Table 2 Patient characteristics of patients with AKI KDIGO ≥2 compared to patients with no or mild AKI (KDIGO 0–1)

Age (years)

76.2 ± 3.9

68.8 ± 9.1

0.003

Male gender (n, %)

5 (83.3)

43 (79.6)

n.s.

Weight (kg)

77.8 ± 11.1

83.7 ± 17.7

n.s.

Height (cm)

174.3 ± 9.2

171.8 ± 8.3

n.s.

CPB time (min)

113.3 ± 41.8

102.1 ± 47.3

n.s.

Preoperative Creatinine (mg/dl)

1.01 ± 0.17

1.14 ± 0.23

n.s.

Preoperative eGFR (ml/min/1.73 m²)

73.5 ± 13.9

65.0 ± 17.5

n.s.

SAPS

30.8 ± 11.6

24.9 ± 13.8

n.s.

Diuresis on the day of CABG (ml/kgBW/h)

1.30 ± 0.33

0.92 ± 0.69

n.s.

Diuresis on POD 1 (ml/kgBW/h)

1.69 ± 0.66

1.27 ± 0.49

n.s.

Fluid balance on the day of surgery (ml)

2843.0 ± 973.8

2354.2 ± 867.5

n.s.

TISS-28

26.0 ± 6.2

19.7 ± 10.4

n.s.

Comorbidities (n, %)

 MI within 6 months

3 (50.0)

13 (24.1)

n.s.

 Heart failure NYHA ≥3

1 (16.7)

3 (5.6)

n.s.

 Hypertension

4 (66.7)

49 (90.7)

n.s.

 Smoking

3 (50.0)

21 (38.9)

n.s.

 Diabetes

2 (33.3)

19 (35.2)

n.s.

 COPD

1 (16.7)

7 (12.9)

n.s.

 Atrial fibrillation

4 (66.7)

21 (38.9)

n.s.

 Peripheral artery disease

1 (16.7)

17 (31.5)

n.s.

 Shock (n, %)

5 (83.3)

6 (11.1)

<0.001

 Sepsis (n, %)

5 (83.3)

3 (5.6)

<0.001

 ICU stay (days)

9.7 ± 6.4

5.5 ± 7.6

n.s.

 Hospital mortality (n, %)

3 (50.0)

0 (0)

<0.001