Scientific Reports

Table 3 Compactness and staging factors for predicting overall and progression-free survival.

From: Tumor Compactness based on CT to predict prognosis after multimodal treatment for esophageal squamous cell carcinoma

	Progression-free survival				Overall survival
	Variables	C-index	95% CI		Variables	C-index	95% CI
Sichuan	Compactness	0.6612	0.5813	0.7411	Compactness	0.6410	0.5547	0.7273
training	T stage	0.5837	0.5067	0.6607	T stage	0.5849	0.5029	0.6669
training	TNM	0.5277	0.4833	0.5720	TNM	0.5294	0.4824	0.5765
Fujian	Compactness	0.6040	0.5372	0.6709	Compactness	0.6073	0.5338	0.6808
validation	T stage	0.5089	0.4455	0.5724	T stage	0.5669	0.4966	0.6373
	N stage	0.5303	0.4885	0.5721	N stage	0.5462	0.4992	0.5932
	M stage	0.5192	0.4629	0.5755	M stage	0.5614	0.5015	0.6212
	TNM	0.5271	0.4644	0.5899	TNM	0.6015	0.5324	0.6706
Beijing	Compactness	0.5706	0.5326	0.6085	Compactness	0.5780	0.5382	0.6177
validation	T stage	0.5476	0.5102	0.5849	T stage	0.5521	0.5129	0.5913
	N stage	0.5245	0.4968	0.5522	N stage	0.5258	0.4966	0.5550
	M stage	0.5295	0.4991	0.5598	M stage	0.5199	0.4883	0.5515
	TNM	0.5446	0.5102	0.5789	TNM	0.5389	0.5029	0.5748

CI: confidence interval.

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