Table 4.

Ranking of clinical staging system using C-index for RFS in training and validation cohort.

Variables	Training cohort		Validation cohort
	c-index	95% CI	c-index	95% CI
Nomogram	0.702	0.699–0.705	0.721	0.718–0.724
AFP	0.571	0.568–0.574	0.563	0.560–0.566
Tumor size	0.563	0.560–0.566	0.573	0.570–0.576
Differentiation	0.544	0.541–0.547	0.553	0.550–0.556
Tumor number	0.587	0.584–0.590	0.612	0.609–0.615
MVI	0.589	0.586–0.592	0.596	0.593–0.599
CHIP	0.582	0.579–0.585	0.607	0.604–0.610
HAP	0.564	0.561–0.567	0.573	0.570–0.576
SNA	0.613	0.610–0.616	0.587	0.584–0.590