Fig. 2

Incidence rates of VAE and VAE tiers. Incidence rates (columns) are represented as number of events per 1000 ventilator days. Error bars represent 95% confidence intervals. Abbreviations: VAE, ventilator-associated event; VAC, ventilator-associated condition; IVAC, infection-related ventilator-associated complication; PVAP, possible ventilator-associated pneumonia; IR, incidence rate. Categories: VAE-plus, patients with VAE; VAC-only, patients with VAC and without criteria of subsequent tiers; IVAC-plus, patients with IVAC criteria (including patients with PVAP); IVAC-only, patients with IVAC and without PVAP criteria; PVAP, patients with PVAP criteria