Tumor size breakdown with percent positive node detection
| Size (cm) | Sentinel lymph nodes % positive | Lymphadenectomy % positive | Sentinel lymph nodes plus lymphadenectomy % positive | P value |
| <1 | 7.7 | 6.6 | 16 | 0.24 |
| 1.0–1.99 | 10.5 | 13.1 | 12.8 | 0.78 |
| 2.0–2.99 | 11.9 | 25.8 | 37.5 | 0.008 |
| 3.0–3.99 | 16.0 | 31.9 | 45.2 | 0.016 |
Significant p values are indicated in bold.