Multivariable Cox regression analyses of CT-defined emphysema status with overall survival
| HR | 95% CI | Adjusted p-value | |
| I-IIIA (n=253) CT-defined emphysema (yes or no) | 1.745 | 1.102–2.763 | 0.017 |
| IIIB-IV (n=601) CT-defined emphysema (yes or no) | 1.291 | 1.037–1.606 | 0.022 |
Note: The multivariate Cox regression analysis is adjusted for age, sex, smoking history, tumour histology and ECOG PS. CT: computed tomography; HR: hazard ratio.