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Patients who had an ETT had significantly higher mean LE compared to patients with LMA. There were 36 patients with an ETT and had mean LE of 78.7%, compared to 46 patients with an LMA who had a mean LE of 73.3%. Statistics performed by one-tailed unpaired t-test, comparing mean LE of both groups (**p < 0.01). Error bars show standard error of the mean. The y-axis starts from 50 to better illustrate differences between groups. ETT = endotracheal tube; LMA = laryngeal mask airway.
