Table 1.

The c-index for the nomogram to predict OS and CSS

Group	Variable	OS		CSS
c-index	95% CI	c-index	95% CI
SEER discovery set (n=10,262)	Nomogram	0.753	0.745–0.761	0.748	0.740–0.756
	Grade	0.654	0.646–0.662	0.68	0.670–0.690
	TNM	0.555	0.547–0.563	0.572	0.562–0.580
Size	0.618	0.612–0.624	0.636	0.628–0.644
SEER testing set (n=5,132)	Nomogram	0.758	0.746–0.770	0.752	0.740–0.764
	Grade	0.563	0.553–0.573	0.581	0.569–0.593
	TNM	0.659	0.649–0.669	0.688	0.676–0.699
Size	0.619	0.609–0.629	0.637	0.625–0.649
SYMH cohort (n=244)	Nomogram	0.702	0.647–0.757	0.686	0.629–0.742
	Grade	0.585	0.540–0.630	0.577	0.529–0.624
	TNM	0.678	0.629–0.727	0.667	0.614–0.719
Size	0.62	0.573–0.667	0.609	0.560–0.658

Abbreviations: SYMH, Sun Yat-Sen Memorial Hospital; TNM, tumor lymph node metastasis; OS, overall Survival; CSS, cancer-specific survival.