Nadir creatinine in posterior urethral valves: How high is low enough?

Patients with nadir creatinine >75 umol/l (0.85 mg/dl) should be considered at high risk for CRI, while patients with nadir creatinine ≤35 umol/l (0.4 mg/dl) should be considered low risk. Patients with nadir creatinine between these two values have an intermediate risk of CRI.Table. Diagnostic utility tests for identified nadir creatinine cut-off levels.Nadir creatinine cut-off (μmol/L)Sensitivity (%)Specificity (%)Positive predictive value (%)Negative predictive value (%)88.434.510010078.87548.310010081.73593.150.74594.4