Table 5.

Performance of the Mayo and nomogram scoring system in predicting metastatic lymph nodes in the validation cohort.

Performance parameter	Model		Comparison
	Mayo	Nomogram	Nomogram vs. Mayo
AUC	0.56	0.71	0.15a
Accuracy	0.26	0.64	0.38
Specificity	0.17	0.62	0.45
Sensitivity	0.96	0.79	−0.17
Positive-LR	1.62	2.09	0.47
Negative-LR	0.21	0.34	0.13
Positive-PV	0.14	0.22	0.08
Negative-PV	0.97	0.96	−0.01

AUC, area under the receiver operating characteristic curve; LR, likelihood ratio; PV, predictive value;

^aP < 0.001 for comparing AUCs.