Table 4. Operative methods and curability.
| Factor | Subgroup | 2004 | 2009 | 2014 | 2019 | |
|---|---|---|---|---|---|---|
| Approach | Open | 9,129 (80.8) | 10,672 (72.8) | 7,760 (49.8) | 3,853 (27.6) | |
| Laparoscopy | 740 (6.6) | 3,783 (25.8) | 7,493 (48.1) | 9,052 (64.9) | ||
| Assisted | NA | NA | 2,805 (18.0) | 1,369 (9.8) | ||
| Totally | NA | NA | 4,688 (30.1) | 7,683 (55.1) | ||
| Robot | NA | NA | 325 (2.1) | 787 (5.6) | ||
| Others* | NA | 176 (1.2) | 1 (<0.1) | 258 (1.8) | ||
| Operation type | DG | 7,959 (70.5) | 10,375 (70.8) | 10,808 (69.2) | 10,091 (71.7) | |
| TG | 2,645 (23.4) | 3,348 (23.3) | 3,659 (23.4) | 2,855 (20.3) | ||
| NTG | NA | 105 (0.7) | 119 (0.8) | NA | ||
| PG | 119 (1.1) | 141 (1.0) | 168 (1.1) | 365 (2.6) | ||
| PPG | 29 (0.3) | 86 (0.6) | 233 (1.5) | 242 (1.7) | ||
| Segmental resection | NA | NA | 10 (0.1) | NA | ||
| Wedge resection | 38 (0.3) | 51 (0.3) | 58 (0.4) | 37 (0.3) | ||
| Bypass | 170 (1.5) | 196 (1.3) | 163 (1.0) | 157 (1.1) | ||
| Biopsy or exploration only | 243 (2.2) | 251 (1.7) | 300 (1.9) | 239 (1.7) | ||
| Others | NA | 105 (0.7) | 75 (0.6) | 86 (0.6) | ||
| Combined resection† | No | 14,176 (92.6) | 12,495 (90.6) | |||
| Yes | 1,139 (7.4) | 1,299 (9.4) | ||||
| Lymph node dissection | Not done | 336 (2.4) | ||||
| <D1 | 83 (0.6) | |||||
| D1 | 210 (1.5) | |||||
| D1+ | 4,961 (36.1) | |||||
| D2 | 7,781 (56.7) | |||||
| >D2 | 357 (2.6) | |||||
| Curability | R0 | 10,068 (81.9) | 13,537 (92.4) | 14,043 (89.9) | 13,115 (93.2) | |
| R1 | 174 (1.4) | 291 (2.0) | 223 (1.4) | 127 (0.9) | ||
| R2 | 364 (3.0) | 257 (1.8) | 349 (2.2) | 171 (1.2) | ||
| No resection | 384 (3.1) | 513 (3.5) | 286 (1.8) | 455 (3.2) | ||
| NA | 303 (2.5) | 60 (0.4) | 712 (4.6) | 208 (1.5) | ||
Values are presented as number (%).
DG = distal gastrectomy; TG = total gastrectomy; NTG = near total gastrectomy; PG = proximal gastrectomy; PPG = pylorus-preserving gastrectomy; NA = not available (items were not included in the survey).
*Others refer to laparoscopic or open exploration without gastrectomy, such as open or closed; †Combined resection was initially evaluated in the 2014 survey.