Table 2.

Comparison of risk of readmission between biliary-stent and no-stent groups in patients with cholelithiasis and choledocholithiasis after ERCP and biliary sphincterotomy on index admission

	No biliary stent placement	Biliary stenting	Adjusted HR	95% CI	P value
30-day readmission
All biliary events	1191 (.67)	706 (1.18)	1.78	1.55-2.04	<.001
Choledocholithiasis	445 (.25)	238 (.39)	1.65	1.31-2.07	<.001
Cholecystitis	528 (.3)	296 (.49)	1.64	1.34-2.0	<.001
Cholangitis	114 (.06)	93 (.15)	2.36	1.6-3.49	<.001
Gallstone pancreatitis	103 (.05)	79 (.13)	2.35	1.51-3.67	<.001
60-day readmission
All biliary events	1671 (1.04)	1151 (2.12)	2.04	1.82-2.28	<.001
Choledocholithiasis	576 (.35)	349 (.64)	1.85	1.53-2.23	<.001
Cholecystitis	829 (.51)	529 (.97)	1.83	1.56-2.14	<.001
Cholangitis	157 (.09)	179 (.32)	3.31	2.4-4.57	<.001
Gallstone pancreatitis	109 (.06)	94 (.17)	2.68	1.77-4.04	<.001
90-day readmission
All biliary events	1832 (1.27)	1294 (2.66)	2.07	1.86-2.30	<.001
Choledocholithiasis	609 (.42)	394 (.8)	1.92	1.61-2.30	<.001
Cholecystitis	932 (.64)	617 (1.26)	1.9	1.64-2.2	<.001
Cholangitis	187 (.12)	188 (.38)	2.89	2.13-3.92	<.001
Gallstone pancreatitis	104 (.07)	94 (.19)	2.78	1.83-4.23	<.001

CI, Confidence interval; HR, hazard ratio.