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Table 2 Diagnosis and staging of AKI before and after adjustment for fluid balance in patients after cardiac surgery

From: Hemodilution is associated with underestimation of serum creatinine in cardiac surgery patients: a retrospective analysis

Unadjusted AKI stage Adjusted AKI stage Total, N (%)
0 1 2 3
0 890 (66.7) 50 (3.7) 0 (0) 0 (0) 940 (70.5)
1 19 (1.4) 301 (22.6) 6 (0.4) 0 (0) 326 (24.4)
2 0 (0) 2 (0.1) 31 (2.3) 7 (0.5) 40 (3.0)
3 0 (0) 0 (0) 1 (0.07) 27 (2.0) 28 (2.1)
Total, N (%) 909 (68.1) 353 (26.5) 38 (2.8) 34 (2.5) 1334
  1. Kappa = 0.86 (95% CI 0.83–0.89) and percentage agreement = 94.9% for AKI diagnosis
  2. Kappa = 0.86 (95% CI 0.83–0.89) and percentage agreement = 93.8% for AKI staging