Prediction of Cervical Lymph Nodes Metastasis in Papillary Thyroid Carcinoma (PTC) Using Nodal Staging Score (NSS)

Table 4

Number of lymph nodes examined corresponding to NSS values.

The number of lymph nodes examined	NSS (%)
	1	5	10	15	20	25
Gender
Male	40.0	74.7	87.6	92.4	94.8	96.0
Female	66.5	89.8	95.5	97.3	98.2	98.7
Age
≤45	57.4	85.6	93.4	96.1	97.4	98.1
>45	66.5	89.8	95.5	97.3	98.2	98.6
Extrathyroidal invasion
Negative	70.2	91.3	96.1	97.7	98.5	98.9
Positive	19.4	51.7	71.9	81.6	88.3	91.8
Multifocal
No	60.0	86.9	94.1	96.5	97.6	98.3
Yes	64.2	88.8	95.0	97.1	98.0	98.5
Tumor size
≤1 cm	77.4	93.9	97.4	98.5	99.0	99.2
1-2 cm	61.5	87.7	94.5	96.7	97.8	98.3
2-4 cm	51.2	82.3	91.8	95.1	96.9	97.4
> 4 cm	42.1	76.4	88.6	93.1	95.0	95.9
T stage
T1	75.9	93.3	97.1	98.3	98.9	99.2
T2	62.3	88.0	94.6	96.8	97.5	98.0
T3	34.4	69.9	84.7	90.6	93.3	95.0
T4	9.4	31.6	49.0	65.6	73.3	80.0