Characteristics of study subjects
A total of 102 medical students, 33 (32%) of whom were female, were included. No student was excluded. The median age was 24 years (IQR: 23–25 years). The success rate was 65.7% using the top-down manoeuvre and 70.6% using the bottom-up manoeuvre, with no significant differences between the two groups with regard to success rates or time required for successful identification (Table 

IQR: interquartile range. P-values were calculated using Fisher’s exact test or the Mann − Whitney U test.“Time required” summarises the time taken by all participants. On the other hand, “Time required for success” summarises the time taken by successful participants only.