Table 2 Primary and Secondary Outcomes

 Moderate hypoxia [n (%)]

3 (8.3)

17 (47.2)

−38.9 (−57.5, − 20.2)

0.18 (0.06, 0.55)

< 0.001

  Mild hypoxia

5 (13.9)

23 (63.9)

−50.0 (− 69.3, −30.7)

0.22 (0.09, 0.51)

< 0.001

  Severe hypoxia

0 (0.0)

9 (25.0)

−25.0 (−39.1, −10.9)

–

0.002

  Pulmonary aspiration

0 (0.0)

0 (0.0)

–

–

–

  Jaw-thrust

3 (8.3)

16 (44.4)

−36.1 (−54.7, −17.5)

0.19 (0.06, 0.59)

0.001

  Mask ventilation

0 (0.0)

6 (16.7)

−16.7 (−28.8, −4.5)

–

0.025

  Tracheal intubation

0 (0.0)

0 (0.0)

–

–

–

  Hypotension

7 (19.4)

7 (19.4)

0 (−18.3, 18.3)

1.00 (0.39, 2.56)

1.000

  Outcome

SJOV (n = 36)

nasal cannula (n = 36)

Absolute risk difference, (95% CI), %

SJOV vs. nasal cannula, Risk ratio (95% CI)

P value

  Hypertension

3 (8.3)

1 (2.8)

5.6 (−4.9, 16.1)

0.33 (0.04, 3.06)

0.614

  Bradycardia

8 (22.2)

11 (30.6)

−8.3 (−28.6, 11.9)

0.73 (0.33, 1.59)

0.422

  Tachycardia

0 (0.0)

0 (0.0)

–

–

–

  Fatal complications [n (%)] ^a

0 (0.0)

0 (0.0)

–

–

–

  Pharyngalgia

1 (2.8)

0 (0.0)

2.8 (−2.6, 8.1)

–

1.000

  Xerostomia

1 (2.8)

0 (0.0)

2.8 (−2.6, 8.1)

–

1.000

  Nasal bleeding

3 (8.3)

0 (0.0)

8.3 (−0.7, 17.4)

–

1.000

  Barotrauma

0 (0.0)

0 (0.0)

–

–

–