2.

PD-L1表达水平与临床病理特征关系

Relationship between PD-L1 expression level and clinicopathological characteristics

Item	PD-L1 expression level			P
	< 1.0% (n=184)	1.0%-49.0% (n=95)	≥50.0% (n=36)
*: 3 patients with Clinical stage data missing in < 1.0% group; 1 patient with Clinical stage data missing in 1.0%-49.0% group.
Gender				0.956
Male	112 (60.9%)	59 (62.1%)	23 (63.9%)
Female	72 (39.1%)	36 (37.9%)	13 (36.1%)
Age (yr)				0.832
< 65	102 (55.4%)	52 (54.7%)	18 (50.0%)
≥65	82 (44.6%)	43 (45.3%)	18 (50.0%)
Smoking status				0.138
Former	93 (64.1%)	56 (58.9%)	24 (66.7%)
Never	91 (49.5%)	39 (41.1%)	12 (33.3%)
Clinical stage*				0.041
Ⅰ	55 (30.4%)	22 (23.4%)	2 (5.6%)
Ⅱ	10 (5.5%)	7 (7.4%)	4 (11.1%)
Ⅲ	34 (18.8%)	18 (19.1%)	10 (27.8%)
Ⅳ	82 (45.3%)	47 (50.0%)	20 (55.6%)
Pathological type				0.909
Adenocarcinoma	147 (79.9%)	73 (76.8%)	28 (77.8%)
Squamous carcinoma	28 (15.2%)	18 (18.9%)	7 (19.4%)
Others	9 (4.9%)	4 (4.2%)	1 (2.8%)