Assessment of pain at 24 months in patients treated with either endoscopic sphincterotomy (ES) or a sham procedure
| Number | Improved | No change | p Value | |
| SO stenosis | ||||
| Sham | 13 | 5 | 8 | 0.041 |
| ES | 13 | 11 | 2 | |
| SO dyskinesia | ||||
| Sham | 10 | 5 | 5 | 0.670 |
| ES | 11 | 4 | 7 | |
| Normal manometry | ||||
| Sham | 19 | 8 | 11 | 0.473 |
| ES | 13 | 8 | 5 | |
Patients with resolution of their pain are included in the improved group. SO, sphincter of Oddi.