miR-302b is a potential molecular marker of esophageal squamous cell carcinoma and functions as a tumor suppressor by targeting ErbB4

Table 3 Univariate analysis for progression free survival

Variables	N	Progression free survival (months)		P
Variables	N	Median ± SE	95% CI	P
miR-302b				0.001
Low	34	12.92 ± 1.03	10.91-14.93
High	16	19.82 ± 0.77	18.32-21.33
Age				0.676
<65	34	17.29 ± 1.23	15.28-19.31
≥65	16	17.20 ± 2.63	12.05-22.35
Gender				0.586
Male	29	17.26 ± 1.08	15.12-19.36
Female	21	18.63 ± 1.45	15.78-21.47
Smoking				0.173
Yes	37	16.37 ± 0.95	14.50-18.24
No	13	18.94 ± 1.72	15.56-22.31
Drinking				0.365
Yes	30	16.89 ± 1.15	14.63-19.15
No	20	18.09 ± 1.17	15.80-20.39
Differentiation				0.108
Well + Moderate	39	17.87 ± 1.00	15.91-19.83
Poor	11	14.00 ± 2.54	9.20-18.80
TNM stage				0.716
I–II	19	18.04 ± 1.22	15.65-20.43
III–IV	31	16.79 ± 1.39	14.07-19.51
Lymph node				0.005
Metastasis	30	14.67 ± 1.35	12.03-17.31
No metastasis	20	20.2 ± 0.84	18.56-21.85

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