Table 2 Participants’ pre and posttraining competency scores of tracheal intubation using optical stylets

Total score (29 is the full mark)

14.6 ± 3.7

25.3 ± 2.6

< 0.0001

 Anatomical identification

6.0 ± 1.4

9.5 ± 0.8

< 0.0001

 Hand-eye coordination

4.3 ± 1.4

7.8 ± 0.9

< 0.0001

 Optimized intubation condition

4.3 ± 2.0

8.1 ± 1.7

< 0.0001

Intubation time, second

54.7 ± 39.1

44.5 ± 19.7

0.130

Quality score (ratio of score to time)

0.44 ± 0.32

0.65 ± 0.25

0.005