Table 2 Univariate logistic regression analysis for postextubation upper airway obstruction symptoms

Intubation attempts ≥ 3 times

2.26

[0.57–8.91]

.24

Not calculated

Duration of Intubation

1.09

[0.96–1.24]

.17

1.08

[0.93–1.25]

.31

Transverse diameters of glottis

1.06

[0.73–1.54]

.76

0.59

[0.34–1.06]

.076

Transverse diameters of 5 mm under glottis

1.09

[0.86–1.38]

.46

0.90

[0.50–1.59]

.71

Transverse diameters of cricoid cartilage

0.98

[0.84–1.14]

.80

1.08

[0.85–1.37]

.52

Ratio of glottis/ tube OD^c < 1

Not calculated

4.44

[0.85–23.21]

.077