Features | No. of patient | OS | PFS |
---|---|---|---|
P value | P value | ||
Gender | |||
Male | 231 | ||
Female | 134 | 0.631 | 0.661 |
Age | |||
≤ 60 years | 205 | ||
> 60 years | 160 | 0.001 | 0.002 |
Smoking | |||
None | 224 | ||
No more than 20 years and 20/day | 40 | ||
Above 20 years or 20/day | 101 | 0.704 | 0.667 |
Alcohol | |||
None | 300 | ||
No more than 20 years and 250 g/day | 39 | ||
Above 20 years or above 250g/day | 26 | 0.278 | 0.281 |
Lymph node level | |||
II/III | 226 | ||
IV | 139 | 0.546 | 0.564 |
Pathological type | |||
Squamous cell carcinoma | 192 | ||
Adenocarcinoma | 118 | ||
Other types | 55 | 0.833 | 0.750 |
Pathological grade | |||
Highly differentiated | 204 | ||
Moderately differentiated | 9 | ||
Poorly differentiated | 152 | 0.001 | 0.001 |
Involved nodal stage | |||
N1 | 38 | ||
N2a | 22 | ||
N2b | 185 | ||
N2c | 110 | ||
N3 | 10 | 0.029 | 0.025 |
Initial treatment | |||
No treatment | 54 | ||
Chemotherapy | 91 | ||
Surgery | 192 | ||
Radiotherapy | 28 | 0.037 | 0.017 |
Local recurrence | |||
Yes | 20 | ||
No | 345 | 0.065 | 0.051 |
Distant metastasis | |||
Yes | 81 | ||
No | 284 | 0.001 | 0.001 |