Table 1.
Clinical characteristics of the study group.
| Clinical Parameter | Number of Patients | |||
|---|---|---|---|---|
| Smoking tobacco products | Yes—40 | No—21 | ||
| Pack–year | Mean—39.69 (SD—18.33) | |||
| Histological subtype | Sqamous cell carcinoma 31 |
Adenocarcinoma 20 |
Large-cell carcinoma 5 |
Other 6 |
| Primary tumor size (T in TNM classification) |
T1—12 | T2—23 | T3—16 | T4—10 |
| Lymph node involvement (N in TNM classification) |
N0—16 | N1—27 | N2—16 | N3—2 |
| Presence of distant metastasis (M in TNM classification) |
Mx—25 | M0—30 | M1—6 | |
| Another cancer | Yes—12 | No—59 | ||