Table 2.
Comparison of tumor, node, metastasis classification, stage between patients with positive and negative margins n (%)
| Variable | Positive margins (n = 16) | Negative margins (n = 175) | P value |
| Depth of tumor invasion | < 0.001 | ||
| T1 | 0 (0) | 29 (16.6) | |
| T2 | 2 (12.5) | 84 (48.0) | |
| T3 | 11 (68.7) | 55 (31.4) | |
| T4 | 3 (18.8) | 7 (4.0) | |
| Node involvement | < 0.001 | ||
| N0 | 3 (18.8) | 67 (38.3) | |
| N1 | 2 (12.5) | 60 (34.3) | |
| N2 | 2 (12.5) | 26 (14.8) | |
| N3 | 9 (56.2) | 22 (12.6) | |
| Stage | < 0.001 | ||
| I | 0 (0) | 57 (32.6) | |
| II | 1 (6.3) | 42 (24.0) | |
| III | 6 (37.5) | 51 (29.1) | |
| IV | 9 (56.2) | 25 (14.3) |