Table 1.

Primary diagnosis at index (cholecystectomy) stay, n = 44084

	Open cholecystectomy n = 12675		Laparoscopic cholecystectomy n = 31409		p-value*
	n	%	n	%
Gallbladder disease	11363	89.6	30409	96.8
Bile duct disease	192	1.5	113	0.4
Acute pancreatitis	373	2.9	622	2.0
Other diagnoses	747	5.9	265	0.8
					< 0.001

*calculated with the chi-square test