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Table 1 Baseline and procedural characteristics after matching

From: Acute kidney injury following on-pump or off-pump coronary artery bypass grafting in elderly patients: a retrospective propensity score matching analysis

variable A group B group p value
(n = 466) No. (%) (n = 466) No. (%)
Female gender 84(18.0) 89(19.1) 0.736
Age, y 73.2 ± 7.2 74.0 ± 8.4 0.119
Body mass index, kg/m2 25.6 ± 4.3 25.1 ± 4.7 0.091
DM
 Insulin-dependent 74(15.9) 67(14.4) 0.583
 Non-insulin-dependent 68(14.6) 61(13.1) 0.569
Hypertension 246(52.8) 237(50.9) 0.6
Hyperlipemia 137(29.4) 123(26.4) 0.342
GFR(ml/min/1.73m2) 81.3 ± 16.4 80.4 ± 15.7 0.392
COPD 38(8.2) 44(9.4) 0.563
Previous
 Cerebal infarction 24(5.2) 29(6.2) 0.572
 Myocardial infarction 75(16.1) 66(14.2) 0.465
 PCI 81(17.4) 73(15.7) 0.537
LVEF    0.33
  > 0.50 363(77.9) 375(80.5)  
 0.30–0.50 98(21.0) 87(18.7)  
  < 0.30 5(1.1) 4(0.9)  
Extent of CAD    0.187
 1 vessel 17(3.6) 25(5.4)  
 2 vessel 48(10.3) 54(11.6)  
 3 vessel 401(86.1) 387(83.0)  
 LM 142(30.1) 122(26.2) 0.167
EuroScoreII 2.6 ± 1.2 2.5 ± 1.3 0.223
Distal anastomosis 3.4 ± 0.9 3.3 ± 1.1 0.129
 LIMA 438(94.0) 444(95.3) 0.467
 Radial Artery 72(15.5) 63(13.5) 0.457
CPB time(min) 78.4 ± 21.7
  1. DM diabetes mellitus, PCI percutaneous coronary intervention, COPD chronic obstructive pulmonary disease, GFR glomerular filtration rate, LVEF left ventricular ejection fraction, CAD coronary artery disease, LIMA left internal mammary artery, CPB cardiopulmonary bypass