Parameters That May Be Used for Predicting Failure during Endoscopic Retrograde Cholangiopancreatography

Table 5

Distribution of the predicted relative risk (PRR) and confidence intervals (CIs) for the factors influencing cannulation in the multiple-variable analysis (logistic regression using the backward LR method).

	PRR		95% confidence interval
			Minimum	Maximum
Factors
𝑃=0.002	Age	1.01	1.004	1.016
𝑃=0.386	Gender	1.086	0.901	1.309
𝑃<0.000	History of previous upper abdominal surgery	0.467	0.357	0.663
Additional findings
𝑃=0.000	Periampullary tumor infiltrating the ampulla	78.060	35.426	172.001
𝑃=0.000	Problem in GIT passage	29.190	15.413	55.282
𝑃=0.001	Peptic ulcer	3.457	1.687	7.085
Endoscopist
	Endoscopist 1
𝑃=0.000	Endoscopist 2	0.550	0.419	0.722
𝑃=0.004	Endoscopist 3	0.684	0.529	0.883
𝑃=0.389	Endoscopist 4	0.897	0.700	1.149