Table 2B. Multivariate analysis to determine molecular markers associated with prognosis (OS) of patients.

Variables	Odd ratios	95% confidence interval	p
PD-L1 staining	0.380	0.200-0.648	0.001*
T stage	0.937	0.583-1.506	0.787
Tumor resection	1.796	1.080-2.989	0.024*
LN involvement	1.106	0.647-1.891	0.713
Treatment response	0.403	0.230-0.707	0.002*
Recurrence and/or distant metastasis	0.387	0.192-0.703	0.003*