Table 4.

Multivariate Analysis of the Prognostic Factors of Survival in Patients with NSCLC

Variable	Relapse-Free Survival		Overall Survival
HR (95% CI)	P-value	HR (95% CI)	P-value
Lymphatic metastasis
(Yes vs No)	1.477(0.809–2.696)	0.204	2.359(1.268–4.388)	0.007*
Tumor stage
(III vs I-II)	3.617(2.072–6.312)	<0.001*	3.023(1.601–5.709)	0.001*
BTLA expression
(Positive vs negative)	1.219(0.695–2.140)	0.490	–	–
PD-L1 expression
(Positive vs negative)	1.774(1.044–3.014)	0.034*	1.545(0.870–2.744)	0.138

Note: *Stands for the value of p < 0.05.

Abbreviations: BTLA, B and T lymphocyte attenuator; HR, hazard ratio; CI, confidence interval.