Low, rather than High, Body Mass Index Is a Risk Factor for Acute Kidney Injury in Multiethnic Asian Patients: A Retrospective Observational Study

Figure 2

Acute kidney injury categories according to KDIGO classification by percentages according to the primary diagnosis by ICD-9 codes. AKI: acute kidney injury, defined as a ≥1.5-fold increase in serum creatinine within the previous 7 days, or ≥26.5 μmol/l (≥0.3 mg/dl) increase from baseline within 48 hours; AKI1: 1.5–1.9-fold increase in serum creatinine within the previous 7 days, or ≥26.5 μmol/l (≥0.3 mg/dl) increase from baseline within 48 hours; AKI2: 2.0–2.9-fold increase in serum creatinine within the previous 7 days; AKI3: 3-fold or higher increase in serum creatinine from baseline within 7 days, or the need for dialysis, or when serum creatinine ≥ 353.6 μmol/l (≥4.0 mg/dl).