Table 7. The C-indexes of the established nomograms and other conventional staging systems.

C‐index	OS			RFS
	Training cohort	Validation cohort		Training cohort	Validation cohort
Nomogram	0.761 (0.734–0.788)	0.715 (0.676–0.754)		0.736 (0.710–0.762)	0.683 (0.643–0.723)
AJCC	0.710 (0.681–0.739)*	0.686 (0.646–0.726)*		0.700 (0.674–0.726)*	0.643 (0.602–0.684)*
BCLC	0.674 (0.647–0.701)*	0.643 (0.600–0.686)*		0.665 (0.640–0.690)*	0.609 (0.566–0.652)*
JIS	0.690 (0.660–0.720)*	0.684 (0.643–0.725)*		0.679 (0.654–0.704)*	0.649 (0.608–0.690)*
CNLC	0.693 (0.664–0.722)*	0.655 (0.610–0.700)*		0.673 (0.645–0.701)*	0.622 (0.582–0.662)*
CLIP	0.635 (0.606–0.664)*	0.655 (0.614–0.696)*		0.636 (0.608–0.664)*	0.641 (0.600–0.682)*
SOLMR	0.647 (0.620–0.674)*	0.593 (0.550–0.636)*		0.615 (0.589–0.641)*	0.576 (0.537–0.615)*

*, P<0.001 when compared with nomogram. AJCC, American Joint Committee on Cancer 8^th edition; BCLC, Barcelona Clinic Liver Cancer; JIS, Japan Integrated Staging; CNLC, China Liver Cancer staging; CLIP, Cancer of the Liver Italian Program.