Table 2.

Results of Anorectal Manometry [Median (Range)]

First
Manometry
(n = 91)
Last
Manometry
(n = 91)
Anal sphincter resting
pressure (mm Hg)
50 (24–86)53 (25–103)
Maximum squeeze
pressure (mm Hg)
150 (42–370)163 (65–411)*
Threshold for urge (mL)50 (5–300)40 (5–300)
Critical volume (mL)150 (60–360)150 (20–300)
Normal defecation dynamics28%38%
  • * P < .01; between first and last manometry; Wilcoxon rank sum test.

  • P = .05; between first and last manometry; McNemar's test.