Table 1.

Clinicopathological characteristics of the study population

	Tissue samples	Serum samples	Healthy controls
	(n = 25)
Gender
Male	15	57	26
Female	10	37	14
Age
Mean ± SD	60 ± 7	59 ± 7	59 ± 8
Median (range)	61 (45-72)	60 (40-74)	60 (41-74)
Tumor size (cm)
<5	19	59
≥5	6	35
TNM stage
I	13	18
II	9	21
III	3	42
IV	0	13
Differentiation
Well and moderate	13	50
Poor	12	44
Invasion depth
T1	3	9
T2	7	32
T3	12	35
T4	3	18
Lymph node metastasis
Positive	18	50
Negative	7	44