Table 4 Multivariable Cox regression model for HAI

Total Cohort

Covid-19

6.86

3.26–14.43

< 0.01 *

Age

0.98

0.97–1.01

0.15

Sex (male)

0.97

1.03–1.6

0.91

days in ICU

1.02

1.00–1.04

< 0.01 *

ventilation days

0.99

0.99–1.01

0.44

Lung disease

0.68

0.33–1.39

0.29

Diabetes

1.0247

0.57–1.83

0.93

Smoking

1.1147

0.52–2.37

0.77

Cohort adjusted by days in ICU

Covid-19

5.02

1.82–13.81

< 0.01 *

Age

0.96

0.94–0.99

0.04

Sex (male)

0.86

0.38–1.93

0.71

days in ICU

1.16

1.06–1.28

< 0.01 *

ventilation days

1.01

0.93–1.10

0.71

Lung disease

0.47

0.13–1.67

0.24

Diabetes

0.83

0.33–2.09

0.70

Smoking

1.12

0.24–5.12

0.88

Cohort adjusted for ventilation days

Covid-19

7.25

2.02–26.01

< 0.01 *

Age

0.97

0.93–1.01

0.11

Sex (male)

0.95

0.37–2.38

0.91

days in ICU

1.03

0.99–1.08

0.09

ventilation days

1.16

1.04–1.29

< 0.01 *

Lung disease

0.22

0.028–1.81

0.16

Diabetes

0.84

0.27–2.59

0.76

Smoking

0.67

0.14–3.02

0.60