Table 1 Patient characteristics

Age

59 (20–79)

67 (40–85)

65 (49–78)

Male:female

5:7

17:10

4:2

SAPS II score

n/a

68.8 (35–99)

BMI (kg/m²)

26.9 (20.8–49)

30.8 (26–37)

 Normal weight (BMI 18.5–24.9)

9

0

 Overweight (BMI 25–29.9)

14

3

 Obese (BMI > 30)

4

3

Days in ICU

n/a

3.6 (1–12)

30 (21–53)

Comorbidities

 Hypertension

3

8

1

 Diabetes Mellitus

1

3

2

 COPD or asthma

4

7

0

 Coronary disease

1

5

0

 Neurological

1

3

0

 Renal disease

0

0

0

 Vascular surgery

0

2

0

 Autoimmune disease

2

4

0

 Neoplasms (extra renal)

4

4

0

RIFLE stage

 Risk

n/a

0

n/a

 Injury

n/a

12

n/a

 Failure

n/a

15

n/a

 Loss of function

n/a

0

n/a

 End-stage renal disease

n/a

0

n/a

KDIGO AKI score

 0

n/a

n/a

1

 1

n/a

n/a

0

 2

n/a

n/a

0

 3

n/a

n/a

5

Need for RRT (Yes:no)

n/a

12:15

4:2

Mean biopsy time (mins)

n/a

33 (24–150)

21 (6–40)

Microorganisms

 Gram positive

n/a

12

3^#

 Gram negative

n/a

23

1*

 Virus (norovirus & HIV)

n/a

2

0

 Fungi/yeast

n/a

5

0

 SARS-CoV-2

n/a

n/a

6