The AUC for the prediction of respiratory infections of these biomarkers were 0.692 (95% CI 0.532-0.861, P=0.044) for MPO-DNA complexes, 0.692 (95% CI 0.5251-0.859, P=0.044 for NE and 0.72 (95% CI 0.561.0.880, P=0.021) for IL-6 (47). Here, MPO is linked to respiratory tract infectious disorder.