Table 1.
Baseline characteristics of gastric tumors n (%)
| Characteristic | Value |
| Gender (female:male) | 1:2.18 (454:989) |
| Age, yr, mean ± SD | 63.0 ± 9.4 |
| Tumor size, mm | |
| < 20 | 1034 (71.7) |
| ≥ 20 | 409 (28.3) |
| Macroscopic appearance | |
| Elevated | 310 (21.5) |
| Flat | 128 (8.9) |
| Depressed | 90 (6.2) |
| Mixed | 915 (63.4) |
| Ulcer | 71 (4.9) |
| Invasion depth | |
| Mucosa | 612 (42.4) |
| Submucosa | 106 (7.3) |
| LocationI | |
| Lower third | 1233 (85.4) |
| Middle third | 112 (7.8) |
| Upper third | 98 (6.8) |
| Location II | |
| Anterior wall | 294 (20.4) |
| Lesser curvature | 481 (33.3) |
| Posterior wall | 405 (28.1) |
| Greater curvature | 263 (18.2) |
| Histology | |
| Low grade dysplasia | 534 (37.0) |
| High grade dysplasia | 176 (12.2) |
| Differentiated EGC | 655 (45.4) |
| Undifferentiated EGC | 78 (5.4) |
| Procedure time, min | 61.8 (± 47.0) |
| Curability | |
| Complete resection | 1287 (89.0) |
| Incomplete resection | 156 (11.0) |
| Resectability | |
| En bloc | 1318 (91.3) |
| Piecemeal | 125 (8.7) |
| Perforation | 39 (2.7) |
| Post-ESD bleeding | 63 (4.3) |
EGC: Early gastric cancer; ESD: Endoscopic submucosal dissection.