| Characteristics | Patients with NSCLC, n = 234, (%) | Control, n = 383, (%) |
| Age (years): | ||
| Median | 61.9 | 63.8 |
| Мin/max | 32/88 | 33/94 |
| Gender: | ||
| Female | 53 (22.6) | 88 (23.00) |
| Male | 181 (77.3) | 295 (77.0) |
| Smoking status: | ||
| Does not smoke | 68 (29.1) | 166 (43.3) |
| Smokes | 145 (61.9) | 126 (32.9) |
| No information | 21 (9.0) | 91 (23.7) |
| Histology: | ||
| Squamous-cell carcinoma | 126 (53.8) |
|
| Adenocarcinoma | 108 (46.2) |
|
| Stage: | ||
| I | 103 (44.0) |
|
| II | 45 (19.2) |
|
| III | 70 (30.0) |
|
| IV | 16 (6.8) |
|
| Degree of the primary lesion spread (T): | ||
| T1 | 75 (32.1) |
|
| T2 | 107 (45.7) |
|
| T3 | 32 (13.7) |
|
| T4 | 20 (8.5) |
|
| Regional metastases (N): | ||
| N0 | 124 (53.0) |
|
| N1 | 45 (19.2) |
|
| N2 | 60 (25.6) |
|
| N3 | 4 (1.7) |
|
| Distant metastases (M): | ||
| M0 | 217 (92.7) |
|
| M1 | 17 (7.3) |
|