IL18 and acute kidney injury: There was no difference in mean log urine IL-18 values in specimens obtained on AKI day (mean 1.22, 95% CI, −0.29 to 2.52; P=0.12) or before AKI day (mean 1.05, 95% CI, −0.64 to 2.74; P=0.22) compared with subjects without AKI.