Table 2 The comparison of baseline characters based on the ultrasound findings

Age

56.2

8.9

45.1

12.5

0.033*

Sex

Male

6

100.0%

24

52.2%

0.026**

Female

0

0.0%

22

47.8%

Side

Right

2

33.3%

15

32.6%

0.85**

Left

2

33.3%

20

43.5%

Both cords

2

33.3%

11

23.9%

Site of lesion

Not applicable

6

100.0%

0

0.0%

0.0001**

Anterior third

0

0.0%

23

50%

Middle third

0

0.0%

16

34.8%

Anterior and middle thirds

0

0.0%

5

10.9%

Posterior third

0

0.0%

2

4.3%