(c) 30-day mortality

Variables	Univariate			Multivariate
	OR	95% CI	p	OR	95% CI	p
Age	1.038	0.997–1.082	0.073	1.038	0.994–1.085	0.094
Gender	1.720	0.718–4.124	0.224
BMI (kg/m2)	1.032	0.928–1.147	0.564
ASA score	1.179	0.504–2.762	0.704
Indication of extended hepatectomy
Benign liver disease	Reference	Reference	Reference	Reference	Reference	Reference
Primary malignancy	2.406	0.239–24.220	0.456	1.784	0.078–40.796	0.717
Metastatic disease	3.517	1.150–10.754	0.027	3.460	0.856–13.980	0.081
Preoperative chemotherapy	0.570	0.126–2.568	0.464
Platelet count <150 x 109/L	5.394	1.784–16.311	0.003	4.430	1.055–18.777	0.043
Intraoperative blood loss (L)	1.342	1.085–1.659	0.007	1.166	0.753–1.805	0.492
Intraoperative RBC/FFP transfusion	3.216	1.295–7.986	0.012	1.604	0.435–5.921	0.478
Operation time (hour)	1.261	1.023–1.555	0.030	1.093	0.839–1.425	0.509

OR: odds ratio; CI: confidence interval; BMI: body mass index; ASA: American Society of Anesthesiologists; RBC: red blood cells; FFP: fresh-frozen plasma.