Predoffing AOC
Abbreviations: AOC, area of contamination; BVM, bag-valve-mask ventilation; ETI, endotracheal intubation; LMA, laryngeal mask airway.Geometric mean of AOC calculated by exponentiating the mean of log-AOC, then subtracting 1. Therefore, the 95% CIs are not symmetric. See eTable 7 and eTable 8 in Relative difference calculated by exponentiating the mean difference of log-AOC and subtracting 1, then multiplying by 100%. For example, the relative difference of torso contamination reported in the overall model (−70.9%) is interpreted as, compared with control group, the use of aerosol box is associated with a 70.9% lower geometric mean of AOC.Compared with control group, use of aerosol box was significantly associated with a 77.5% overall decreased AOC to torso in airway practitioners (geometric mean AOC: 9.9 vs 1.4 mmVery few airway practitioners and airway assistants had contamination to the facial area across all 3 procedures (median [IQR] AOC = 0 [0-0] mm