| RAIR | SSc mean (95% CI) | IC mean (95% CI) | p Value |
| % Relaxation | 42 (33 to 52) | 47.2 (37 to 58) | NS |
| Latency | 2.4 (1.5 to 3.2) | 1.4 (1.0 to 1.7) | <0.03 |
| Recovery time | 11.6 (7 to 16.2) | 6.5 (4.1 to 8.8) | NS |
| Duration | 19.2 (13.7 to 24.6) | 11.2 (8.7 to 13.7) | 0.02 |
IC, incontinent controls; RAIR, rectoanal inhibitory reflex; SSc, systemic sclerosis.