Table 1 Primary and secondary outcomes by the type of airway during cardiopulmonary resuscitation

The first CPR-intubation sequence

  Number of EMT-P

54

54

  CCF (%), median (IQR)^a

79.6 (73.9–85.0)

85.1 (81.8–90.0)

  Compression depth (cm), median (IQR)^a

5.2 (4.9–5.4)

5.4 (5.1–5.6)

  Compression rate (bpm), median (IQR)^a

102.0 (95.0–106.0)

102.0 (98.0–105.0)

  The longest interruption (second), median (IQR)^a

4.0 (3.0–6.0)

3.0 (2.0–4.0)

  Intubation time (second), median (IQR)^a

13.0 (8.0–16.0)

10.0 (7.0–14.0)

  Successful intubation, n (%)^b

19 (35.2)

43 (79.6)

  Esophageal intubation, n

0

1

The second CPR-intubation sequence

  Number of EMT-P

35

10

  CCF (%), median (IQR)^c

80.0 (68.6–85.0)

84.5 (75.0–90.0)

  Compression depth (cm), median (IQR)^c

5.2 (4.9–5.4)

5.3 (5.0–5.5)

  Compression rate (bpm), median (IQR)^c

101.0 (95.3–105.0)

100.5 (95.0–104.0)

  The longest interruption (second), median (IQR)^c

4.0 (3.0–7.0)

4.0 (2.0–5.0)

  Intubation time (second), median (IQR)^c

12.0 (9.0–17.8)

11.5 (11.0–14.0)

  Successful intubation, n (%)^d

16 (45.7)

6 (60.0)

  Esophageal intubation, n

1

1

The third CPR-intubation sequence

  Number of EMT-P

18

3

  CCF (%), median (IQR) ^c

77.3 (66.7–81.8)

84.2 (79.0–88.9)

  Compression depth (cm), median (IQR)^c

5.0 (4.8–5.5)

4.8 (4.8–5.0)

  Compression rate (bpm), median (IQR)^c

97.5 (94.0–104.0)

104.0 (97.3–107.8)

  The longest interruption (second), median (IQR)^c

6.0 (5.0–8.0)

3.0 (2.3–5.3)

  Intubation time (second), median (IQR)^c

16.5 (14.0–20.0)

9.0 (6.0–10.5)

  Successful intubation, n (%)^d

9 (50.0)

3 (100.0)

  Esophageal intubation, n

2

0

Failure of all three CPR-intubation sequences

7 (13.0)

0 (0)