IL6 and Sepsis: Among the tested sepsis biomarkers, IL-6 levels were most significantly correlated with NE-SFL (r = 0.57; p < 0.001) and NE-WY (r = 0.68; p < 0.001), followed by PCT (r = 0.56 and r = 0.59) and presepsin (r = 0.30 and r = 0.38, respectively) (Figure 4).