Endoscopic papillary large balloon dilatation with sphincterotomy is safe and effective for biliary stone removal independent of timing and size of sphincterotomy

Table 2 Outcome of index endoscopic retrograde cholangiopancreatography by stone characteristics and anatomical features of the biliary tree n (%)

Variables	Group A (n = 166)	Group B (n = 63)	P value
Number of stones	2 (1-13)	3 (1-12)	0.006
Median diameter of stones (mm)	12.4 (4.5-30)	17.4 (10.1-32)	< 0.000001
Median diameter of duct (mm)	12.4 (5-30)	18.3 (9.2-30)	0.001
Ampullary or peri-ampullary diverticulum	37 (22.3)	10 (15.9)	0.370
Intact GB	117 (70.5)	50 (79.4)	0.240
Primary stone disease	118 (71.1)	44 (69.8)	0.980
Recurrent stone disease1	48 (28.9)	19 (30.2)	0.900

¹Recurrent stones were after previous EST.