Variable | Overall survival | Disease-free survival | ||
---|---|---|---|---|
HR (CI 95%) | P | HR (CI 95%) | P | |
Perineural invasion | ||||
No | 1.0 | 1.0 | ||
Yes | 2.03 (1.17-3.53) | 0.011 | 2.46 (1.46-4.15) | 0.00 |
Extended resection | ||||
No | 1.0 | 1.0 | ||
Yes | 2.40 (1.31-4.38) | 0.004 | 2.58 (1.46-4,56) | 0.001 |
Treatment modality | ||||
Surgery only | 1.61 (0.85-3.04) | 0.142 | * | * |
Adjuvant CT/RT | 1.0 | * | * | |
N-category – N-ratio | ||||
N0-NR0 | 1.0 | 0.021 | 1.0 | 0.008 |
N1-NR1a | 0.72 (0.16-3.17) | 0.661 | 0.65 (0.15-2.86) | 0.568 |
N1-NR1b | 1.92 (0.73-5.05) | 0.184 | 2.01 (0.81-4.96) | 0.131 |
N2-NR1 | 0.51 (0.14-1.81) | 0.297 | 0.41 (0.20-1.44) | 0.167 |
N2-NR2 and NR3 | 2.02 (0.93-4.39) | 0.076 | 2.26 (1.10-4.63) | 0.026 |
N3a – NR2 and NR3 | 2.78 (1.31-5.89) | 0.008 | 2.66 (1.30-5.44) | 0.007 |
N3b – NR3 | 2.96 (1.08-8.12) | 0.036 | 2.77 (1.03-7.44) | 0.043 |