Table S8. CT texture parameters for variance comparison in different N stages and differentiation degrees of esophageal squamous carcinomas.

Parameters	Unenhanced CT (One-way analysis of variance/I-S Kruskal-Wallis test)			Contrast enhanced CT (One-way analysis of variance/I-S Kruskal-Wallis test)
	N stage	Differentiation degree		N stage	Differentiation degree
Mean	0.058	0.565		0.064	0.458
10th percentile	0.091	0.370		0.202	0.141
90th percentile	0.078	0.780		0.015*	0.529
Skew	0.012*	0.703		0.258	0.637
Kurtosis	0.035*	0.740		0.516	0.662
Entropy	0.625	0.225		<0.001*	0.874

One-way analysis of variance (normality); I-S Kruskal-Wallis test, independent-samples Kruskal-Wallis test (non-normality); *, P<0.05. They were used to detect the difference of texture parameters among different N stages (N0, N1, N2 and N3) and differentiation degrees (poor, moderate and well).