Table 2.
Risk factors for lymph node metastasis in intramucosal gastric cancer (n = 1340) by univariate analysis n (%)
| Negative | Positive | P value | |
| Gender | 0.217 | ||
| Male/female | 843/458 | 29/10 | |
| Age | 58.5 ± 11.8 | 50.6 ± 14.5 | < 0.001 |
| Size of tumor (mm, mean ± SD) | 23.5 ± 15.7 | 37.9 ± 28.6 | < 0.001 |
| Tumor size | < 0.001 | ||
| ≤ 30 mm | 961 (81) | 18 (54) | |
| > 30 mm | 224 (19) | 15 (46) | |
| Tumor location | 0.052 | ||
| Upper | 192 (15) | 14 (36) | |
| Middle | 736 (59) | 19 (48) | |
| Lower | 324 (26) | 6 (16) | |
| Lauren | < 0.001 | ||
| Intestine type | 634 (61) | 11 (38) | |
| Diffuse type | 371 (36) | 16 (55) | |
| Mix type | 33 (3) | 2 (7) | |
| Histologic type | 0.715 | ||
| Differentiated | 799 (62) | 20 (53) | |
| Undifferentiated | 498 (38) | 18 (47) | |
| Ulcer finding | 0.757 | ||
| Absence/presence | 619/550 | 14/14 | |
| Lymphatic invasion | < 0.001 | ||
| Absence/presence | 1202/93 | 23/15 | |
| Vascular invasion | < 0.001 | ||
| Absence/presence | 1272/22 | 22/17 | |
| Perineural invasion | < 0.001 | ||
| Absence/presence | 1279/13 | 36/3 |