Table 3.

Comparison of the nomogram model with TNM and Fuhrman systems by Concordance index (C-index)

		C-index	C-index 95% CI		P ‡
OS	Nomogram	0.750	0.672	0.828	< 0.001*
	TNM	0.650	0.563	0.737	< 0.001*
	Fuhrman	0.612	0.522	0.702	0.015*
DFS	Nomogram	0.740	0.671	0.809	< 0.001*
	TNM	0.639	0.569	0.709	< 0.001*
	Fuhrman	0.641	0.568	0.714	< 0.001*

Abbreviations: OS = overall survival; DFS = disease-free survival; C-index = Concordance index; CI = confidence interval.

^‡ P-value from the z test;

^*Statistically significant (P < 0.05).