Table 5. Multivariate analysis for post-ERCP cholecystitis.

ERCP, endoscopic retrograde cholangiopancreatography; CT, computed tomography; CI, confidence interval; HU, Hounsfield units

	Post-ERCP cholecystitis n=8	Non-post-ERCP cholecystitis n=199	Univariate analysis, p-value	Multivariate analysis, p-value	Odds ratio	95% CI
Age (years), median (range)	88 (76-91)	80.5 (33-102)	0.075
Gallbladder stone	4 (50.0%)	105 (53.3%)	>0.99
Gallbladder concentration (CT >10 HU)	6 (75.0%)	78 (39.4%)	0.065
Gallbladder concentration (CT >20 HU)	3 (37.5%)	22 (11.1%)	0.059
History of acute pancreatitis	0 (0%)	11 (5.6%)	>0.99
Resistance against antibiotics	5 (62.5%)	45 (22.7%)	0.022	0.021	6.48	1.33–31.6
Biliary duct metallic stent	5 (62.5%)	21 (10.6%)	<0.001	<0.001	15.6	3.23–75.7
Tumor involvement to the orifice of the cystic duct	1 (12.5%)	13 (6.6%)	0.436
Common bile duct diameter	4 (50.0%)	95 (48.0%)	>0.99