Table 4.

subgroup analyses according to PFS and OS.

	PFS		OS
Variables in the equation	P	Hazard ratio (95% CI)	P	Hazard ratio (95.0% CI)
Age
<57	.300	1.401 (0.740–2.653)	.054	2.153 (0.988–4.691)
>57	.071	1.697 (0.956–3.013)	.191	1.534 (0.808–2.912)
Gender
Male	.451	1.298 (0.659–2.557)	.015	2.709 (1.212–6.052)
Female	.050	1.754 (1.000–3.077)	.271	1.419 (0.761–2.647)
Smoke status
Never	.031	1.730 (1.051–2.850)	.054	1.726 (0.990–3.012)
Smoker	.891	1.063 (0.444–2.548)	.014	2.185 (0.774–6.165)
Histology
ADC	.130	1.423 (0.901–2.248)	.068	1.627 (0.965–2.743)
Others	.072	3.922 (0.885–17.376)	.134	3.570 (0.675–18.876)
TNM stage
III	.177	2.268 (0.691–7.441)	.931	1.072 (0.221–5.199)
IV	.127	1.443 (0.901–2.311)	.041	1.740 (1.024–2.959)