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

Table 2

Univariate analysis of the factors affecting biliary cannulation time.

Factor	Group L ()	Group S ()	Two-tailed value	Odds ratio	95% CI
ERCP experience, n			0.013^a
21–100	39	50	0.000^a	3.018	1.622–5.616
101–200	49	94	0.016^a	2.017	1.136–3.581
201–300	33	69	0.049^a	1.851	0.995–3.434
301–400	16	47	0.458^a	1.317	0.635–2.732
401–500	6	16	0.571^b	1.451	0.511–4.123
>500	23	89		1
Diagnostic ERCP, n	23	66	0.227^a	0.729	0.435–1.219
Acute cholangitis, n	17	49	0.303^a	0.736	0.410–1.321
Juxtapapillary diverticula, n	36	101	0.144^a	0.724	0.469–1.118
Papilla on the rim of the diverticulum, n	8	13	0.491^a	1.371	0.557–3.374
Malignant biliary stricture, n	50	87	0.037^a
Biliary cancer, n	17	48	0.572^a	0.843	0.465–1.527
Pancreatic cancer, n	27	32	0.013^a	2.008	1.151–3.501
The other cancerous lesions, n	6	7	0.224^b	2.039	0.671–6.199
None, n	116	276		1
Tumor invasion in the gastroduodenal tract, n	6	13	0.976^a	1.015	0.379–2.720
Bile duct stone impaction at the papilla, n	5	26	0.061^a	0.405	0.153–1.074

ERCP: endoscopic retrograde cholangiopancreatography; CI: confidence interval; ^aChi-square test; ^bFisher’s exact test.