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Table 2 AKI diagnoses and staging using admission SCr and GFR-estimated SCr for patients without baseline outpatient SCr (n = 3504)

From: The comparison of the commonly used surrogates for baseline renal function in acute kidney injury diagnosis and staging

AKI stage (SCrGFR-75)

AKI stage (SCrADM)

Total N (%)

0

1

2

3

0

2361 (67.4)

133 (3.8)

13 (0.4)

0 (0)

2507 (71.6)

1

356 (10.2)

160 (4.6)

28 (0.8)

2 (0.1)

546 (15.6)

2

134 (3.8)

85 (2.4)

31 (0.9)

10 (0.3)

260 (7.4)

3

82 (2.3)

45 (1.3)

9 (0.3)

55 (1.6)

191 (5.5)

Total, N (%)

2933 (83.7)

423 (12.1)

81 (2.3)

67 (1.9)

3504 (100)

  1. Kappa = 0.42 (95 % CI 0.39-0.46) and percentage agreement = 79.5 % for AKI diagnosis,
  2. Kappa = 0.39 (95 % CI 0.36-0.42) and percentage agreement = 74.4%for AKI staging
  3. Abbreviation: AKI, acute kidney injury; SCrADM, the admission serum creatinine; SCrGFR-75, an estimated serum creatinine based on an assumed GFR of 75 ml/min/1.73 m2
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BMC Nephrology

ISSN: 1471-2369

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