| No/Low grade complications | High grade complications | p value | |
| Total number | 31 | 13 | |
| Age (years) | 64.8 ± 9.1 | 66.3 ± 7.3 | NS* |
| Sex M:F | 18:13 | 6:7 | NS* |
| Stage IA | 17 | 7 | NS* |
| Stage IB | 8 | 5 | NS* |
| Stage IIA | 2 | 1 | NS* |
| Stage IIB | 3 | 0 | NS* |
| Stage IIIA | 1 | 0 | NS* |
| Chest tube duration (days) | 3.2 ± 2.1 | 8.4 ± 4.4 | p < 0.01 |
| Length of stay (days) | 4.3 ± 2.4 | 9.7 ± 6.1 | p < 0.01 |