Table 4 Multivariate Regression Model for first attempt success

Video laryngoscope as first device*

7.67

3.18 to 18.45

<0.001

Age

1.02

1.00 to 1.04

0.04

Gender**

2.09

1.07 to 4.07

0.02

Method

  No Medications

(Reference)

  RSI

0.72

0.08 to 6.00

0.76

  Sedation only

0.24

0.02 to 2.42

0.22

Operator Specialty

  Non-intensivist

(Reference)

  Pulmonary and Critical Care Medicine

5.59

1.09 to 28.64

0.04

Operator PGY

  1

(Reference)

  2

3.19

0.97 to 10.51

0.06

  3

0.66

0.20 to 2.13

0.48

  4

0.53

0.06 to 4.33

0.55

  5

0.36

0.04 to 3.22

0.36

  6

0.51

0.05 to 4.88

0.56

  Attending

3.0

0.11 to 77.74

0.51

Difficult Airway Predictors

  Total DACs

0.44

0.13 to 1.51

0.20

  Blood

1.79

0.39 to 8.33

0.45

  Vomit

0.84

0.15 to 4.66

0.84

  Cervical Immobilization

6.79

0.36 to 125.46

0.20

  Airway edema

0.60

0.11 to 3.25

0.55

  Small mandible

1.05

0.22 to 5.03

0.95

  Obesity

1.39

0.29 to 6.77

0.68

Large tongue

3.31

0.64 to 17.09

0.15

Short neck

1.63

0.36 to 7.25

0.52

Hemodynamic instability

1.58

0.37 to 6.46

0.52

  Hypoxemia

2.78

0.65 to 11.85

0.16

  Limited mouth opening

2.74

0.45 to 16.65

0.27

  Secretions

1.46

0.27 to 7.7

0.65