Table 3.
Comparison of anorectal pressures measured with the biofeedback catheter in women and men†
| Variable | Women, n | Men, n | Women Mean ± SD (10th, 90th percentile) |
1st, 3rd quartile | Men Mean ± SD (10th, 90th percentile) |
1st, 3rd quartile | P-value |
|---|---|---|---|---|---|---|---|
| Anal resting pressure | 52 | 31 | 66 ± 21 (37, 94) | 53, 79 | 72 ± 17 (48, 95) | 63, 83 | 0.21 |
| Anal squeeze pressure‡ | 52 | 31 | 152 ± 57 (71, 219) | 118, 188 | 227 ± 100 (140, 359) | 177, 264 | <0.0001 |
| Anal squeeze increment‡,§ | 52 | 31 | 80 ± 44 (30, 141) | 51, 110 | 154 ± 96 (67, 275) | 84, 182 | <0.0001 |
| BET (sec) | 52 | 31 | 17 ± 13 (5, 35) | 7, 23 | 13 ± 11 (5, 25) | 6, 16 | 0.17 |
| Evacuation with rectal distention | |||||||
| Rectal pressure | 32 | 20 | 39 ± 29 (12, 72) | 15, 55 | 58 ± 37 (16, 117) | 32, 69 | 0.08 |
| Anal pressure | 37 | 22 | 63 ± 24 (39, 90) | 50, 80 | 77 ± 36 (44, 105) | 59, 88 | 0.10 |
| Rectoanal gradient | 32 | 20 | −26 ± 34 (−69, 5) | −42, −11 | −26 ± 35 (−70, 15) | −52, −9 | 0.95 |
| Anal relaxation (%) | 37 | 22 | 3 ± 60 (−35, 31) | −24, 8 | −20 ± 48 (−51, 21) | −36, 1 | 0.13 |
| Defecation index¶ | 36 | 21 | 0.27 ± 1.14 (−0.11, 1.04) | 0.09, 0.71 | 0.69 ± .67 (0.00, 1.16) | 0.33, 0.84 | 0.18 |
| Valsalva without rectal distention | |||||||
| Anal Pressure | |||||||
| Rectal sensation | |||||||
| First sensation (mL) | 52 | 30 | 33 ± 16 (20, 60) | 20, 40 | 36 ± 18 (20, 61) | 20, 50 | 0.56 |
| Desire to defecate (mL) | 52 | 30 | 81 ± 37 (40, 130) | 50, 100 | 82 ± 33 (49, 121) | 60, 100 | 0.73 |
| Urgency (mL) | 52 | 30 | 117 ± 39 (61, 180) | 98, 150 | 128 ± 36 (97, 180) | 100, 158 | 0.20 |
| Pain (mL) | 41 | 22 | 135 ± 37 (80, 180) | 100, 170 | 150 ± 32 (101, 180) | 125, 180 | 0.15 |
†
Values are mmHg unless stated otherwise.
‡
These values are derived from the squeeze maneuver with the highest squeeze pressure;
§
Squeeze increment is (anal squeeze pressure – anal resting pressure).
¶
No unit.