Table 5.

The Comparison of LRTχ² and AIC for PFS and OS Between Nomogram and Prognostic Factors

	LRT χ2	c-Index	AIC	p-value
Training cohort for PFS
TNM stage	10.83	0.539	1589.2	0.004
Nomogram	49.35	0.675	1553.6	<0.001
Validation cohort for PFS
TNM stage	8.02	0.602	632.7	0.02
Nomogram	21.07	0.697	620.88	<0.001
Training cohort for OS
TNM stage	8.85	0.567	1310.7	0.01
Nomogram	34.36	0.662	1287.2	<0.001
Validation cohort for OS
TNM stage	8.30	0.605	474.1	0.02
Nomogram	16.09	0.664	468.32	<0.001

Abbreviations: LR, likelihood ratio; AIC, Akaike information criterion.