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Table 3 Change in serum creatinine from baseline in all patients with and without an ICD-10 N17x code for AKI (referred to as code positive or code negative)

From: Validation of administrative database codes for acute kidney injury in kidney transplant recipients

Diagnostic coding algorithm

Code

Number

Absolute change (μmol/L)

Median (IQR)

Relative change (%)a

All diagnoses

+

74

104.2 (57.0 to 158.0)

56.9 (35.0 to 111.4)

−

450

16.0 (−3.0 to 41.0)

12.9 (−2.2 to 30.5)

Admission diagnosis

+

54

109.0 (62.0 to 161.0)

64.0 (35.0 to 122.1)

−

470

18.0 (−2.0 to 45.0)

13.8 (−1.5 to 32.5)

Main diagnosis/most responsible diagnosis

+

25

128.0 (57.0 to 160.0)

71.3 (27.4 to 122.1)

−

499

19.0 (−1.0 to 51.0)

15.3 (−0.7 to 37.4)

  1. aRelative change = (peak serum creatinine − baseline serum creatinine)/baseline serum creatinine × 100