Fig. 3From: Comparing methods to secure a tracheal tube placed via a surgical cricothyroidotomy: a randomised controlled study in cadaversVisual Analogue Scale of technique difficulty. The boxplots show medians (solid line), means (X) and interquartile ranges (IQR). The whiskers give the range except for “outliers” that are more than ± 1.5 times the IQR.Back to article page