Table S6. CT texture parameters for variance comparison in different T, lymph node metastasis and overall stages of esophageal squamous carcinomas.

Parameters	Unenhanced CT (I-S test or M-W test)				Contrast enhanced CT (I-S test or M-W test)
	T1–2/T3–4	N–/N+	I–II/III–IV		T1–2/T3–4	N–/N+	I–II/III–IV
Mean	0.343	0.005*	0.003*		0.557	0.061	0.238
10th percentile	0.169	0.003*	0.001*		0.273	0.614	0.993
90th percentile	0.440	0.006*	0.003*		0.961	0.004*	0.025*
Skew	0.315	0.006*	<0.001*		0.939	0.196	0.001*
Kurtosis	0.025*	0.023*	<0.001*		0.083	0.336	<0.001*
Entropy	0.027*	0.216	0.306		0.030*	<0.001*	<0.001*

I-S test, independent samples t-test; M-W test, Mann-Whitney U test. *, P<0.05. T1–2, T1 and T2 stages were categorized as T1–2 group; N–/N+: N–, without lymph node metastasis and N+, with lymph node metastasis; T3–4, T3 and T4 stages were categorized as T3–4 group; CT, computed tomography.