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

Table 5

The relationship between the ERCP experience and cannulation success rate without operator change.

	Cannulation success without operator change, n (%)	Two-tailed value	Odds ratio	95% CI
ERCP experience		0.000^a
21–100	55 (59.7)	0.000^a	0.109	0.048–0.250
101–200	129 (86.0)	0.082^a	0.473	0.201–1.117
201–300	94 (86.2)	0.085^a	0.460	0.187–1.133
301–400	61 (93.8)	1.000^b	1.119	0.324–3.870
401–500	22 (95.6)	1.000^b	1.615	0.192–13.570
>500	109 (93.1)		1

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