Overexpression of Spondin-2 Is Associated with Recurrence-Free Survival in Patients with Localized Clear Cell Renal Cell Carcinoma

Table 4

Comparison of the prognostic accuracy of the prognostic models and SPON2 expression for recurrence-free survival of patients with localized ccRCC.

Model	Recurrence-free survival
	C-index	AIC
Tumor grade	0.771	66.285
Sarcomatoid	0.706	72.084
SPON2 mRNA	0.915	69.002
Tumor grade + Sarcomatoid	0.877	60.585
Tumor grade + SPON2 mRNA	0.893	60.176
Sarcomatoid + SPON2 mRNA	0.915	62.519
Tumor grade + Sarcomatoid + SPON2 mRNA	0.939	56.465

C-index: Harrell concordance index; AIC: Akaike information criteria.