Table 1:

SCLC patients’ characteristics according to the expression of PD-L1

Variables	Number of patients(%)	Total PD-L1	EVs PD-L1
		P value	P value
Age (years)
≤ 65	38(54.3)	0.0101	0.0282
> 65	32(45.7)
Gender
Male	55(82.9)	0.0863	0.0679
Female	15(17.1)
Smokinga
Ever	35(58.5)	0.1115	0.9147
Never	35(41.5)
Disease status
LD	24(34.3)	0.0035	0.001
ED	46(65.7)
Distant metastasis
M0	48(65.9)	0.0925	0.007
MX	22(34.1)

The p-value refers to Student’s t-test testing homogeneity of patients’ characteristics. Bold values indicate statistical significance(p<0.05).

LD, limited disease; ED, extensive disease; M0, no distant metastasis; MX, distant metastasis.

Smoking status is based on self-reported information.