Table 2 Anorectal HRAM parameters in 30 healthy participants according to participant sex

Functional anal canal length (cm)

3.6 (0.5)

3.2–4.8

3.1 (0.5)

2.4–4.0

< 0.01

Anal pressure

Maximum resting pressure (mm Hg)

73.4 (11.0)

52.3–92.8

57.6 (11.9)

40.2–78.8

< 0.01

Maximum squeezing pressure (mm Hg)

193.8 (65.5)

120.8–352.4

142.2 (44.6)

78.3–245.3

< 0.01

Maximum coughing pressure (mm Hg)

139.4 (48.8)

42.1–228.4

112.3 (28.6)

66.1–175.2

0.03

Maximum strain pressure (mm Hg)

95.6 (36.9)

44.2–168.0

72.7 (32.9)

38.6–168.6

0.04

Defecation index

2.0 (0.7)

1.3–3.7

2.3 (1.2)

1.3–4.8

0.78

Threshold volume to elicit RAIR (mL)

18.0 (5.6)

10–30

16.0 (5.1)

10–20

0.16

Rectal sensation

First sensation (mL)

22.7 (7.0)

10–40

16.7 (7.2)

10–30

0.01

Desire to defecate (mL)

49.3 (14.4)

30–90

44.0 (11.2)

30–70

0.13

Urge to defecate (mL)

225.3 (66.1)

120–350

216.7 (64.8)

120–360

0.36