Table 4.

Univariable and multivariable analyses of 90 day mortality

	90 days mortality	Univariable*	Multivariable†
Characteristic	n (%)	p value	Odds ratio	95% confidence interval	p value
All patients	81 (2.2)
Sex‡
Male	54 (2.8)	0.008	1.693	1.042–2.750	0.04
Female	27 (1.5)
Age, years‡
≥60	54 (3.5)	<0.0001	2.339	1.455–3.761	<0.0001
<60	27 (1.3)
Body mass index, kg/m2
<30	61 (2.3)	0.4	-	-	-
≥30	20 (1.9)
ASA-PS
≥3	61 (2.3)	0.4	-	-	-
<3	20 (1.9)
Disease‡
Primary hepatobiliary cancer	22 (4.0)	0.003	ref
Metastatic liver cancer	59 (1.9)		0.743	0.404–1.364	0.3
Benign	0		0	0	1
Second stage hepatectomy of two stage hepatectomy
Yes	6 (5.4)	0.02	-	-	-
No	75 (2.1)
Repeat resection‡
No	80 (2.4)	0.02	5.757	0.792–41.83	0.08
Yes	1 (0.3)
Type of hepatectomy‡
Major	35 (3.8)	<0.0001	1.772	1.086–2.891	0.02
Minor	46 (1.7)
Resection with RFA‡
Yes	17 (3.4)	0.04	2.142	1.180–3.889	0.01
No	64 (2.0)
Combined biliary reconstruction‡
Yes	13 (7.1)	<0.0001	1.968	0.919–4.214	0.08
No	68 (1.9)
Operative time, minutes
<180	38 (2.3)	0.6
≥180	43 (2.1)
Estimated blood loss, mL‡
≥1000	18 (8.1)	<0.0001	1.501	0.763–2.955	0.2
<1000	63 (1.8)
Intraoperative red blood cell transfusion‡
Yes	32 (7.5)	<0.0001	3.653	2.068–6.453	<0.0001
No	49 (1.5)
Period‡
Early (1998–2003)	25 (3.1)	0.008	ref
Middle (2004–2009)	36 (2.6)		1.012	0.584–1.755	1
Late (2010–2015)	20 (1.3)		0.727	0.378–1.398	0.3

^*χ2 test

^†Logistic regression analysis

^‡Variables entered into the logistic regression analysis

ASA-PS, American Society of Anesthesiologists Physical Status; RFA, radiofrequency ablation