Table 1. Basic characteristics of the TSCC patients and healthy controls.

	Healthy controls(n = 15)	TSCC patients(n = 76)
Gender
Male	6	41
Female	9	35
Age(mean ± SD years)	55.46 ± 11.03	55.47 ± 8.30
Tumor size
T1-T2		59
T3-T4		17
Node metastasis
Yes (N1 or N2)		34
No (N0)		42
Differentiation
Well		37
Moderate		31
Poor		8
Clinical stage
Early stage (I-II)		38
Advanced stage (III-IV)		38