Table 3.

Multivariate Cox regression analysis for overall survival (OS) in patients with metastatic lung adenocarcinoma

Variable	HR	95% CI	P‐value
Sex
Male	1.00 (Reference)
Female	0.78	0.76–0.80	<0.0001
Age
<65 years	1.00 (Reference)
>65 years	1.37	1.33–1.40	<0.0001
Living arrangements
Alone	1.00 (Reference)
With others	0.80	0.78–0.81	<0.0001
Liver metastases
No	1.00 (Reference)
Yes	1.45	1.40–1.50	<0.0001
Bone metastases
No	1.00 (Reference)
Yes	1.21	1.18–1.24	<0.0001
Brain metastases
No	1.00 (reference)
Yes	1.18	1.15–1.21	<0.0001
Lung metastases
No	1.00 (Reference)
Yes	1.00	0.98–1.03	0.969

CI, confidence interval; HR, hazard ratio.