Table 1 Comparison of tracheal intubation at different C-L classifications.

From: A randomized controlled trail comparing the visual stylet and visual laryngoscope for transoral single lumen tracheal intubation

C-L classification

 

VS Group (N1)

VL Group (N2)

P value

Grade I (N1 = 32, N2 = 22)

Time of glottic exposure (s)

9.75 ± 0.76

10.09 ± 0.95

0.78

Time of intubation (s)

33.16 ± 0.95

39.55 ± 0.83

< 0.001

Grade IIa (N1 = 18, N2 = 28)

Time of glottic exposure (s)

11.56 ± 4.87

10.18 ± 8.15

0.23

Time of intubation (s)

34.5 (11)

39.5 (6.5)

0.05

Grade IIb (N1 = 22, N2 = 17)

Time of glottic exposure (s)

11.45 ± 0.98

12.12 ± 0.83

0.41

Time of intubation (s)

35.36 ± 1.23

42.12 ± 1

<0.001

Grade III (N1 = 3, N2 = 6)

Time of glottic exposure (s)

7.33 ± 0.67

16.67 ± 2.22

0.02

Time of intubation (s)

36 (3)

44.5 (6)

0.02

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