Table 2.

Factors associated with conversion to open surgery

	Bivariate analysis		Multivariate analysis
	OR(CI)	P value	OR(CI)	P value
Sex(referent: male sex)	0.65(0.39–1.11)	0.1138	0.81(0.44–1.47)	0.4835
Experience of surgeon	2.71(1.47–4.99)	0.0014	2.28(1.19–4.38)	0.013
Emergency surgery	0.58(0.31–1.09)	0.0922	0.44(0.22–0.88)	0.0202
Previous laparotomy	2.06(1.29–3.29)	0.0026	1.72(1.01–2.93)	0.045
Concurrent disease	1.73(1.07–2.79)	0.0256	1.46(0.85–2.51)	0.1755
Smoking	2.57(1.39–4.75)	0.0026	1.82(0.82–4.05)	0.1412
Drinking	1.68(0.57–4.97)	0.3472	0.75(0.17–3.29)	0.7082
pericholecystic edema	7.66(1.68–34.84)	0.0084	4.94(0.72–33.93)	0.1046
CBD stone	5.26(1.92–14.4)	0.0012	6.91(1.55–30.8)	0.0112
Gallbladder thickening	3.11(1.91–5.06)	0	1.77(0.99–3.15)	0.0526
Age	1.01(1–1.03)	0.0566	1.01(1–1.03)	0.1523
Body Temperature	2.14(1.34–3.41)	0.0015	1.94(1.1–3.41)	0.0217
WBC	1(1-1)	0	1(1–1)	0.0051
bilirubin	1.03(0.92–1.15)	0.6258	0.65(0.43–0.99)	0.0443
alkaline phosphatase	1(1-1)	0.0001	1(1–1)	0.0012
CBD diameter	1.14(1.03–1.26)	0.0087	1(0.87–1.14)	0.9863

OR (CI) represents Odds Ratio and 95% confidence intervals