Table 3.

Univariate analysis by Cox’ proportional hazard method

Variate	Hazard ratio	95% CI, (upper and lower)		p value
Gender
Male	1
Female	0.68	0.59	0.78	<0.0001
Age
≥70	1
<70	0.87	0.77	0.99	0.384
Histology
Squamous	1
Adeno carcinoma	0.89	0.77	1.02	0.1015
Stage
IV	1
III	0.83	0.72	0.95	0.006
PS
0
1	1.05	0.93	1.18	0.3976
Chemotherapy
No	1
Yes	0.69	0.57	0.85	0.0009
Radiotherapy
No	1
Yes	0.81	0.69	0.93	0.003
Immunotherapy
No	1
Yes	0.81	0.93	1.18	0.0016