Table 4. Evaluation of Patients with and Without Central Lymph Node Metastasis in Terms of Age, Tumor Diameter and Lymph Node Status .

Patients	Node-Negative (Mean, Range)	Node-Positive (Mean, Range)	U value	P Value	Cohen’s Effect Size
Age (y)	39 (31−68)	34 (18−69)	5993.5	< 0.001	0.38
Tumor diameter (mm)	9 (1−35)	13 (3−60)	4471.0	< 0.001	0.74
Multifocality	1 (1−5)	1 (1−21)	7016.5	0.040	0.30
Total lymph node number	6 (4−26)	8 (4−26)	6559.0	0.011	0.29
Metastatic lymph node number	0	3 (1−17)	0	< 0.001	1.67