PTX3 and Sepsis: Song et al. showed that PTX3 at a cutoff level of 26.90 ng/mL provided a sensitivity of 88.9 (74.5–95.0) and a specificity of 49.5 (40.4–58.7) in predicting 28-day mortality in patients with sepsis, yielding an AUC of 0.734 (0.656–0.811) [13].