Number of Endoscopic Retrograde Cholangiopancreatography Procedures Required for Short Biliary Cannulation Time

Table 6

The reason for long cannulation time in patients with malignant biliary stricture due to pancreatic cancer.

	Group L ()	Group S ()	Two-tailed value	Odds ratio	95% CI
Bending of the lower bile duct to the pancreatic cancer, n (%)	8 (30.7)	5 (15.6)	0.169^a	2.400	0.676–8.517
Malignant stricture of the distal end of the lower bile duct, n (%)	7 (26.9)	6 (18.7)	0.458^a	1.596	0.462–5.520
Tumor invasion in the gastroduodenal tract, n (%)	7 (26.9)	7 (21.8)	0.655^a	1.316	0.394–4.393
Poor endoscope operability in the duodenum, n (%)	8 (30.7)	6 (18.7)	0.287^a	1.926	0.570–6.505

CI: confidence interval; ^aChi-square test.