Among non-septic AKI patients, urine CK-18 M30 did not show significant correlation at H24 with cell-free DNA (Spearman’s rho -0.223, P = 0.345) or HSP70 (Spearman’s rho 0.108, P = 0.650) or the severity of AKI (Spearman’s rho 0.194, P = 0.413). This evidence concerns the gene KRT18 and acute kidney injury.