Table 3.

C‐index of prognostic staging systems for OS and RFS

Prognostic system	Training cohort						Validation cohort
	OS			RFS			OS			RFS
	C‐index	95%CI	P value	C‐index	95%CI	P value	C‐index	95%CI	P value	C‐index	95%CI	P value
Nomogram	0.742	0.684‐0.800		0.669	0.623‐0.715		0.740	0.653‐0.827		0.676	0.606‐0.745
AJCC eighth	0.632	0.583‐0.680	<.001	0.608	0.570‐0.647	<.001	0.576	0.503‐0.648	<.001	0.571	0.514‐0.629	<.001
BCLC stage	0.553	0.515‐0.591	<.001	0.554	0.524‐0.584	<.001	0.533	0.479‐0.587	<.001	0.529	0.486‐0.571	<.001
JIS score	0.557	0.519‐0.595	<.001	0.551	0.521‐0.581	<.001	0.553	0.497‐0.610	<.001	0.522	0.478‐0.567	<.001
Model of Gan et al				0.636	0.591‐0.682	.012				0.621	0.553‐0.690	.031