Table 2. Details of treatment and surgical short-term outcomes between different countries.
| China (N = 1365)† | Korea (N = 4981)† | P value | |
|---|---|---|---|
| Surgical methods | < 0.001 | ||
| Open surgery | 1176 (86.2) | 3773 (75.8) | |
| Laparoscopic surgery | 189 (13.9) | 779 (15.6) | |
| Robotic surgery | 0 (0) | 429 (8.6) | |
| Resection type | < 0.001 | ||
| Distal gastrectomy | 793 (58.1) | 3660 (73.5) | |
| Proximal gastrectomy | 230 (16.9) | 0 (0) | |
| Total gastrectomy | 342 (25.1) | 1321 (26.5) | |
| Lymphadenectomy | 0.004 | ||
| D1/D1+ | 689 (50.5) | 2294 (46.1) | |
| D2/D2+* | 676 (49.5) | 2687 (53.9) | |
| Radicality of surgery | < 0.001 | ||
| R0 | 1239 (90.8) | 4780 (96.0) | |
| R1/R2 | 126 (9.2) | 201 (4.0) | |
| Reconstructions | 0.000 | ||
| Billroth-1 | 192 (14.07%) | 1853 (37.20%) | |
| Billroth-2 | 589 (43.15%) | 1792 (35.98%) | |
| Roux-en-Y | 354 (25.93%) | 1336 (26.82%) | |
| Esophagogastric anastomosis | 230 (16.85%) | 0 (0%) | |
| No. of total harvested lymph nodes | 27.22 ± 13.01 | 40.12 ± 16.03 | < 0.001 |
| No. of total harvested lymph nodes in D2 subgroup | 30.00 ± 12.90 | 43.42 ± 16.43 | < 0.001 |
| No. of lymph nodes with positive metastasis | 6.43 ± 8.39 | 3.07 ± 7.42 | < 0.001 |
| Postoperative hospital stays (day) | 11.41 ± 7.75 | 9. 79 ± 9.36 | 0.000 |
| Estimated blood loss (mL) (4909 patients for analysis) | 172.00 ± 154.71 | 120.27 ± 192.66 | 0.000 |
| Operation time (min) (5806 patients for analysis) | 242.34 ± 54.38 | 169.16 ± 57.49 | 0.000 |
| Number of patients with postoperative morbidity | 200 (14.7) | 708 (14.2) | 0.682 |
| Clavien-Dindo classification of postoperative morbidity | 0.166 | ||
| I | 62 (4.5) | 222 (4.5) | |
| II | 75 (5.5) | 240 (4.8) | |
| IIIa | 42 (3.1) | 156 (3.1) | |
| IIIb | 10 (0.7) | 70 (1.4) | |
| IVa | 3 (0.2) | 3 (0.1) | |
| IVb | 2 (0.1) | 5 (0.1) | |
| V | 6 (0.4) | 12 (0.2) | |
| Mortality | 6 (0.4) | 12 (0.2) | 0.221 |
| Chemotherapy | < 0.001 | ||
| No chemotherapy | 764 (56.0) | 3411 (68.5) | |
| Neo-adjuvant chemotherapy | 12 (0.9) | 87 (1.7) | |
| Adjuvant chemotherapy | 575 (42.1) | 1408 (28.3) | |
| Unclear | 14 (1.0) | 75 (1.5) |
*
D2 included No.14v lymph nodes dissection.
†
Frequency (percentage).