Table 2.

Serum PD-L1 levels and clinicopathological features.

	n	PD-L1 [ $\overline{\text{x}}+\text{s}$ ], pg/mL	p-value
Tumor size
<5.0cm	192	295.58±52.6	0.087
≥5.0cm	108	301.63±57.2
Tumor differentiation
Moderate	220	301.37±51.1	0.356
Poor	80	319.53±53.2
p Stage
pT1, pT2	100	301.02±53.7	0.001
pT3, pT4	200	332.13±55.3
pN0	136	289.56±51.1	0.001
pN1, pN2	164	331.28±58.1