In the AKI and non-AKI groups, the median serum CypA levels were 5.8 ng/mL and 4.0 ng/mL (p < 0.001), respectively; the median uNGAL levels were 91 ng/mL and 31 ng/mL (p < 0.001), respectively; and the median urine CypA levels were 0.24 ng/mL and 0.17 ng/mL (p = 0.035), respectively. This evidence concerns the gene PPIA and acute kidney injury.