Table 3.

Clinical characteristics of patients and ultrasound features of thyroid nodules.

Characteristics		Benign (160)	Malignancy (114)	χ2/Z value	P value
Sex	Male	20 (52.6%)	18 (47.4%)	0.603	0.437
	Female	140 (59.3%)	96 (40.7%)
Age		53 (46.25, 58.75)	40 (32, 51)	2.524	<0.001
Size (mm)		18.55 (11.5, 31.68)	13.1 (9.08, 19)	33.107	<0.001
Location	Isthmus	3 (50%)	3 (50%)	0.222	0.895
	Left	77 (59.2%)	53 (40.8%)
	Right	80 (58%)	58 (42%)
Number	Sigle	11 (31.4%)	24 (68.6%)	12.009	0.001
		149 (62.3%)	90 (37.7%)
Structure	Solid	62 (43.7%)	80 (56.3%)	27.407	<0.001
	Mainly solid	85 (72.6%)	32 (27.4%)
	Mainly Cystic	13 (86.7%)	2 (13.3%)
Hypoechoic	Present	59 (41.3 %)	84 (58.7%)	36.148	<0.001
	Absent	101 (77.1%)	30 (22.9%)
Margins	Regular	129 (78.2%)	36 (21.8%)	66.846	<0.001
	Irregular	31 (28.4%)	78 (71.6%)
Taller-than-wide shape	Present	5 (22.73%)	17 (77.3%)	12.525	0.001
	Absent	155 (61.5%)	97 (38.5%)
Calcification	Micro	23 (23.2%)	76 (76.8%)	78.88	<0.001
	Macro	36 (60%)	24 (40%)	0.082	0.775
	Comet tail-like	35 (63.6%)	20 (36.4%)	0.778	0.378
Halo	Regular	35 (87.5%)	5 (12.5%)	16.332	<0.001
	Irregular	2 (33.3%)	4 (66.7%)	1.586	0.238
Echotexture	Homogeneous	31 (66%)	16 (34%)	1.336	0.248
	Heterogeneous	129 (56.8%)	98 (43.2%)
Posterior echo attenuation	Present	13 (29.5%)	31 (70.5%)	17.956	<0.001
Attenuation	Absent	147 (63.9%)	83 (36.1%)