Table 4.

Performance of urinary calprotectin and calprotectin/creatinine ratio for the detection of intrarenal acute kidney injury in the overall study population and after exclusion of urinary tract infection

Overall Study PopulationSubjects without Urinary Tract Infection
Calprotectin (ng/ml) (Cutoff, 300)Calprotectin (ng/ml)/Creatinine (g/L) (Cutoff, 500)Calprotectin (ng/ml) (Cutoff, 300)Calprotectin (ng/ml)/Creatinine (g/L) (Cutoff, 500)
Sensitivity (%)92.3%92.3%89.7%89.7%
Specificity (%)97.1%97.1%97.1%97.1%
Positive predictive value (%)98.0%98.0%96.3%96.3%
Negative predictive value (%)89.2%89.2%91.7%91.7%