Table 5. Effects of clinical variables on mortality rates by multivariate Cox regression analysis.
| Hazard ratio | 95%CI | p | |
| Stage | |||
| IIB | Referans | ||
| IIIA | 0,706 | 0.147-3.388 | 0,663 |
| Lymph node invasion | |||
| N0 | Referans | ||
| N1 | 0,239 | 0.110-0.522 | <0.001 |
| N2 | 0,217 | 0.044-1.061 | 0,059 |
| Type of operation | |||
| Other | Referans | ||
| Lobectomy | 1,429 | 0.482-4.235 | 0,520 |
| Pneumonectomy | 3,369 | 1.137-9.976 | 0,028 |
| Chemotherapy | |||
| Yes | Referans | ||
| No | 2,791 | 1.383-5.631 | 0,004 |
| Radiotherapy | |||
| Yes | Referans | ||
| No | 0,607 | 0.302-1.221 | 0,161 |
| Recurrence | |||
| Yes | Referans | ||
| No | 2,254 | 1.275-3.986 | 0,005 |
| CI: Confidence interval. | |||