Table 2.
Within-Subject Reproducibility of Anorectal and Pelvic Floor Motion During Squeeze Assessed by Semi-Automated Method
| Measurements | Maneuver 1 | Maneuver 2 | CCC (95% CI)* |
|---|---|---|---|
| Movement magnitude, Rest to squeeze | 1.54 ± 0.09 | 1.57 ± 0.09 | 0.71 (0.60-0.82) |
| Puborectalis motion component, Rest to squeeze (cm) |
−0.95 ± 0.09 | −0.93 ± 0.09 | 0.80 (0.73-0.88) |
| Pelvic floor motion component, Rest to squeeze (cm) |
−1.05 ± 0.07 | −1.10 ± 0.06 | 0.60 (0.47-0.74) |
| Anorectal angle at rest (°) | 107.3 ± 1.83 | 103.6 ± 1.76 | 0.80 (0.73-0.88) |
| Anorectal angle change during squeeze (°) | −27.62 ± 1.73 | −26.40 ± 1.70 | 0.79 (0.71-0.87) |
| Anorectal junction at rest (cm) a | 2.73 ± 0.13 | 2.77 ± 0.13 | 0.85 (0.79-0.91) |
| Location of bladder base at rest (cm) a | −1.13 ± 0.07 | −1.12 ± 0.08 | 0.89 (0.85-0.93) |
| Bladder base motion during squeeze (cm) a | −0.45 ± 0.05 | −0.51 ± 0.05 | 0.71 (0.61-0.82) |
| Location of vesicourethral junction at rest (cm) a |
−1.11 ± 0.07 | −1.11 ± 0.08 | 0.89 (0.85-0.94) |
| Vesicourethral motion during squeeze (cm) a |
−0.48 ± 0.05 | −0.51 ± 0.05 | 0.68 (0.58-0.80) |
| Pubococcygeal angle at rest (°) | 34.4 ± 1.4 | 34.9 ± 1.5 | 0.88 (0.84-0.93) |
| Pubococcygeal angle change, Rest to squeeze (°) |
−5.02 ± 1.07 | −6.62 ± 1.10 | 0.57 (0.43-0.71) |
| Rotation of AP conjugate (°) | −4.49 ± 0.88 | −4.97 ±0.93 | 0.94 (0.92-0.96) |
| Rotation of obstetric conjugate (°) | −4.02 ± 0.61 | −3.96 ± 0.65 | 0.90 (0.86-0.94) |
| Rotation of anteroposterior outlet (°) | −1.67 ± 6.3 | −1.88 ± 0.69 | 0.90 (0.86-0.94) |
| Rotation of pubococcygeal outlet (°) | −2.02 ± 0.56 | −2.62 ± 0.62 | 0.90 (0.86-0.94) |
Note – Within-subject reproducibility could only be evaluated during squeeze. During evacuation, ultrasound gel was evacuated between maneuvers. Hence, reproducibility could not be assessed.
a
Distances 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) CCC – concordance correlation coefficient