A Study on Central Lymph Node Metastasis in 543 cN0 Papillary Thyroid Carcinoma Patients

Table 4

Risk factors in PTC patients with tumor size <0.25 cm and ≥0.25 cm.

	Tumor size <0.25 cm (26)		Tumor size ≥0.25 cm (517)
Risk factors	CLN
	Positive	Negative	Positive	Negative
Gender
Female	2	17	142	249
Male	0	7	63	63
Age (years)
45	1	9	101	108
45	1	15	104	204
Bilaterality
Yes	2	3	59	70
No	0	21	146	242
Extrathyroidal extension
Yes	0	0	22	14
No	2	24	183	298