Causes associated with recurrent choledocholithiasis following therapeutic endoscopic retrograde cholangiopancreatography: A large sample sized retrospective study

Table 4 Common bile duct-related factors compared between the recurrence group and control group

Variable	Recurrence group (n = 477)	Control group (n = 477)	OR (95%CI)	P-value
Gallstones (Y/N)	274/203	272/205	1.017 (0.787-1.315)	0.896
Intrahepatic bile duct stones (Y/N)	133/344	60/417	2.687 (1.919-3.762)	0.000
Ectopic duodenal papilla (Y/N)	3/462	1/476	3.091 (0.32-29.822)	0.329
Duodenal ulcers (Y/N)	21/443	26/451	0.822 (0.456-1.483)	0.516
PAD (Y/N)	188/276	142/335	1.607 (1.227-2.105)	0.001
Bile duct angle (Y/N)	36/429	25/452	1.517 (0.896-2.570)	0.121
CBD diameter (cm), mean ± SD	1.27±0.73	1.01±0.55	1.988 (1.589-2.486)	0.000
Choledocholithiasis diameter ≥ 10 mm (Y/N)	229/134	126/236	1.580 (1.202-2.067)	0.001
Number of stones (n), (mean ± SD)	1.90 ± 1.19	1.82 ± 1.02	1.12 (0.992-1.265)	0.067
Biliary tract infections (Y/N)	46/418	20/457	2.515 (1.463-4.321)	0.001
Bile-duct duodenal fistula (Y/N)	22/442	10/467	2.324 (1.088-4.964)	0.029
CBD stenosis (Y/N)	51/413	33/444	1.661 (1.051-2.626)	0.030

PAD: Periampullary diverticula; CBD: Common bile duct; Y: Yes; N: No.