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Table 1 Clinical preoperative characteristics before and after matching with propensity score matching (PSM)

From: Minimally invasive versus open right hepatectomy: comparative study with propensity score matching analysis

Variable ORH
N = 131
MIRH
N = 47
P ORH after PSM
N = 60
MIRH after PSM
N = 37
P
Gender (%)    0.97    1
 Female 59 (45%) 22 (46.8%)   27 (45%) 17 (45.9%)  
 Male 72 (55%) 25 (53.2%)   33 (55%) 20 (54.1%)  
Age (years) 58 [45–67] 59 [47.5–67] 0.88 59 [52.5–68.25] 59 [52–67] 0.80
BMI (kg/m2) 25.3 [22.3–28.5] 25.4 [22.5–27.3] 0.80 25.2 [22.1–27.7] 25.6 [22.5–27.1] 0.84
Obesity (%) 20 (17.4%) 5 (11.9%) 0.56 7 (13%) 3 (9.4%) 0.74
ASA (%)    0.67    0.84
 1–2 108 (82.4%) 37 (78.7%)   48 (80%) 31 (83.8%)  
 3 23 (17.6%) 10 (21.3%)   12 (20%) 6 (16.2%)  
Cardiologic comorbities (%) 13 (9.9%) 3 (6.4%) 0.57 7 (11.7%) 2 (5.4%) 0.48
Pulmonary comorbities (%) 4 (3.1%) 2 (4.3%) 0.66 2 (3.3%) 2 (5.4%) 0.63
Cirrhosis (%) 11 (8.4%) 11 (23.4%) 0.02 7 (11.7%) 7 (18.9%) 0.49
Diagnostic (%)    0.06    0.87
Benign 17 (13%) 9 (19.1%)   9 (15%) 7 (18.9%)  
Metastasis 87 (66.4%) 23 (48.9%)   33 (55%) 19 (51.4%)  
Malignant 26 (19.8%) 15 (31.9%)   18 (30%) 11 (29.7%)  
Nodules (%)    0.03    0.95
 1 41 (35.7%) 7 (15.9%)   13 (21.7%) 7 (18.9%)  
 2–3 52 (45.2%) 23 (52.3%)   33 (55%) 21 (56.8%)  
 ≥ 4 22 (19.1%) 14 (31.8%)   14 (23.3%) 9 (24.3%)  
Previous abdominal surgery (%) 100 (76.3%) 20 (42.6%) < 0.0001 36 (60%) 18 (48.6%) 0.38
Chemotherapy (%) 77 (59.2%) 20 (42.6%) 0.07 28 (46.7%) 16 (43.2%) 0.91
PVE (%) 24 (18.3%) 11 (23.4%) 0.59 12 (20%) 9 (24.3%) 0.80
  1. Values with statistical significance (P < 0.05)
  2. ORH open right hepatectomy, MIRH minimally invasive right hepatectomy, PSM propensity score matching, BMI body mass index, ASA American Society of Anesthesiologists physical status score, PVE portal vein embolization
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