Table 2.

Therapeutic maneuvers performed on Group I and II

		Group I	Group II	P
Sphincterotomy	Yes	17	22	0.69
	No	22	24
Common bile duct stone extraction	Yes	9	5	0.13
	No	30	41
Biliary plastic stent	Yes	14	24	0.18
	No	25	22
Biliary metallic stent	Yes	6	3	0.29
	No	33	43
Pancreatic plastic stent	Yes	0	3	0.24
	No	39	43
Endoscopic therapy	Not necessary	8	1	0.006
	Necessary	31	45