Covariate

Hazard Ratio

P

Stage

Stage 1

Reference

Stage 2 or 3

HR = 3.6

<0.001

Metastatic

HR = N/A

0.37

Histology

Lung adenocarcinoma

Reference

Lung squamous cell carcinoma

HR = 2.7

0.001

Lung carcinoma (multiple types)

HR = N/A

0.07

Metastatic

HR = N/A

0.2

Laterality

Left

Reference

Right

HR = 0.56

0.014

Other

Age

HR = 1.09/year

<0.001