Table 1 Basic characteristics and ultrasound features of the patients.

Mean age (y, range)

56.16 ± 9.43 (34–81)

57.87 ± 12.52 (26–87)

0.352

Lesion size ( mm, range)

31.16 ± 16.02 (9–84)

23.43 ± 15.30 (6–86)

0.002*

Lesion position

0.599

 Right/left, n (%)

28 (43.8)/36 (56.2)

47 (48.0)/51 (52.0)

Lesion shape

0.368

 Regular/irregular, n (%)

5 (7.8)/59 (92.2)

12 (12.2)/86 (87.8)

Margin

0.616

 Circumscribed/not circumscribed, n (%)

22 (34.4)/42 (65.6)

30 (30.6)/68 (69.4)

Homogeneous echo

0.536

 Yes/no, n (%)

13 (20.3)/51 (79.7)

24 (24.5)/74 (75.5)

Posterior acoustic features

0.273

 Absent/present, n (%)

37 (57.8)/27 (42.2)

65 (66.3)/33 (33.7)

Microcalcifications in a lesion

0.241

 Absent/present, n (%)

38 (38.8)/26 (26.5)

67 (68.4)/31 (31.6)

Taller than wide shape

<0.001*

 No/yes, n (%)

14 (21.9)/50 (78.1)

65 (66.3)/33 (33.7)

Internal flow

<0.001*

 Poor/rich, n (%)

22 (34.4)/42 (65.6)

73 (74.5)/25 (25.5)