Table IV.

COX proportional hazards model for various factors related to prognosis in patients with NSCLC.

Variable	β	SE	Wald χ2	P-value	RR	RR 95% CI
Age	−0.131	0.252	0.147	0.673	0.859	0.541–1.515
Sex	0.014	0.364	2.005	0.172	1.716	0.883–3.248
Differentiation	0.459	0.372	0.018	0.947	0.978	0.495–1.897
Lymph node metastasis	1.411	0.327	20.523	<0.001	4.012	2.372–7.586
Pathological type	−0.119	0.245	0.566	0.517	0.914	0.613–1.317
Tumor size	−0.034	0.236	0.047	0.796	0.885	0.512–1.526
Common low expression	1.314	0.362	19.021	<0.001	3.872	1.971–6.315

NSCLC, non-small cell lung cancer.