Table 1.

Patient demographics, indication and LC case difficulties

	2D			3D			p
	Mean (SD)	Count	Column N (%)	Mean (SD)	Count	Column N (%)
Age	53 (14)			51 (16)			0.679
Gallbladder case difficulty grade
1		17	34		23	46.9	0.991
2		22	44		7	14.3
3		7	14		14	28.6
4		4	8		5	10.2
Sex
Females		34	68		40	81.6	0.119
Males		16	32		9	18.4
Indication for surgery
Biliary colic		26	52		26	54.2	0.397
Cholecystitis		18	36		20	41.7
Gallstone pancreatitis		2	4		2	4.2
Gallbladder polyp		3	6		0
Passed common bile duct stone		1	2		0

As might be expected from the inclusion criteria there were significantly more lower grade cases (p < 0.001)