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Table 1 Classification criteria for staging of AKI

From: Urinary [TIMP-2]*[IGFBP7] for early prediction of acute kidney injury after coronary artery bypass surgery

AKI KDIGO stage

Number

Classification criterion for AKI stage

Increase of serum creatinine

Decrease of diuresis or RRT

1

13 (21.7 %)

8

5

2

1 (1.7 %)

1

0

3

5 (8.3 %)

0

5

All (1–3)

19 (31.7 %)

9

10