Variable | N | 5-year OS (%) | p | 5-year PFS (%) | p | 5-year LRFS (%) | p | 5-year DMFS (%) | p |
---|---|---|---|---|---|---|---|---|---|
Gender | |||||||||
Male | 423 | 78.0 | 0.04 | 67.5 | 0.194 | 89.0 | 0.619 | 82.2 | 0.328 |
Female | 168 | 85.6 | 74.1 | 87.2 | 87.8 | ||||
Age (years) | |||||||||
< 45 | 205 | 86.3 | 0.039 | 72.0 | 0.463 | 87.3 | 0.744 | 84.9 | 0.846 |
≥ 45 | 386 | 76.8 | 67.9 | 89.0 | 83.2 | ||||
T stage | |||||||||
T1 + T2 | 271 | 82.4 | 0.28 | 72.8 | 0.096 | 93.1 | 0.003 | 85.2 | 0.802 |
T3 + T4 | 320 | 77.2 | 62.4 | 82.9 | 81.7 | ||||
N stage | |||||||||
N0 + N1 | 211 | 86.6 | 0.004 | 79.8 | < 0.001 | 91.7 | 0.025 | 90.4 | 0.002 |
N2 + N3 | 380 | 73.9 | 58.8 | 86.0 | 78.9 | ||||
TNM stage | |||||||||
I + II | 108 | 89.6 | 0.006 | 84.4 | < 0.001 | 94.9 | 0.014 | 92.3 | 0.015 |
III + IVa | 483 | 76.7 | 64.6 | 86.3 | 81.1 | ||||
Involvement of lower neck levels | |||||||||
Yes | 90 | 57.6 | < 0.001 | 41.7 | < 0.001 | 82.3 | 0.07 | 68.7 | < 0.001 |
No | 501 | 83.5 | 74.2 | 89.3 | 86.7 |