Transfer of skills and comparison of performance between king vision® video laryngoscope and macintosh blade following an AHA airway management course

Table 2 Demography by training groups

Variable/group	DL (n = 26)	VL (n = 25)	DL + VL (n = 23)	NT (n = 21)	P value^a
Sex (m/f)	14/12	17/8	11/12	11/10	0.52
Physicians/students	12/14	12/13	7/16	9/12	0.61
Operative profession, n (%)	4 (15)	3 (12)	3 (13)	4 (19)	0.94
Number of earlier courses^b	0 (0–1)	0 (0–2)	0 (0–1)	0 (0–1)	0.62
Years of experience^b	6 (4–10)	6 (3–11)	3 (3–7.5)	4 (2–9)	0.25
Prior observed intubations^b	0 (0–2)	0 (0–3)	0 (0–2)	0 (0–1)	0.43

DL direct laryngoscopy, NT-group not trained group, VL video laryngoscopy
^a P value was calculated with Fisher’s exact- or χ ²-test for categorical data and Kruskal-Wallis test for continuous data
^bResult as median (1st and 3rd quartile)

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