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Table 1 Comparison of out-of-operating room intubations occurring during in-hospital cardiac arrest (IHCA) versus other emergent indications

From: Cardiac arrest is a predictor of difficult tracheal intubation independent of operator experience in hospitalized patients

 

All patients N = 420

IHCA N = 140

Non-IHCA N = 280

P-valuea

Age in years, mean (SD)

58 (16)

61 (16)

56 (15)

<.01

Male, n (%)

293 (70)

102 (73)

191 (68)

.30

BMI kg.m−2, median (IQR)

27 (23–33)

28 (24–34)

27 (23–33)

.43

Initial intubation technique, n (%)

   

<.01

 Direct laryngoscopy

371 (88)

133 (95)

238 (85)

 

 Glidescope

49 (12)

7 (5)

42 (15)

 

Initial glottic view, n (%)

   

.37

 Grade 1

291 (70)

91 (65)

200 (71)

 

 Grade 2

97 (23)

35 (25)

62 (22)

 

 Grade 3

25 (6)

10 (7)

15 (5)

 

 Grade 4

7 (2)

4 (3)

3 (1)

 

Operator Experience, n (%)

   

.06

 Junior

129 (31)

35 (25)

94 (34)

 

 Senior

291 (69)

105 (75)

186 (66)

 

First attempt success, n (%)

336 (78)

103 (74)

223 (80)

.16

Complications, n (%)

    

 Difficult intubationb

25 (6)

14 (10)

11 (4)

.01

 Aspiration

7 (2)

6 (4)

1 (0.5)

<.01

 Oesophageal intubation

5 (1)

0

5 (2)

.11

  1. SD: standard deviation; BMI: body mass index; IQR: interquartile range.
  2. aTwo sample t-test with assumption of unequal variance, Chi-square test or Wilcoxon rank sum test.
  3. bDifficult intubation is defined as ≥3 intubation attempts, >10 minutes in duration, or need for a surgical airway.