Table 2.

Tracheal intubation data for cervival spine rigidity scenario. Data are reported as median (IQR [range]) or as number (%)

	Macintosh	C-MAC	D-Blade	p value
Overall success rate (%)	21 (80.8)*†	26 (100)	26 (100)	0.007
Number of intubation attempts (%)
1	13 (50)	20 (76.9)	18 (69.2)	0.003
2	12 (42.3)	6 (23.1)	8 (30.8)
3		2 (7.7)	0	0
Summary	1.5 (1–2 [1–3])*†	1 (1–1 [1–2])	1 (1–2 [1–2])
Cormack and Lehane grade
1	3 (11.5)	21 (80.8)	22 (84.6)	<0.001
2	14 (53.8)	5 (19.2)	4 (15.4)
3	9 (34.6)	0	0
4	0	0	0
Summary	2 (2–3 [1–3])*†	1 (1–1 [1–2])	1 (1–1 [1–2])
POGO score	25 (0–70 [0–90])*†	90 (80–100 [30–100])	100 (85–100 [30–100])	<0.001
Number of optimization maneuvers (%)
0	14 (53.8)	24 (92.3)	26 (100)	<0.001
1	10 (38.8)	2 (7.7)	0
2		2 (7.7)	0	0
Summary	0 (0–1 [0–2])*†	0 (0–0 [0–1])	0 (0–0 [0–0])
Severity of dental compression (%)
0	0	4 (15.4)	10 (38.5)	<0.001
1	8 (30.8)	17 (65.4)	16 (61.5)
2	18 (69.2)	5 (19.2)	0
Summary	2 (1–2 [1–2])*†	1(1–1 [ 0–2 ])†	1 (0–1 [0–1])

^*p<0.05 compared with C-MAC laryngoscope;

^†p<0.05 compared with D-Blade laryngoscope.

POGO: Percentage of glottic opening