Table 1.
Pathologic characteristics of early gastric cancer in endoscopic images and videos across datasets
| Internal dataset | External dataset | ||||||
|---|---|---|---|---|---|---|---|
| Training set | Test set | ||||||
| Images (patients) | Videos | Images (patients) | Videos | Images (patients) | Videos | ||
| Total | 4336 (1906) | 153 | 260 (100) | 10 | 436 (153) | 89 | |
| Differentiation status | Differentiated | 3486 (1499) | 105 | 147 (50) | 5 | 205 (72) | 88 |
| Undifferentiated | 850 (407) | 48 | 113 (50) | 5 | 231 (81) | 1 | |
| Invasion depth | Mucosal | 3309 (1419) | 111 | 114 (50) | 6 | 248 (87) | 78 |
| Submucosal | 1027 (487) | 42 | 136 (50) | 4 | 188 (66) | 11 | |
| Lymphovascular invasion | Positive | 327 (154) | 10 | 50 (19) | 1 | 50 (18) | 4 |
| Negative | 4005 (1750) | 143 | 210 (81) | 9 | 386 (135) | 85 | |
| Lymph node metastasis | Positive | 187 (83) | 6 | 32 (9) | 3 | 57 (20) | N/A |
| Negative | 1755 (819) | 99 | 169 (64) | 5 | 379 (133) | N/A | |