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Table 3 AKI diagnoses and staging using UO criterion with ABW and IBW

From: Actual versus ideal body weight for acute kidney injury diagnosis and classification in critically Ill patients

AKI stage (Actual BW) AKI stage (ideal BW) Total N (%)
0 1 2 3
0 289 (58.6) 0 (0) 0 (0) 0 (0) 289 (58.6)
1 45 (9.1) 61 (12.4) 0 (0) 0 (0) 106 (21.5)
2 5 (1.0) 31 (6.3) 40 (8.1) 0 (0) 76 (15.4)
3 0 (0) 0 (0) 5 (1.0) 17 (3.4) 22 (4.5)
Total, N (%) 339 (68.8) 92 (18.7) 45 (9.1) 17 (3.4) 493
  1. Kappa = 0.78 (95% CI 0.73-0.84) and percentage agreement = 89.9% for AKI diagnosis.
  2. Kappa = 0.77 (95% CI 0.73-0.82) and percentage agreement = 82.6% for AKI staging.
  3. Abbreviation: AKI acute kidney injury, BW body weight, CI confidence interval.