Fig. 2From: Analysis of tracheal intubation in out-of-hospital helicopter emergency medicine recorded by video laryngoscopySubjective level of difficulty [score range from 1 (very easy) to 10 (extremely difficult)] depending on work experience in anaesthesiology, number of in-hospital intubations during the past year, number of out-of-hospital intubations during the past year and total number of intubations with C-MAC by the corresponding providerBack to article page