Table 3 Comparison of morphology and function of levator ani muscle

LAM injury (%)

None

63.5 (33/52)

92.2 (47/51)

100 (30/30)

< 0.001^*

Minor

32.7 (17/52)

7.8 (4/51)

0

Major

3.8 (2/52)

0

0

LHA (mm²)

Rest

1339.9 ± 272.6^a,b

1136.2 ± 231.8

1107.6 ± 156.1

< 0.001^*

Strain

2552.7 ± 924.6^a,b

1719.7 ± 617.7^b

1292.9 ± 204.2

< 0.001^*

H-line (mm)

Rest

56.4 ± 8.0

56.1 ± 8.6

57.2 ± 6.5

0.824

Strain

60.0 ± 13.0

57.5 ± 11.0

57.1 ± 8.6

0.413

M-line (mm)

Rest

24.9 ± 6.1^b

23.8 ± 6.7^b

17.7 ± 5.2

< 0.001^*

Strain

33.9 ± 10.1^b

30.5 ± 9.1^b

22.4 ± 7.7

< 0.001^*

B-PCL (mm)

Rest

7.8 ± 5.7

9.7 ± 3.9

10.7 ± 5.3

0.105

Strain

−11.0 ± 5.9^a,b

−2.9 ± 8.2

1.6 ± 8.6

< 0.001^*

U-PCL (mm)

Rest

15.3 ± 9.0

15.3 ± 7.8

14.3 ± 5.2

0.807

Strain

−3.6 ± 8.2^a,b

2.7 ± 9.4

1.6 ± 8.6

< 0.001^*

LPA (°)

Rest

46.8 ± 7.2

45.3 ± 8.0

44.8 ± 8.2

0.453

Strain

52.0 ± 11.3

48.5 ± 9.2

48.1 ± 9.1

0.089