Table 2.
Characteristics of tumors in the two groups
| Group E | Group O | P value | |
|---|---|---|---|
| Size of tumors (mm) | 17.3 ± 10.5 | 19.7 ± 17.0 | 0.14 |
| Location of tumors | 0.10 | ||
| Esophagus | 0 (0%) | 2 (2.0%) | |
| Stomach | 196 (100%) | 99 (98.0%) | |
| Upper third | 28 (14.3%) | 12 (11.9%) | |
| Middle third | 83 (42.3%) | 52 (51.5%) | |
| Lower third | 85 (43.4%) | 35 (34.7%) | |
| Number of tumors | 0.07 | ||
| Single | 185 (94.4%) | 89 (88.1%) | |
| Multiple | 11 (5.6%) | 12 (11.9%) | |
| Histological classification | 0.65 | ||
| 0-I | 5 (2.6%) | 4 (4.0%) | |
| 0-IIa | 82 (41.8%) | 38 (37.6%) | |
| 0-IIb | 5 (2.6%) | 6 (5.9%) | |
| 0-IIc | 92 (46.9%) | 48 (47.5%) | |
| 0-IIa + IIc | 11 (5.6%) | 5 (5.0%) | |
| SMT | 1 (0.5%) | 0 (0%) | |
| Macroscopic classification | 0.25 | ||
| Adenoma | 55 (28.1%) | 28 (27.7%) | |
| Tub1 | 114 (58.1%) | 58 (57.4%) | |
| Tub2 | 18 (9.2%) | 6 (5.9%) | |
| por | 1 (0.5%) | 4 (4.0%) | |
| Others | 8 (4.1%) | 5 (5.0%) | |
| Depth of invasion | 0.97 | ||
| m | 174 (88.8%) | 91 (90.1%) | |
| sm | 22 (11.2%) | 10 (9.9%) |
Group E: patients who underwent endoscopic submucosal dissection in the endoscopy room, Group O: patients who underwent endoscopic submucosal dissection in the operation room. Values are presented as mean ± standard deviation or n (%)