Table 1. Comparison of clinicopathologic factors by tumor B7-H1 expression.

	B7-H1+	B7-H1-	P-value
	42 (40%)	64 (60%)
Gender			0.72
Male	35 (83%)	55 (86%)
Female	7 (17%)	9 (14%)
Age (years; median, IQR)	68 (59-75)	65 (58-73)	0.19
Decade of Diagnosis			0.57
1980's	0 (0%)	1 (2%)
1990's	22 (52%)	35 (55%)
2000's	20 (48%)	28 (43%)
Subtype			<0.0001
Epithelial	14 (33%)	54 (84%)
Sarcomatoid	16 (38%)	1 (2%)
Biphasic	12 (29%)	9 (14%)
Lymphocytic infiltration			0.36
Yes	38 (90%)	54 (84%)
No	4 (10%)	10 (16%)
Surgical Treatment			0.03
Yes	7 (17%)	23 (36%)
No	35 (83%)	41 (64%)

The results of the univariate analysis are presented in the “P-value” column.