Table 1.

Patient and surgical characteristics

VariableMain CohortMissing bSCr CohortP Value
nMean±SDnMean±SD
Patient characteristics
 No. patients8024106
 Women2833 (35.3)34 (32.1)0.56
 Age, yr802465.5±12.510660.6±14.2<0.001
 BMI, kg/m2787626.8±4.210326.60±3.880.53
 bSCr, mg/dl80241.11±0.41
 eGFRMDRD, ml/min per 1.73m2802469.4±19.4
 eGFRCKD-EPI, ml/min per 1.73m2802467.6±19.1
 Logistic EuroSCORE80246.9±8.11067.6±9.80.51
Surgical characteristics
 CABG3070 (38.3)45 (42.5)
 Combined procedure1590 (19.8)29 (27.4)
 Off-pump CABG568 (7.1)6 (5.6)
 Valve procedure2796 (34.8)26 (24.5)0.07
 Surgery time, min8024227.0±75.0106224.8±63.90.73
 ECC time, min8024101.2±55.2106102.6±48.60.77
 AoCC time, min802463.1±35.310660.7±35.50.49
 Reoperation656 (8.2)12 (11.3)0.32
Postoperative complications
 Revision ≤48 h288 (3.6)7 (6.6)0.17
 Revision >48 h596 (7.4)5 (4.7)0.38
 SCr ICU Admission, mg/dl74731.01±0.371021.23±1.030.04
 Follow-up time, yr80246.4±3.81066.21±3.860.67
 KDIGO Stage 06747 (85.1)73 (71.6)
 KDIGO Stage 1702 (8.9)19 (18.6)
 KDIGO Stage 2119 (1.5)1 (0.9)
 KDIGO Stage 3361 (4.6)9 (8.5)
 RRT321 (4.0)6 (5.6)0.54
 Deceased2618 (32.6)38 (35.9)0.55
 MR per 100 patient years80245.131065.930.81
  • Values are given as numbers (n), percentages (%), or means±SD. bSCr, baseline serum creatinine; BMI, body mass index; MDRD, Modification of Diet in Renal Disease; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; EuroSCORE, European System for Cardiac Operative Risk Evaluation; CABG, coronary artery bypass graft; ECC, extracorporeal circulation; AoCC, aortic crossclamp; SCr, serum creatinine; ICU, intensive care unit; KDIGO, Kidney Disease Improving Global Outcomes; MR, mortality rate.