Prediction of Cervical Lymph Nodes Metastasis in Papillary Thyroid Carcinoma (PTC) Using Nodal Staging Score (NSS)
Table 1
Basic information of the patients and the number of examined lymph nodes.
The number of patients (%)&
value
The number of examined lymph nodes
Total ()
The median
IQR#
Gender
<0.05
Male
2886(23.2)
1825(30.6)
1061(16.4)
3
1(-10)
Female
9545(76.8)
4134(69.4)
5411(83.6)
2
1(-6)
Age (years old)
<0.05
≤45
7127(57.3)
3706(62.2)
3421(52.9)
3
1(-7)
>45
5304(42.7)
2253(38.7)
3051(47.1)
2
1(-5)
Extrathyroidal invasion
<0.05
Negative
9496(76.4)
3752(63.0)
5744(88.8)
2
1(-5)
Positive
2935(23.6)
2207(37.0)
728(11.2)
4
2(-12)
Multifocal
<0.05
No
8431(67.8)
4157(69.8)
4274(66.0)
3
1(-7)
Yes
4000(32.2)
1802(30.2)
2198(34.0)
2
2(-3)
Tumor size
<0.05
≤1 cm
3517(28.3)
1137(19.1)
2380(36.8)
2
1(-4)
1–2 cm
3803(30.6)
1817(30.5)
1986(30.7)
2
1(-6)
2–4 cm
3190(25.7)
1780(29.9)
1410(21.8)
3
1(-7)
> 4 cm
1062(8.5)
683(11.5)
379(5.9)
4
1(-12)
T stage
<0.05
T1
6121(49.2)
2072(34.8)
4049(62.6)
2
1(-5)
T2
2237(18.0)
1060(17.8)
1177(18.2)
2
1(-6)
T3
3146(25.3)
2094(35.1)
1052(16.3)
3
1(-10)
T4
927(7.5)
733(12.3)
194(3.0)
4
2(-14)
Note: Tumor size data were not available for 859 (6.9%) of these patients; #IQR refers to interquartile range; &: In the number of patients, LN+ indicates patients with positive lymph node metastasis, and LN- indicates patients with negative lymph node metastasis.
