Skip to main content

Table 2 Perioperative univariate analysis of AKI

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

 

No AKI (N = 657)

AKI (N = 412)

P

Demographic data

 Male

394(60.0)

273(66.3)

0.039

 Age (year)

61.8 ± 8.1

61.7 ± 8.3

0.936

Medical history

 Hypertension

294(44.7)

184(44.7)

0.977

 DM

102(15.5)

70(17.0)

0.526

 NYHA classification 3–4

465(70.8)

339(82.3)

< 0.001

Laboratory values

 Hemoglobin (g/L)

131.6 ± 14.2

131.1 ± 16.1

0.555

 Albumin(g/L)

40.3 ± 3.6

40.0 ± 3.6

0.187

Kidney function

 Serum creatinine (mg/dl)

81.3 ± 25.1

84.5 ± 23.8

0.038

 eGFR (ml/min/1.73m2)

83.9 ± 18.7

82.8 ± 21.3

0.395

 eGFR< 60 ml/min/1.73m2

54(8.4)

50(12.1)

0.048

Angiographic values

 Interval between angiography and surgery (day)

4.5 ± 3.3

4.1 ± 3.0

0.048

 aContrast media dose (ml/kg)

285(243,341)

280(238,347)

0.696

 Contrast media dose> 240 (ml/kg)

434(66.1)

302(73.3)

0.040

Surgical data

 Valve

427(65.0)

305(74.0)

< 0.001

 CABG

205(31.2)

77(18.7)

< 0.001

 Valve & CABG

25(3.8)

30(7.3)

0.026

 CPB utilization

443(67.3)

319(77.4)

< 0.001

 aCPB time (min)

83(67,109)

100(77,132)

< 0.001

 bErythrocyte transfusion

296(44.6)

223(54.1)

0.04

Prognosis

 RRT

3(0.5)

17(4.1)

< 0.001

 In-hospital mortality

0

3(0.7)

0.029

 aLength of ICU stay (day)

32(21,63)

47(26,90)

< 0.001

 aLength of hospital stay (day)

12(10,15)

13(11,17)

0.003

  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, 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. bThe amount of erythrocyte transfusion refers to the amount of transfusion during both intraoperative and postoperative on the day of surgery