Benefit of laparoscopic liver resection in high body mass index patients

Table 3 Univariate and multivariate analysis on prolonged operation time

	Operation time		Univariate	Multivariate
	< 200	≥200	P value	P value	OR (95%CI)
Number of patients	25	43
Age (yr)	71.5 ± 8.4	67.4 ± 9.6	0.082
Sex (Male/Female)	16/9	32/11	0.363
Body mass index (kg/m2)	22.7 ± 2.6	24.8 ± 4.5	0.019	0.024	1.259 (1.031-1.538)
HBV	2	8	0.304
HCV	12	20	0.906
Open liver resection < 0.001	3	26	< 0.001	< 0.001	16.244 (3.648-72.340)
Tumor size (mm)	23.3 ± 9.9	29.8 ± 14.4	0.049	0.047	1.056 (1.001-1.114)
Total bilirubin (mg/dL)	0.77 ± 0.28	0.79 ± 0.31	0.829
Albumin (g/dL)	3.94 ± 0.59	3.91 ± 0.46	0.848
Prothrombin time (%)	101.4 ± 21.9	98.2 ± 17.2	0.508
Indocyanine green (%)	11.8 ± 11.1	18.9 ± 14.8	0.042
Aspartate transaminase (U/L)	36.8 ± 20.5	39.1 ± 20.9	0.669
Alanine transaminase (U/L)	30.2 ± 22.8	33.3 ± 22.3	0.596
γ-glutamy transpeptidase (U/L)	57.5 ± 48.3	64.8 ± 51.3	0.567
Alkaline phosphatase (U/L)	315.6 ± 109.9	306.0 ± 105.5	0.725
Cholinesterase (U/L)	176.6 ± 127.0	188.5 ± 115.3	0.649
White blood cell (/mm3)	4342 ± 1383	4638 ± 1748	0.470
Hemoglobin (g/dL)	12.8 ± 1.9	13.1 ± 2.1	0.598
Hematocrit (%)	36.9 ± 7.3	39.0 ± 5.6	0.185
Platelet count (× 103/mm3)	14.5 ± 7.7	13.2 ± 6.0	0.433

LLR: Laparoscopic liver resection; OLR: Open liver resection.