Table II.

Distribution of characteristics between different risk groups.

	TCGA cohort			GEO cohort
Characteristic	High risk	Low risk	P-value	High risk	Low risk	P-value
Age, years			<0.01a			<0.01a
<60	29	57		12	30
≥60	171	143		70	53
Sex			0.30a			0.97a
Female	56	47		15	15
Male	144	153		67	68
Grade			<0.01b			<0.01a
High	197	180		48	12
Low	1	19		34	71
Unknown	2	1
TMN stage			<0.01b			-
I+II	37	92		-	-
III+IV	162	107		-	-
Unknown	1	1		-	-
Muscle invasion			-			<0.01a
Yes	-	-		47	15
No	-	-		35	68

^aχ² test;

^bFisher's exact test. GEO, Gene Expression Omnibus; TCGA, The Cancer Genome Atlas.