Table 5 Univariable Cox regression model for VAP

Total Cohort

Covid-19

5.78

2.72–12.25

< 0.01 *

Age

1

0.98–1.01

0.98

Sex (male)

1.13

0.65–1.97

0.67

days in ICU

1.03

1.02–1.04

< 0.01 *

ventilation days

1.01

1.00–1.02

0.012 *

Lung disease

0.47

0.19–1.19

0.11

Diabetes

1.04

0.54–1.97

0.91

Smoking

0.30

0.09–0.97

0.04 *

Cohort adjusted by days in ICU

Covid-19

3.074

1.28–7.33

0.02 *

Age

0.99

0.97–1.02

0.82

Sex (male)

1.05

0.46–2.34

0.90

days in ICU

1.08

1.02–1.14

< 0.01 *

ventilation days

1.09

1.02–1.17

0.01 *

Lung disease

0.41

0.09–1.71

0.21

Diabetes

1.11

0.44–2.77

0.82

Smoking

0.18

0.02–1.33

0.09

Cohort adjusted for ventilation days

Covid-19

3.52

1.15–10.81

0.03 *

Age

0.99

0.97–1.02

0.75

Sex (male)

0.74

0.28–1.94

0.55

days in ICU

1.03

0.99–1.06

0.06

ventilation days

1.12

1.01–1.22

0.03 *

Lung disease

0.29

0.04–2.18

0.22

Diabetes

0.46

0.11–2.02

0.31

Smoking

0.37

0.05–2.80

0.33