Table 2. Pathological characteristics (%).
| Data source | Total | Node metastasis | P value | |
|---|---|---|---|---|
| Negative | Positive | |||
| Biopsy | ||||
| UDC grade* | ||||
| U1 | 44 (13.6) | 35 (13.8) | 9 (13.0) | 0.518 |
| U2 | 43 (13.3) | 31 (12.2) | 12 (17.4) | |
| U3 | 236 (73.1) | 188 (74.0) | 48 (69.6) | |
| SRC grade** | ||||
| S0 | 177 (54.8) | 136 (53.5) | 41 (59.4) | 0.415 |
| S1 | 146 (45.2) | 118 (46.5) | 28 (40.6) | |
| Surgery | ||||
| UDC grade* | ||||
| U1 | 24 (7.4) | 22 (8.7) | 2 (2.9) | 0.280 |
| U2 | 92 (28.5) | 72 (28.3) | 20 (29.0) | |
| U3 | 207 (64.1) | 160 (63.0) | 47 (68.1) | |
| SRC grade** | ||||
| S0 | 169 (52.3) | 136 (53.5) | 33 (47.8) | 0.418 |
| S1 | 154 (47.7) | 118 (46.5) | 36 (52.2) | |
| Depth of invasion | ||||
| LP | 113 (35.0) | 103 (40.6) | 10 (14.5) | <0.001 |
| MM | 52 (16.1) | 43 (16.9) | 9 (13.0) | |
| SM | 158 (48.9) | 108 (42.5) | 50 (72.5) | |
| LVI | ||||
| − | 284 (87.9) | 238 (93.7) | 46 (66.7) | <0.001 |
| + | 39 (12.1) | 16 (6.3) | 23 (33.3) | |
*, r=0.523, P<0.001; **, r=0.491, P<0.001. The italic numbers are P values with statistical significance (<0.05). −, absence; +, presence. SRC, signet ring cell; LP, lamina propria; MM, muscularis mucosa; SM, submucosa; LVI, lymphovascular invasion.