Table 4. Summary of groups with high negative-rate(R0) or high-expression rate(R2).

Classification	PD-L1 TPS, n (%)					Sum	R0(95% CI)	R2(95% CI)
	<1%		1%~49%		≥50%
Well~ medium differentiation &Clinical stages I~II &LUADs	145	36		4		185	0.784(0.724–0.884)	0.022(0.000–0.430)
Well~ medium differentiation &LUADs &N0	138	36		5		179	0.771(0.709–0.833)	0.028(0.004–0.052)
No smoking &LUADs &M0	113	33		4		150	0.753(0.684–0.823)	0.027(0.001–0.053)
Well~ medium differentiation &N0 &M0	173	44		7		224	0.772(0.717–0.828)	0.031(0.008–0.054)
Well~ medium differentiation &Clinical stages I~II	184	48		10		242	0.760(0.706–0.814)	0.041(0.016–0.067)
N1~N3 & LUSC	15	10		15		40	0.375(0.218–0.532)	0.375(0.218–0.532)
Poor differentiation &N3	7	9		13		29	0.241(0.076–0.407)	0.448(0.256–0.641)
Smoking &N3 &M0	3	3		10		16	0.188(0.040–0.460)	0.625(0.359–0.891)

Note: R0 means the rate of being negative in PD-L1 detection, R2 means the rate of being high expression in PD-L1 detection.