Table 1. Relationship between depth of tumor invasion and clinicopathological factors.
| Factor | Depth of tumor invasion | P-value | |||
|---|---|---|---|---|---|
| pT1 (n = 138) | pT2 (n = 17) | pT3 (n = 55) | pT4 (n = 37) | ||
| Sex | |||||
| Male | 90 (65.2) | 14 (82.3) | 37 (67.3) | 23 (62.2) | 0.5045 |
| Female | 48 (34.8) | 3 (17.7) | 18 (32.7) | 14 (37.8) | |
| Age (y) | |||||
| ≤ 70 | 72 (52.2) | 11 (64.7) | 29 (52.7) | 25 (67.6) | 0.3139 |
| >70 | 66 (47.8) | 6 (35.3) | 26 (47.3) | 12 (32.4) | |
| Lymph node metastasis | |||||
| Negative | 114 (82.6) | 8 (47.1) | 14 (25.4) | 7 (18.9) | < 0.0001 |
| Positive | 24 (17.4) | 9 (52.9) | 41 (74.6) | 30 (81.1) | |
| Stage | |||||
| I | 130 (94.2) | 9 (52.9) | 0 (0.0) | 0 (0.0) | < 0.0001 |
| II-III | 8 (5.8) | 8 (47.1) | 55 (100.0) | 37 (0.0) | |
| Lymphatic invasion | |||||
| Negative | 112 (81.2) | 6 (35.3) | 10 (18.2) | 3 (8.1) | < 0.0001 |
| Positive | 26 (18.8) | 11 (64.7) | 45 (81.8) | 34 (91.9) | |
| Venous invasion | |||||
| Negative | 125 (90.6) | 5 (29.4) | 14 (25.4) | 3 (8.1) | < 0.0001 |
| Positive | 13 (9.4) | 12 (70.6) | 41 (74.6) | 34 (91.9) | |
pT1: invasion of lamina propria or submucosa; pT2: invasion of muscularis propria; pT3: invasion of subserosa; pT4: penetration of serosa or invasion of adjacent structures.