Table 5. Cox regression analysis of risk score and clinical characteristics in the entire patients (n = 184).

Variable	Hazard Ratio (95% CI)		P
Univariate analysis
Risk score	2.35	1.73–4.21	0.005
Age	1.62	1.15–2.83	0.02
Histology type	0.86	0.36–2.05	0.75
Smoking status	2.16		0.009
Multivariate analysis
Risk score	1.93	1.65–2.23	0.01
Age	1.25	1.08–1.42	0.07
Histology type	1.03	1.02–1.04	0.14
Smoking status	1.52	1.16–1.85	0.04