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Table 1 Clinical characteristics of the gastric lesions
| Number | Percent | |
|---|---|---|
| Total no. of gastric lesions | 299 | |
| Age (years, mean ± SD) | 71.6 ± 9.1 | |
| Sex | ||
| Male | 225 | (75.3) |
| Female | 74 | (24.7) |
| Under antithrombotic therapy | 81 | (27.1) |
| Single antiplatelet agent | 52 | |
| ≥ 2 antiplatelet agents | 11 | |
| Single anticoagulant agent | 12 | |
| Antiplatelet(s) plus anticoagulant | 6 | |
| On hemodialysis | 1 | (0.3) |
| Tumor location | ||
| Upper third | 47 | (15.7) |
| Middle third | 142 | (47.5) |
| Lower third | 110 | (36.8) |
| Length of the resected specimen (mm, mean ± SD) | 36.4 ± 15.3 | |
| Morphology | ||
| Elevated | 174 | (58.2) |
| Flat or depressed | 125 | (41.8) |
| Pathology | ||
| Adenoma | 51 | (17.1) |
| Adenocarcinoma, differentiated type | 231 | (77.3) |
| Adenocarcinoma, undifferentiated type | 17 | (5.7) |
| Depth of invasion | ||
| M | 263 | (88.0) |
| SM, ≤ 500 mm (micrometer) | 16 | (5.4) |
| SM, > 500 mm (micrometer) | 20 | (6.7) |
| Ulcer scar within the lesion | 16 | (5.4) |
| Curative resection by ESD | 266 | (89.0) |
