Table 1.

Comparison of Anorectal Motion by Semi-Automated Method and by a Radiologist in Fecal Incontinence Cases and Controls

Semi-Automated Assessmentsa	Cases (N = 64)	Controls (N = 64)
Location of anorectal junction at rest (cm)c	2.7 ± 0.2	2.8 ± 0.1
Anorectal junction motion during squeeze (cm)d	−1.3 ± 0.10	−1.4 ± 0.1
Anorectal junction motion during evacuation (cm)d	3.2 ± 0.2	3.2 ± 0.2
Pelvic floor motion component during squeeze (cm)e	−1.0 ± 0.1	−1.0 ± 0.1
Pelvic floor motion component during evacuation (cm)e	2.6 ± 0.1	2.8 ± 0.1
Puborectalis motion component during squeeze (cm)f	−0.8 ± 0.1	−0.9 ± 0.1
Puborectalis motion component during evacuation (cm)f	1.4 ± 0.1	1.6 ± 0.1
Anorectal angle at rest(°)	108 ± 2	108 ± 2
Anorectal angle change during squeeze (°)	−26 ± 2	−29 ± 2
Anorectal angle change during evacuation (°)	12 ± 3	17 ± 3
Location of bladder base at rest c	−1.1 ± 0.1	−1.1 ± 0.1
Bladder base motion during squeeze (cm)d	−0.4 ± 0.05	−0.5 ± 0.06
Bladder base motion during evacuation (cm) d	3.0 ± 0.2	3.0 ± 0.2
Location of vesicourethral junction at rest c	−1.1 ± 0.1	−0.9 ± 0.1
Vesicourethral motion during squeeze (cm) d	−0.4 ± 0.05	−0.5 ± 0.06
Vesicourethral motion during evacuation (cm) d	2.9 ± 0.2	2.8 ± 0.2
Pubococcygeal angle at rest c	38 ± 1.8	33 ± 1.5
Pubococcygeal angle change during squeeze (°)	−5.5 ± 1.2	−5.3 ± 1.2
Pubococcygeal angle change during evacuation (°)	9.3 ± 1.5	10.7 ± 1.4
Assessments by a Radiologist a
Location of anorectal junction at rest (cm) c	2.8 ± 0.2	2.5 ± 0.1
Anorectal junction motion during squeeze (cm) d	−1.4 ± 0.2	−1.2 ± 0.1
Anorectal junction motion during evacuation (cm) d	2.6 ± 0.2	3.2 ± 0.2
Anorectal angle at rest (°)	101 ± 2	105 ± 2
Anorectal angle change during evacuation (°)	14 ± 3.2	19.6 ± 2.9
Anorectal angle change during squeeze (°)	−24 ± 2.4	−32 ± 2.3
Location of bladder base at rest (cm) c	2.1 ± 0.2	1.4 ± 0.1
Location of vesicourethral junction at rest (cm) c	1.6 ± 0.1	1.4 ± 0.1

^aDistances are measured along the perpendicular line connecting the anorectal junction, bladder base or vesicourethral junction (as appropriate) to the line between the lower border of the pubic symphysis and sacrococcygeal junction. Motion and angle changes are assessed as differences (Rest –evacuation) and (Rest – squeeze)

^bp = 0.01 by paired t test

^cPositive and negative values reflect location below and above pubococcygeal line respectively

^dPositive and negative values reflect movement of anorectal junction away from and toward pubococcygeal line respectively

^ePositive and negative values reflect motion downward and upward perpendicular to the line connecting the anorectal junction and the pubic symphysis respectively

^fPositive and negative values reflect motion away from and towards pubic bone respectively