LCN2 and acute kidney injury: The results are expressed as median and IQR. P < 0.05 was considered statistically significant.NGAL - neutrophil gelatinase-associated lipocalin. uNGAL - urinary NGAL. bNGAL - whole blood NGAL. sNGAL - serum NGAL. uCr - urinary creatinine. AKI - acute kidney injury.