Table 1.

Patient characteristics.

Patient characteristic	Number of patients (%)
Gender
Female	64 (65.3%)
Male	34 (34.7%)
Smoking behavior
Non-smoker	7 (7.1%)
Smoker	76 (77.6%)
Unknown	15 (15.3%)
Clinical stage
I	43 (43.9%)
II	26 (26.5%)
III	22 (22.4%)
IV	7 (7.1%)
Tumor classification
T1	32 (32.7%)
T2	38 (38.8%)
T3	22 (22.4%)
T4	6 (6.1%)
N0	66 (67.3%)
N1	19 (19.4%)
N2	13 (13.3%)
M0	90 (91.8%)
M1	8 (8.2%)
Metastasis during follow-up
No	71 (72.4%)
Yes	27 (27.6%)
Differentiation
Poor	28 (28.6%)
Moderate	34 (34.7%)
Well	36 (36.7%)
Neo-adjuvant therapy
No	81 (82.7%)
Yes	17 (17.3%)
Adjuvant therapy
No	50 (51.0%)
Yes	40 (40.8%)
Unknown	8 (8.2%)

Overview of the clinicopathological parameters of patients.