544), n (%) | P | ||
|---|---|---|---|---|
| Pathological T factor | 0 | 2 (0.08) | 0 | 0.88 |
| 1 | 93 (4) | 16 (3) | ||
| 2 | 439 (17) | 92 (17) | ||
| 3 | 1743 (66) | 355 (65) | ||
| 4a | 240 (9) | 55 (10) | ||
| 4b | 73 (3) | 17 (3) | ||
| pCR | 54 (2) | 9 (2) | ||
| Pathological N factor | 0 | 1402 (53) | 272 (50) | 0.1 |
| 1 | 814 (31) | 193 (35) | ||
| 2 | 324 (12) | 65 (12) | ||
| 3 | 104 (4) | 14 (3) | ||
| Pathological Stage | 0 | 2 (0.08) | 0 | 0.68 |
| I | 332 (13) | 67 (12) | ||
| II | 1015 (38) | 196 (36) | ||
| III | 1225 (46) | 270 (50) | ||
| IV | 18 (0.7) | 2 (0.4) | ||
| pCR | 52 (2) | 9 (2) | ||
| Tumor size (mm) | 44.2 (18.8) | 44.7 (17.8) | 0.61 | |
| Lymph vessel invasion* | 1421 (54) | 349 (64) | <0.001 | |
| Venous vessel invasion* | 1813 (69) | 370 (68) | 0.71 | |
| Differentiated adenocarcinoma* | 2483 (94) | 522 (96) | 0.17 | |
| Adjuvant chemotherapy* | 1195 (45) | 237 (44) | 0.22 |
The values with
* include missing data.
ESSQS, intervention by surgeons qualified by the Endoscopic Surgical Skill Qualification System.