Parameter

Grade I

Grade II

Grade III

Successful Intubations^**

N = 34 (34, 0, 0)^*

N = 64 (9, 28, 27)^*

N = 21 (2, 8, 11)^*

Failed Intubations^**

N = 0 (0, 0, 0)

N = 2 (0, 0, 2)

N = 3 (0, 3, 0)

True Intubating Time (T2) in seconds

Mean: 75.1 Median: 69.5 IQR: (53 - 91)

Mean: 92.7 Median: 85.0 IQR: (55 - 121)

Mean: 111.6 Median: 110 IQR: (75.5 - 137)

Kruskal-Wallis Test, P < 0.05 Post Hoc Analysis (Dunn’s Multiple Comparison Test)

Grade I vs Grade II P > 0.05

Grade II vs Grade III P > 0.05

Grade I vs Grade III P < 0.01

Visual Analog Scale (VAS)

Mean: 1.9 Median: 2 IQR: (1 - 2)

Mean: 3.2 Median: 3 IQR: (2 - 4)

Mean: 4.9 Median: 5 IQR: (4 - 6)

Kruskal-Wallis Test, P < 0.05 Post Hoc Analysis (Dunn’s Multiple Comparison Test)

Grade I vs Grade II P < 0.001

Grade I vs Grade III P < 0.01

Grade II vs Grade III P < 0.001

Intubation Success Rate # Success/# Total, %

34/34, 100%

64/66, 97.0%

21/24, 87.5%

Chi-Squared Test, P < 0.05 Post Hoc Analysis (Chi-Squared)

Grade I vs Grade II P = 0.31

Grade II vs Grade III P = 0.83

Grade I vs Grade III P = 0.03