Fig. 2
From: Daily urinary urea excretion to guide intermittent hemodialysis weaning in critically ill patients
a Predictive ability for intermittent hemodialysis weaning. The area under the receiver operating characteristic curve values were 0.86 (0.79–0.94) for UO, 0.83 (0.74–0.92) for uUrea, and 0.96 (0.93–0.99) for eUrea. Thresholds with the highest accuracy are given for each variable. b Distribution of weaned and unweaned patients according to UO, uUrea, and eUrea. The blue curve corresponds to an eUrea of 1.35 mmol/kg/24 h and was obtained using the following equation: [UO (ml/kg/24 h)/1000] × uUrea (mmol/L) = 1.35 mmol/kg/24 h. eUrea daily urinary urea excretion, uUrea urinary urea concentration, UO urine output