Table 4.

Interventions during one year prior to index (cholecystectomy) stay, no = 43072.

Interventions	Open cholecystectomy n = 11928		Laparoscopic cholecystectomy n = 31144
Procedure	Patients	%	Patients	%	p-values
Sphincterotomy	510*	4.3	782**	2.5	< 0.001
Other open procedures	36	0.3	22	0.1	< 0.001
Other laparoscopic procedures	4	0.0	2	0.0	0.094
Other endoscopic procedures	414	3.5	497	1.6	< 0.001
Percutaneous procedures	15	0.1	3	0.0	< 0.001

* including 20 patients with sphincterotomy more than once

** including 15 patients with sphincterotomy more than once