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Table 3 Staging of AKI

From: Postoperative blood pressure deficit and acute kidney injury progression in vasopressor-dependent cardiovascular surgery patients

  All patients No KDIGO stage shift (AKI–) ≥1 KDIGO stage shift (AKI+) P value
AKI stage at T0     0.408
 No AKI 66 (87) 33 (83) 33 (92)  
 Stage 1 5 (7) 4 (10) 1 (3)  
 Stage 2 5 (7) 3 (8) 2 (6)  
Maximum AKI stage     <0.001
 No AKI 33 (43) 33 (83) 0 (0)  
 Stage 1 24 (32) 4 (10) 20 (56)  
 Stage 2 11 (15) 3 (8) 8 (22)  
 Stage 3 8 (11) 0 (0) 8 (22)  
AKI stage progression     <0.001
 No change 40 (53) 40 (100) 0 (0)  
 One stage 23 (30) 0 (0) 23 (64)  
 Two stages 7 (9) 0 (0) 7 (19)  
 Three stages 6 (8) 0 (0) 6 (17)  
CRRT during ICU stay 5 (7) 1 (3) 4 (11) 0.131
  1. Qualitative parameters are expressed as number (%)
  2. AKI acute kidney injury, CRRT continuous renal replacement therapy, ICU intensive care unit, KDIGO Kidney Disease: Improving Global Outcomes, T0 the time when vasopressor support was started