Table 3 Inter-group comparison of levator hiatus areas in resting, constrictive anal and maximum Valsalva states (\(\:\stackrel{-}{x}\) ± s).

From: Clinical value of transperineal ultrasound in evaluating the effects of different delivery methods on the primipara pelvic floor structure and function

Group

Number of cases

Area(cm2)

Resting state

Constrictive anal state

Maximum Valsalva state

Vaginal delivery group

52

14.41 ± 1.35

11.40 ± 1.02

21.18 ± 2.74

Cesarean delivery group

40

12.80 ± 1.52

9.87 ± 0.64

16.77 ± 2.51

t

 

5.378

8.265

7.925

P

 

<0.001

<0.001

<0.001

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