Table 1.

Clinical characteristics of the 230 patients

	Ordinary group		New group		P
	N	%	N	%
Gender
Male	89	59.3	46	57.5
Female	61	40.7	34	42.5	0.888
Age (Years)	65.9 ± 14.5		62.5 ± 12.3		0.072
Major primary disease
Choledocholithiasis	87	58.0	50	62.4	0.573
Sphincter stenosis	15	10.0	5	6.3	0.463
SOD	10	6.7	6	7.5	0.792
Periampullary diverticula	18	12.0	11	13.8	0.683
Pancreaticobiliary maljunction	11	7.3	5	6.3	1.000
Duodenal papillitis	9	6.0	3	3.7	0.550