Table 7.

Net benefit of the Mayo criteria and nomogram scoring system in predicting metastatic lymph nodes in the validation cohort.

Threshold (%)	Net benefit		Advantage of nomogram
	Mayo (%)	Nomogram (%)	Net benefit (%)	Net reduction (%)
0	11.8	11.8	0.0	0.0
1	10.9	10.9	0.0	0.0
2	10.0	10.0	0.0	0.0
3	9.0	9.1	0.1	3.2
4	8.4	8.2	−0.2	−4.8
5	7.6	7.6	0.0	0.0
6	6.7	7.2	0.5	7.8
7	5.9	6.8	0.9	12.0
8	5.1	6.5	1.4	16.1
9	4.2	6.1	1.9	19.2
10	3.3	5.7	2.4	21.6
11	2.4	5.2	2.8	22.7
12	1.4	4.8	3.4	24.9
13	0.5	4.4	3.9	26.1
14	0.0	3.9	3.9	24.0
15	0.0	3.5	3.5	19.8
16	0.0	3.0	3.0	15.8
17	0.0	2.5	2.5	12.2
18	0.0	2.0	2.0	9.1
19	0.0	1.5	1.5	6.4
20	0.0	1.0	1.0	4.0