Table 2. Clinical characteristics of the ESCC patients included in GEO.

Clinical characteristics	N	Relative expression of miR-30b-5p
		Mean ± SD	t	P
Gender			−1.516	0.132
Male	98	0.80±0.41
Female	21	0.96±0.55
Age, years			−1.418	0.159
≥60	58	0.77±0.34
<60	61	0.88±0.51
Family history			0.525	0.605
Positive	42	0.89±0.67
Negative	40	0.81±0.37
Tobacco			−0.302	0.763
Yes	80	0.82±0.41
No	39	0.85±0.50
Alcohol			−1.085	0.280
Yes	74	0.79±0.38
No	45	0.88±0.52
Tumor Location			F=0.608a	0.546
Upper	14	0.82±0.45
Middle	69	0.86±0.48
Lower	36	0.76±0.34
Tumor Grade			F=1.645a	0.198
Well	23	0.73±0.31
Moderately	64	0.81±0.39
Poorly	32	0.94±0.58
T status			F=0.054a	0.054
T1	8	1.13±0.32
T2	20	0.64±0.46
T3	62	0.83±0.37
T4	29	0.87±0.53
N status			F=1.995a	0.119
N0	54	0.76±0.44
N1	42	0.88±0.38
N2	13	0.75±0.44
N3	10	1.08±0.56
TNM			F=1.312a	0.273
I	6	0.90±0.39
II	47	0.75±0.38
III	66	0.88±0.48

^a, one-way analysis of variance (ANOVA) test was utilized. GEO, Gene Expression Omnibus; SD, standard deviation; t, Student’s t-test; ESCC, esophageal squamous cell carcinoma.