Table 1.

ERCP clinical indications.

Indications	Group A	Group B	Total	%
CBD stones	66	20	86	56.2
Postoperation leakage	5	1	6	3.90
Cholangitis	4	7	11	7.2
Malignant tumors	22	6	28	18.3
Benign CBD stricture	1	3	4	2.6
Stent removal or exchange	4	2	6	3.9
Others	9	3	12	7.8
Total	111	42	153	100