Figure 3 Comparing ROC curves for serum NT-proBNP in patients with sepsis at the ages <1 year, 1–3 years, 4–6 years, And 7–18 years. The AUC with 95% CI values were 0.815(0.73–0.93), 812(0.69–0.92), respectively for ages <1 year, 1–3 years, 4–6 years, and 7–18 years. The sensitivity, specificity, and optimal cut-off values were analyzed, and determining the predictive cut-off value of the serum N-terminal proB-type natriuretic peptide (NT-proBNP) level for 28-day mortality in pediatric sepsis patients of different ages. The figure was generated using GraphPad software. (GraphPad Software, La Jolla, USA).