Impact of body mass index in elderly patients treated with laparoscopic liver resection for hepatocellular carcinoma

Table 2 Preoperative and clinical characteristics of elderly patients with hepatocellular carcinoma with a 30 > body mass index ≥ 30 who underwent laparoscopic liver resection

	LLR before PSM (224)			After PSM (54)
	BMI < 30 (196)	BMI ≥ 30 (28)	P	BMI < 30 (27)	BMI ≥ 30 (27)	P
Operative time (min), median (range)	200 (70-600)	220 (65-337)	0.70	200 (80-320)	205 (65-337)	0.7
Blood transfusion, n (%)	32 (16)	1 (3)	0.09	5 (18)	1 (3)	0.2
Dindo-Clavien classification, n (%)			0.23			0.6
I-II	18 (92)	27 (97)		23 (93)	26 (96)
III-IV	16 (8)	1 (3)		2 (7)	1 (4)
Postoperative complications, n (%)			0.02			1.0
Yes	93 (47)	7 (25)		6 (22)	7 (26)
No	103 (53)	21 (75)		21 (78)	20 (74)
Type of complication, n (%)
Liver failure	15 (8)	1 (3)	0.70	2 (7)	1 (4)	1.0
Ascites	24 (12)	2 (7)	0.70	3 (11)	2 (7)	1.0
Biliary leakage	2 (1)	1 (3)	0.30	0	1 (4)	1.0
Hemorrhage	8 (4)	0	0.60	2 (7)	0	0.5
Systemic infection	14 (7)	1 (3)	0.70	2 (7)	1 (4)	1.0
Intra-abdominal abscess	7 (3)	0	0.60	2 (7)	1 (4)	1.0
Wound infection	4 (2)	3 (11)	0.04	0	3 (11)	0.2
Portal thrombosis	2 (1)	0	1.00	1 (4)	0	1.0
Pulmonary	15 (7)	0	0.20	2 (7)	0	0.5
Cardiac	11 (5)	1 (3)	1.00	2 (7)	1 (4)	1.0
Renal	8 (4)	0	0.60	2 (7)	0	0.5
Reoperation, n (%)	6 (6)	1 (3)	1.00	0	1 (4)	1.0
Postoperative death, n (%)	7 (3)	0	0.60	2 (7)	0	0.5
Postoperative treatment, n (%)	6 (3)	1 (3)	1.00	0	1 (4)	1.0
Length of hospital stay, median (range)	6 (2-40)	5.5 (3-21)	0.20	4.5 (2-40)	6 (3-21)	0.1
Mortality at 90 d, n (%)	9 (5)	0	0.60	2 (7)	0	0.5

Continuous variables were compared using an independent sample t-test and Mann-Whitney U test. Categorical variables were compared using the chi-square test and Kruskal-Wallis test respectively; LLR: Laparoscopic liver resection; PSM: Propensity score matching; BMI: Body mass index.