Gene expression profile of peripheral blood in colorectal cancer

Table 1 Characteristics of the training and testing sets[1,2] n (%)

	Training set (n = 162)			Testing set (n = 176)			P value
	CRC (n = 55)	Non-CRC (n = 107)	P value	CRC (n = 56)	Non-CRC (n = 120)	P value	Cases	Controls
Age, yr (S.E.)	66.47 (1.50)	68.31 (1.12)	0.335	67.38 (1.83)	69.99 (1.03)	0.216	0.704	0.270
Gender			0.630			0.176	0.387	0.313
Male	32 (58.2)	58 (54.2)		28 (50.0)	73 (60.8)
Female	23 (41.8)	49 (45.8)		28 (50.0)	47 (39.2)
Stage			-			-	0.447	-
I	21 (38.2)	-		15 (26.8)	-
II	10 (18.2)	-		9 (16.1)	-
III	14 (25.5)	-		21 (37.5)	-
IV	10 (18.2)	-		11 (19.6)	-
Tumor site		-	-		-	-	0.286	-
Colon	28 (50.9)			30 (53.6)
Rectum	22 (40.0)			16 (28.6)
Cecum	4 (7.3)			5 (8.9)
Colon+Rectum	1 (1.8)			5 (8.9)

¹Data are given as means (SE) or as the number of cases (%); ²P-values were estimated using the t-test. CRC: Colorectal cancer.