Table 1 Demographic and preoperative characteristics of study patients before and after propensity score matching.

From: Comparison of perioperative outcomes between pure laparoscopic surgery and open right hepatectomy in living donor hepatectomy: Propensity score matching analysis

 Before propensity score matchingAfter propensity score matching
ODRH
(n = 187)
PLDRH
(n = 138)
P-valueSMDODRH
(n = 123)
PLDRH
(n = 123)
P-valueSMD
Age, years31 (24–42)30 (23–37)0.170−0.16231 (23–39)30 (23–42)0.903−0.016
Sex, n (%)  0.0300.239  0.7960.032
Male120 (64.2)72 (52.2)  73 (59.3)71 (57.7)  
Female67 (35.8)66 (47.8)  50 (40.7)52 (42.3)  
Height, cm168.2 ± 8.5167.0 ± 8.80.185−0.147168.2 ± 8.7167.8 ± 8.90.725−0.045
Weight, kg66.5 ± 10.165.5 ± 10.60.379−0.09666.7 ± 10.565.8 ± 10.30.502−0.085
ASA classification, n (%)  0.9180.011  0.4510.094
  I174 (93.0)128 (92.8)  116 (94.3)113 (91.9)  
  II13 (7.0)10 (7.2)  7 (5.7)10 (8.1)  
Surgeon, n (%)  0.195−0.199  0.9550.030
  A75 (40.1)66 (47.8)  55 (44.7)56 (45.5)  
  B25 (13.4)11 (8.0)  10 (8.1)11 (8.9)  
  C87 (46.5)61 (44.2)  58 (47.2)56 (45.5)  
Type of operation, n (%)  0.256−0.110  0.7340.035
  Right hepatectomy181 (96.8)130 (94.2)  118 (95.9)119 (96.7)  
  Extended right hepatectomy6 (3.2)8 (5.8)  5 (4.1)4 (3.3)  
Conversion to open approach5 (3.6)  5 (4.1)  
Previous abdominal surgery, n (%)32 (17.1)24 (17.4)0.948−0.00722 (17.9)23 (18.7)0.869−0.021
Current smoker, n (%)35 (18.7)21 (15.2)0.4090.09723 (18.7)20 (16.3)0.6150.068
  1. Data are presented as means ± standard deviations (SDs), medians with interquartile ranges (IQRs) in parentheses, or numbers with percentages in parentheses. ODRH, open donor right hepatectomy; PLDRH, pure laparoscopic donor right hepatectomy; BMI, body mass index; ASA, American Society of Anesthesiologists; SMD, Standardized mean difference.