We also aimed to determine the most appropriate cut-off values for CRP, PCT and MPV using receiver operating characteristic (ROC) curves and identify the diagnostic sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of each cut-off in early-onset preterm neonatal sepsis (EONS), late-onset preterm neonatal sepsis (LONS), proven and clinical preterm neonatal sepsis. Here, CRP is linked to Neonatal sepsis.