Table 4 Multivariate analyses of factors associated with endotracheal intubation in all patients and the elderly versus non-elderly

Age

n/a

n/a

n/a

n/a

0.93 (0.9-1.0)

0.021

Male sex

1.88 (1.0-3.7)

0.061

n/a

n/a

n/a

n/a

Day of symptoms

0.91 (0.8-1.0)

0.098

n/a

n/a

n/a

n/a

Body mass index

1.05 (1.0-1.1)

0.038

1.07 (1.0-1.2)

0.044

n/a

n/a

Systolic blood pressure

1.01 (1.0-1.0)

0.059

n/a

n/a

1.02 (1.0-1.0)

0.019

Pulse rate

1.02 (1.0-1.0)

0.016

n/a

n/a

1.03 (1.0-1.1)

0.005

Body temperature

n/a

n/a

n/a

n/a

2.05 (1.2-3.5)

0.006

Respiratory rate

1.04 (1.0-1.1)

0.078

n/a

n/a

n/a

n/a

Oxygen saturation

0.94 (0.9-1.0)

<0.001

0.91 (0.9-1.0)

<0.001

0.95 (0.9-1.0)

0.021

Glasgow Coma Scale score

0.81 (0.7-1.0)

0.015

0.71 (0.5-1.1)

0.111

0.76 (0.6-1.0)

0.028

Glomerular filtration rate

0.99 (1.0-1.0)

0.101

0.99 (1.0-1.0)

0.063

n/a

n/a

Platelet

n/a

n/a

1.00 (1.0-1.0)

0.093

n/a

n/a

Alanine aminotransferase

n/a

n/a

0.98 (1.0-1.0)

0.042

n/a

n/a

C-reactive protein

n/a

n/a

n/a

n/a

1.0 (1.0-1.0)

0.013

High flow nasal cannula

2.70 (1.3-5.4)

0.005

6.25 (2.3-17.0)

<0.001

n/a

n/a