Table 1 Baseline characteristics

Patients, n

93

Age, mean (SD), years

66.3 (± 12.0)

Sex (male/female), n

68/25

Prior cholecystectomy, n (%)

27 (29.0)

Reconstruction method, n (%)

Billroth-I gastrectomy

8 (8.6)

Billroth-II gastrectomy

66 (71.0)

Roux-en-Y gastrectomy

3 (3.2)

Hepaticojejunostomy with Roux-en-Y

3 (3.2)

Pancreaticoduodenectomy

13 (14.0)

Indications for ERCP, n (%)

Choledocholithiasis

74 (61.2)

Hepatolithiasis

10 (8.3)

Pancreatolithiasis

4 (3.3)

Benign biliary obstruction

5 (4.1)

Malignant biliary obstruction

23(19.0)

Anastomotic stenosis

5 (4.1)

Presence of diverticulum, n (%)

14 (15.1)

Presence of native papilla, n (%)

78 (83.9)

With a transparent hood, n (%)

78 (64.5)