Table 2.

Demographic and clinical features of the esophageal squamous cell intraepithelial neoplasia patients and normal individuals in serum and serum exosomal miRNA study

Variables	Patients (n = 21)		Normal controls (n = 21)		P-value
	No.	%	No.	%
Average age (years)	63.2		59.3
Age (years)
≤60	7	33.3	10	47.6	0.53
>60	14	66.7	11	52.4
Sex
Male	14	66.7	14	66.7	1.00
Female	7	33.3	7	33.3
Stage of intraepithelial neoplasia
High	15	71.4
Low	6	28.6