Table 1 Patient and operator demographics

Mean Age, years

59.5 (IQR 23 to 90 )

57.7 to 61.3

61.8 (IQR 40 to 82)

58.0 to 65.7

0.27*

Gender

0.46

 Male

56.0% (131)

45.7 to 65.9

50.0% (28)

38.8 to 59.1

DACs

 Total DACs (median)

2

IQR 1 to 3

1

IQR 1 to 2

0.18

 None

21.0% (49)

16.1 to 26.9

21.4% (12)

10.9 to 32.8

0.52

 Cervical immobilization

1.7% (4)

0.4 to 4.3

5.4% (3)

1.2 to 14.9

0.13

 Blood in Airway

19.2% (45)

14.4 to 24.9

8.9% (5)

3.0 to 19.6

0.07

 Vomit in Airway

6.0% (14)

3.3 to 9.8

7.1% (4)

2.0 to 17.3

0.76

 Facial/neck Trauma

0.43% (1)

0.01 to 2.3

0% (0)

0 to 6.4

1.00

 Obesity

29.5% (69)

23.7 to 35.8

17.86% (10)

8.9 to 30.4

0.10

 Short Neck

28.2 % (66)

22.5 to 34.4

19.6% (11)

10.2 to 32.4

0.24

 Large Tongue

16.2% (38)

11.8 to 21.6

14.3% (8)

6.4 to 26.2

0.84

 Airway Edema

8.6% (20)

5.2 to 12.9

10.7% (6)

4.0 to 21.9

0.61

 Small Mandible

16.2% (38)

11.8 to 21.6

28.6% (16)

17.3 to 42.2

0.05

 Limited Mouth Opening

8.2% (19)

5.0 to 12.4

3.6% (2)

0.4 to 12.3

0.39

 Secretions

11.5% (27)

7.4 to 15.9

3.6% (2)

0.4 to 12.3

0.04

 Hemodynamic Instability

26.5% (62)

21.0 to 32.6

16.1% (9)

7.6 to 28.3

0.12

 Hypoxemia

27.8% (65)

22.1 to 34.0

34.0% (19)

21.8 to 47.8

0.41

Reason for Intubation

0.42

 Airway Protection

20.1% (47)

15.4 to 26.0

21.4% (12)

11.6 to 34.4

0.85

 Respiratory Failure

65.0% (152)

58.5 to 71.1

60.7% (34)

46.8 to 73.5

0.64

 Cardiac Arrest

1.7% (4)

0.5 to 4.3

7.1% (4)

2.0 to 17.3

0.05

 Patient Control

1.3% (3)

0.3 to 3.7

1.8% (1)

0.05 to 9.6

0.58

 Hypoxemia

9.0% (21)

5.6 to 13.4

7.1% (4)

2.0 to 17.3

0.80

 Hemodynamic Instability

1.7% (4)

0.5 to 2.3

1.8% (1)

0.05 to 9.6

1.0

 Severe Acidosis

1.3% (3)

0.3 to 3.7

0% (0)

0.0 to 6.0

1.0

Method of Intubation

<0.001

 RSI

76.5% (179)

70.5 to 81.8

86.0% (48)

73.8 to 93.6

0.15

 SED

22.7% (53)

17.5 to 28.6

3.6% (2)

0.4 to 12.3

0.0005

 OTI

0.9% (2)

0.1 to 3.0

10.7% (6)

0.4 to 21.9

0.0008

Operator Specialty

<0.001

 Internal Medicine

28.2% (66)

22.5 to 34.4

12.5% (7)

5.2 to 24.1

0.02

 Emergency Medicine

13.7% (32)

9.5 to 18.8

35.7% (20)

23.4 to 49.6

0.0003

 Pulmonary/Critical Care

51.7% (121)

45.1 to 58.3

32.1% (18)

20.3 to 46.0

0.01

 Critical Care Medicine

6.4% (15)

3.6 to 10.4

19.6% (11)

10.2 to 32.4

0.006

Operator PGY Level

0.001

 1

9.4% (22)

5.9 to 13.8

7.1% (4)

2.0 to 17.3

0.80

 2

17.1% (40)

12.5 to 22.5

37.5% (21)

25.0 to 51.5

0.001

 3

15.4% (36)

11.0 to 20.7

3.6% (2)

0.4 to 12.3

0.01

 4

21.8% (51)

16.7 to 27.6

28.6% (16)

17.3 to 42.2

0.29

 5

25.2% (59)

19.8 to 31.3

19.6% (11)

10.2 to 32.4

0.49

 6

9.4% (22)

6.0 to 13.9

0.0% (0)

0.0 to 6.4

0.01

Attending

1.7% (4)

0.5 to 4.3

3.6% (2)

0.4 to 12.3

0.33