From: Risk factors for adverse events associated with endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy: a retrospective study
Variable
OR (95% CI)
P value
Multiple cannulation attempts
5.283 (1.088, 25.659)
0.039
Endoscopic papillary balloon dilation
4.381 (1.191, 16.114)
0.026
Biopsy in the bile duct or papilla
35.432 (2.693, 466.104)
0.007