Table V.

Logistic regression analysis assessing the relationship between post-ERCP pancreatitis and total procedure times in patients stratified by previous post-ERCP pancreatitis or acute pancreatitis

				Post-ERCP pancreatitis (Outcome variable†)
		No. of patients	No. of PEP (%)	Univariate OR (95% CI)	Multivariate OR (95% CI)*
Previous post-ERCP pancreatitis (+)		81
Total procedure time	< 30 min	25	6 (24.0%)	1 (reference)	1 (reference)
	≥ 30 min	56	30 (53.6%)	3.65 (1.33–11.3)	2.79 (0.92–9.18)
	P value			0.01	0.068
Previous acute pancreatitis (+)		52
Total procedure time	< 30 min	23	4 (17.4%)	1 (reference)	1 (reference)
	≥ 30 min	29	13 (44.8%)	3.86 (1.12–15.9)	3.93 (1.11–16.5)
	P value			0.03	0.03
Previous pancreatitis (−)		1201
Total procedure time	< 30 min	416	18 (4.3%)	1 (reference)	1 (reference)
	≥ 30 min	785	44 (5.6%)	0.76 (0.42–1.31)	0.71 (0.39–1.24)
	P value			0.33	0.23

^†0 (absent); 1+ (present).

^*The odds ratio was adjusted for age, sex, suspected SOD, pancreatic duct injection, EST, precut sphincterotomy, pancreatic duct IDUS, bile duct IDUS, pancreatic duct aspiration cytology, bile duct aspiration cytology, pancreatic duct brush cytology, bile duct brush cytology, and EPS. Backward stepwise elimination with a threshold of P = 0.05 was used to select variables for the final models.

EPS: endoscopic pancreatic stenting; ERCP: endoscopic retrograde cholangiopancreatography; EST: endoscopic sphincterotomy; IDUS: intraductal ultrasonography; SOD: sphincter of Oddi dysfunction.

CI, confidence interval; OR, odds ratio.