Table 1 Baseline characteristics of the study group and comparison of laparoscopic and open liver resection groups

 Male

14 (38.9%)

7 (58.3%)

7 (29.2%)

 Female

22 (61.1%)

5 (41.7%)

17 (70.8%)

Age (years)

65 (53–69)

61 (45–68)

65 (54–67)

0.208

BMI > 25 (number of patients)

18 (50.0%)

5 (41.7%)

13 (54.2%)

0.725

 Right hemihepatectomy

22 (61.1%)

6 (50%)

16 (66.7%)

 Right extended hemihepatectomy

7 (19.4%)

4 (33.3%)

3 (12.5%)

 Left hemihepatectomy

5 (13.9%)

2 (16.7%)

3 (12.5%)

 Left extended hemihepatectomy

2 (5.6%)

2 (8.3%)

 Colorectal metastases

20 (55.6%)

7 (58.3%)

13 (54.2%)

 Hepatocellular carcinoma

3 (8.3%)

3 (12.5%)

 Cholangiocarcinoma

6 (16.7%)

1 (8.3%)

5 (20.8%)

 Other

7 (19.4%)

4 (33.3%)

3 (12.5%)

Prior upper abdominal surgery

7 (19.4%)

2 (16.7%)

5 (20.3%)

1.000

 Cholecystectomy

26 (72.2%)

10 (83.3%)

16 (66.7%)

0.510

 Lymphadenectomy

4 (16.7%)

 Diaphragm resection

4 (16.7%)

 Extrahepatic bile ducts resection with Roux-en-Y anastomosis

2 (8.3%)

Number of tumors

1 (1–2)

1 (1–3)

1 (1–2)

0.772

Maximal tumor diameter (millimeters)

45 (30–75)

41 (25–61)

45 (33–80)

0.548

Liver cirrhosis (number of patients)

1 (2.78%)

1 (8.33%)

0 (0%)

0.333

 White Blood Cell (10³/L)

6.43 (5.07–7.67)

6.43 (4.72–8.03)

6.45 (5.24–7.56)

0.933

 Hemoglobin (g/dL)

13.1 (12.0–14.1)

13.0 (12.0–15.1)

13.1 (12.1–13.7)

0.523

 Platelets (10³/μL)

213 (189–276)

208 (194–268)

222 (185–276)

0.788

 Bilirubin (mg/dL)

0.44 (0.33–0.77)

0.51 (0.31–0.86)

0.44 (0.35–0.73)

0.933

 Albumin (g/dL)

4.4 (4.0–4.7)

4.3 (4.1–4.7)

4.5 (4.0–4.7)

0.853

 INR

1.03 (0.97–1.07)

1.04 (0.98–1.09)

1.01 (0.96–1.07)

0.449

 Creatinine (mg/dL)

0.76 (0.68–0.88)

0.76 (0.64–0.87)

0.80 (0.70–0.91)

0.603

 Aspartate aminotransferase (IU/L)

31 (24–41)

25 (22–34)

36 (27–44)

0.090

 Alanine aminotransferase (IU/L)

27 (20–47)

23 (19–37)

29 (21–49)

0.364

Duration of surgery (minutes)

270 (240–540)

600 (540–690)

240 (210–285)

< 0.05*