IL6 and ventilator-associated pneumonia: Notably, the ROC (receiver operating characteristic) analysis showed that the non-inflammatory absolute IL-6 levels alone, already at baseline (Supplementary Fig. 8A), especially at 8 h post AIT launch (Supplementary Fig. 8B), presented outstanding diagnostic power (as categorized elsewhere78) to distinguish VAP and HC with an area under the curve (AUC) of up to 0.9941 (Supplementary Fig. 8A-D).