Table 3. Lymph node metastasis rate with comparable T category.
| Stage number | T1 [%] (n=100) | T2 (%) (n=63) | T3 (%) (n=271) | T4 (%) (n=136) | Chi-square | P |
|---|---|---|---|---|---|---|
| 1 | 3 [3] | 3 (4.8) | 39 (14.4) | 21 (15.4) | 14.123 | 0.003 |
| 2 | 0 [0] | 0 (0) | 0 (0) | 5 (3.7) | 0.035 | 0.851 |
| 3 | 5 [5] | 11 (17.5) | 113 (41.7) | 59 (43.4) | 58.258 | 0 |
| 4 | 4 [4] | 7 (11.1) | 72 (26.6) | 42 (30.9) | 32.856 | 0 |
| 5 | 5 [5] | 5 (7.9) | 82 (30.3) | 47 (34.6) | 42.327 | 0 |
| 6 | 6 [6] | 16 (25.4) | 138 (50.9) | 80 (58.8) | 84.928 | 0 |
| 7 | 4 [4] | 5 (7.9) | 71 (26.2) | 31 (22.8) | 29.389 | 0 |
| 8 | 1 [1] | 4 (6.3) | 58 (21.4) | 34 (25.0) | 33.072 | 0 |
| 9 | 0 [0] | 1 (1.6) | 14 (5.2) | 11 (8.1) | 3.646 | 0.162 |
| 10 | 0 [0] | 0 (0) | 1 (0.4) | 4 (2.9) | 4.937 | 0.026 |
| 11 | 1 [1] | 0 (0) | 11 (4.1) | 9 (6.6) | 4.59 | 0.101 |
| 12 | 1 [1] | 1 (1.6) | 29 (10.7) | 18 (13.2) | 16.535 | 0.001 |
| 13 | 0 [0] | 0 (0) | 7 (2.6) | 5 (3.7) | 0.378 | 0.538 |
| 14 | 0 [0] | 0 (0) | 8 (3.0) | 4 (2.9) | 0 | 0.995 |
| 15 | 0 [0] | 0 (0) | 2 (0.7) | 6 (4.4) | 6.343 | 0.012 |
| 16 | 0 [0] | 0 (0) | 7 (2.6) | 5 (3.7) | 0.378 | 0.538 |
| Total | 18/100 [18] | 25/63 (39.7) | 206/271 (76.0) | 109/136 (80.1) | 138.11 | 0 |
n, number of patients; data format, patients had lymph node metastasis (lymph node metastasis rate); lymph node metastasis rate, patients had lymph node metastasis/n, 100%; total, patients had lymph node metastasis/all patients.