Table 1. Clinical features of the study population.

Features		Benign	Malignant	P value
Sex	Male	15	28	0.60
	Female	71	106
Age (year)		48.78 ± 13.89	42.41 ± 12.94	0.002
Diameter (cm)		1.66 ± 0.90	1.06 ± 0.58	0.000
FT3 (pmol/L)		4.73 ± 0.63	4.90 ± 1.27	0.94
FT4 (pmol/L)		16.06 ± 2.97	17.52 ± 4.75	0.04
TSH (mIU/L)		2.43 ± 1.89	3.23 ± 9.75	0.62

Data are presented as mean (SEM).