Finally, in the analysis aimed to evaluate the capacity of PTX3 to discriminate between complicated and uncomplicated PAA, we obtained an AUC of 0.65 (95% CI 0.54–0.77) and a cut-off point of 12.33, which associated a 51.72% sensitivity and a 72.73% specificity. Here, PTX3 is linked to pulmonary artery-aorta diameter ratio measurement.