Table 2.
Anorectal function test results in patients with constipation
| Idiopathic | Neurological | P value | |
|---|---|---|---|
| (n = 100) | (n = 8) | ||
| Anorectal manometry | |||
| MBP (mmHg) (SD) | 53 (18) | 40 (8) | 0.002 |
| MSP (mmHg) (SD) | 38 (19) | 29 (15) | NS |
| SL (cm) (SD) | 3.2 (1.0) | 3.1 (0.9) | NS |
| Strain relaxation | |||
| Yes (%) | 83 (83) | 5 (63) | NS |
| No (%) | 13 (13) | 2 (25) | |
| Paradoxical (%) | 4 (4) | 1 (13) | |
| RAIR | |||
| Yes (%) | 99 (99) | 7 (88) | NS |
| No (%) | 1 (1) | 1 (13) | |
| RAIR (ml) (SD) | 25 (12) | 26 (10) | NS |
| FS (ml) (SD) | 90 (55) | 140 (76) | 0.06 |
| Urge (ml) (SD) | 168 (79) | 194 (80) | NS |
| MTV (ml) (SD) | 235 (92) | 264 (60) | NS |
| Anal endosonography | |||
| Defect (%) | 28 (28) | 4 (50) | NS |
| Haemorrhoidal tissue (%) | 25 (25) | 0 | NS |
| Atrophy (%) | 13 (13) | 0 | NS |
| Internal sphincter hypertrophy (%) | 0 | 0 | NS |
SD standard deviation, MBP maximum basal pressure, MSP maximum squeeze pressure, SL sphincter length, RAIR rectoanal inhibitory reflex, FS first sensation volume, MTV maximum tolerable volume, NS not significant