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Table 1 Patients Perioperative Characteristics Stratified by the Interval between Coronary Angiography and Cardiac Surgery

From: Impact of cardiac catheterization timing and contrast media dose on acute kidney injury after cardiac surgery

  ≤7 days (N = 888) >7 days (N = 181) P
Demographic data
 Male 538(60.6) 129(71.3) 0.007
 Age (year) 61.3 ± 8.1 63.9 ± 8.3 < 0.001
Medical history
 Hypertension 364(41.0) 114(63.0) < 0.001
 DM 116(13.1) 56(30.9) < 0.001
 NYHA classification 3–4 686(77.3) 118(65.2) < 0.001
Laboratory values
 Hemoglobin (g/L) 131.5 ± 15.1 130.9 ± 141.3 0.685
 Albumin(g/L) 40.2 ± 3.5 39.8 ± 3.7 0.184
Kidney function
 Serum creatinine (mg/dl) 81.9 ± 24.5 85.8 ± 25.0 0.055
 eGFR (ml/min/1.73m2) 83.8 ± 19.5 81.8 ± 20.8 0.227
 eGFR< 60 ml/min/1.73m2 80(9.1) 24(13.9) 0.069
Angiographic values
 Interval between angiography and surgery (day) 3.2(1.9) 9.7(2.7) < 0.001
aContrast media dose (ml/kg) 280(231,349) 285(246,342) 0.198
Surgical data
 Valve 692(77.2) 40(22.1) < 0.001
 CABG 151(17.0) 131(72.4) < 0.001
 Valve & CABG 45(5.1) 10(5.5) 0.326
 CPB 705(79.4) 57(31.5) < 0.001
aCPB time (min) 100(75,127) 90(70,119) 0.106
bErythrocyte transfusion 441(49.6) 75(41.4) 0.149
Prognosis
 AKI 374(42.1) 38(21.0) < 0.001
 KDIGO 1 305(34.3) 29(16.0) < 0.001
 KDIGO 2 45(5.1) 8(4.5) 0.286
 KDIGO 3 24(2.7) 1(0.6) < 0.001
 RRT 16(1.8) 4(2.2) 0.762
 In-hospital mortality 2(0.2) 1(0.6) 0.427
aLength of ICU stay (day) 40(22,64) 42(22,70) 0.861
aLength of hospital stay (day) 14(11,18) 12(11,15) < 0.001
  1. AKI Acute kidney injury, DM diabetes mellitus, NYHA New York Heart Association, eGFR estimated glomerular filtration rate, calculated by CKD-EPI formulae, CABG coronary artery bypass grafting, CPB cardiopulmonary bypass, KDIGO kidney disease: improving global outcomes, RRT renal replacement therapy, ICU intensive care unit
  2. P-values are the results of unpaired t-test or Mann–Whitney U test for continuous variables, and × 2 test or Fisher’s exact test for categorical variables
  3. aThe values are expressed as the median (IQR)
  4. b The amount of erythrocyte transfusion refers to the amount of transfusion during both intraoperative and postoperative on the day of surgery