Table 4 Determinants of abnormal rectal balloon evacuation using multivariable logistic regression with forward elimination

 Rectoanal pressure gradient on simulated defecation

1.010 (1.001–1.020)

0.03

 Maximum tolerated volume

0.993 (0.988–0.998)

0.007

 Duration of sustained squeeze

0.954 (0.899–1.012)

0.12

 Rectoanal pressure gradient on simulated defecation

1.032 (1.009–1.057)

0.009

 Residual anal pressure

1.020 (0.993–1.047)

0.16

 Rectoanal pressure gradient on simulated defecation

0.996 (0.981–1.012)

0.64

 Maximum tolerated volume

0.988 (0.981–0.996)

0.004

 Mean resting sphincter pressure (Anal tone)

0.968 (0.939–0.998)

0.034

 Max squeeze sphincter pressure (Anal contractility)

1.008 (0.998–1.018)

0.14