| Characteristics | Number | % |
| Age, years | ||
| Median | 61.8 | |
| Range | 38 - 75 | |
| Gender | ||
| Male | 11 | 55 |
| Female | 9 | 45 |
| ECOG PS 0/1/2 | 20/0/0 | 100/0/0 |
| Pathological stage | ||
| IB | 2 | 10 |
| IIA | 1 | 5 |
| IIB | 7 | 35 |
| IIIA | 10 | 50 |
| Histological type | ||
| Adenocarcinoma | 16 | 80 |
| Squamous cell carcinoma | 4 | 20 |
| Type of surgery | ||
| Lobectomy | 19 | 95 |
| Pneumonectomy | 1 | 5 |