Table 1 Comparison of HFI and MRW groups in 3D HRAM parameters

Rest

 Maximum resting pressure (mmHg)

69.71 ± 17.76

99.00 ± 22.71

4.18(-37.56~-21.03)

0.00

 Mean resting pressure (mmHg)

61.60 ± 15.56

87.32 ± 23.36

3.56(-32.75~-18.67)

0.00

 HPZ length (cm)

3.48 ± 0.65

3.71 ± 0.68

0.12(-0.46~0.00)

0.05

Squeeze

 Maximum squeezing pressure (mmHg)

169.14 ± 64.14

189.23 ± 49.88

9.24(-38.38~-1.81)

0.03

 Duration of sustained squeeze (s)

14.46 ± 5.60

16.63 ± 5.35

0.97(-4.09~0.25)

0.03

Simulated defecation

 Residual anal pressure (mmHg)

64.27 ± 27.66

85.61 ± 31.59

5.28(-31.79~-10.89)

0.00

 Anal relaxation rate (%)

26.80 ± 17.44

29.43 ± 28.29

4.22(-10.98~5.73)

0.54

 Intrarectal pressure (mmHg)

41.12 ± 26.20

51.50 ± 22.42

4.30(-18.89~-1.88)

0.02

 Rectoanal pressure differential (mmHg)

-19.40 ± 48.00

-38.10 ± 36.99

7.53(3.81~33.60)

0.01

Graded balloon distension

 Anorectal inhibitory reflex

16.17 ± 9.40

22.62 ± 9.15

1.64(-10.02~-3.52)

0.00

 First sensation (cc)

38.17 ± 16.21

36.76 ± 19.66

3.21(-4.95~7.75)

0.66

 Urge to defecate (cc)

88.33 ± 32.32

78.09 ± 36.74

6.15(-1.93~22.42)

0.10

 Maximum tolerated volume (cc)

142.03 ± 35.03

136.91 ± 36.95

9.76(-28.82~9.99)

0.37

Defecation index

0.63 ± 0.62

0.68 ± 0.40

0.09(-0.30~0.07)

0.63