Table 1 Baseline features of breast fibroadenomas treated with 1 session (group 1) or with 2 sessions (group 2) of HIFU

Age (years), mean ± SD

29.4 ± 10.8

26.6 ± 9.2

0.549^a

BMI (kg/m²), mean ± SD

20.5 ± 3.4

20.0 ± 2.1

0.693^a

 left

6 (31.6)

3 (42.9)

0.945^b

 right

13 (68.4)

4 (57.1)

 up-out

8 (42.1)

2 (28.6)

0.454^b

 up-in

6 (31.6)

3 (42.9)

 low-in

3 (15.8)

0 (0.0)

 low-out

2 (10.5)

2 (28.6)

Depth (mm), mean ± SD

15.3 ± 3.9

15.9 ± 3.6

0.710^a

Basal volume (mL), median (range)

1.82 (0.35–5.95)

8.14 (1.53–10.39)

0.0140^c

 0

8 (42.1)

2 (28.5)

0.194^b

 I

8 (42.1)

1 (14.3)

 II

2 (10.5)

3 (42.9)

 III

1 (5.3)

1(14.3)