TABLE 4.
Manometric and RST parameters pre and post BF in responder (N = 81) and nonresponder (N = 50) groups. For all RST parameters and the push rectal pressure, there was a significant improvement after BF therapy in responders' group. Statistics: Mean (SD).
| Manometric parameters | Response to BF | Before BF | After BF | p‐Value b |
|---|---|---|---|---|
| First sensation (mL) | Responders | 24.57 (9.62) | 19.14 (6.56) | <0.01 |
| NonResponders | 24 (9.48) | 21.8 (8.25) | 0.017 | |
| p‐Value a | 0.725 | 0.063 | ||
| Defecation threshold (mL) | Responders | 78.75 (31.6) | 53.47 (13.43) | <0.01 |
| NonResponders | 82.29 (37.88) | 66 (23.56) | <0.01 | |
| p‐Value a | 0.781 | <0.01 | ||
| Maximum tolerated volume (mL) | Responders | 238.89 (81) | 211.72 (38.95) | <0.01 |
| NonResponders | 236 (86.33) | 232 (57.82) | 0.628 | |
| p‐Value a | 0.911 | 0.076 | ||
| RAIR elicited (mL) | Responders | 17.77 (6.32) | 17.03 (5.1) | 0.095 |
| NonResponders | 17.2 (7.01) | 16.4 (5.63) | 0.072 | |
| p‐Value a | 0.5 | 0.453 | ||
| Push rectal pressure (mmHg) | Responders | 64.62 (31.41) | 94.35 (13.65) | <0.01 |
| NonResponders | 69.94 (22.47) | 78.28 (20.79) | <0.01 | |
| p‐Value a | 0.228 | <0.01 | ||
| Push anal pressure (mmHg) | Responders | 66.11 (24.48) | 37.25 (9.48) | <0.01 |
| NonResponders | 51.84 (23.12) | 46.04 (19.32) | 0.21 | |
| p‐Value a | <0.01 | 0.03 | ||
| Anal resting pressure (mmHg) | Responders | 62.35 (11.6) | 61.01 (11.9) | 0.023 |
| NonResponders | 58.96 (10.88) | 58.32 (10.04) | 0.144 | |
| p‐Value a | 0.135 | 0.158 |
Abbreviations: BF, biofeedback; RAIR, recto‐anal inhibitory reflex; RST, rectal sensory testing; SD, standard deviation.
a
Mann‐Whitney Test between groups at T0 and at T1.
b
Wilcoxon Test between T0 and T1 in responders and nonresponders groups.