Table 3 Univariable Cox regression model for HAI

Total Cohort

Covid-19

6.66

3.52–12.62

< 0.01 *

Age

0.99

0.98–1.01

0.67

Sex (male)

1.21

0.76–1.93

0.41

days in ICU

1.29

1.02–1.04

< 0.01 *

ventilation days

1.012

1.01–1.02

< 0.01 *

Lung disease

0.62

0.31–1.23

0.16

Diabetes

1.07

0.62–1.83

0.79

Smoking

0.57

0.27–1.19

0.13

Cohort adjusted by days in ICU

Covid-19

3.235

1.50–6.97

< 0.01 *

Age

0.99

0.97–1.01

0.46

Sex (male)

0.97

0.48–1.97

0.93

days in ICU

1.10

1.05–1.15

< 0.01 *

ventilation days

1.12

1.06–1.19

< 0.01 *

Lung disease

0.48

0.14–1.58

0.23

Diabetes

1.37

0.63–2.96

0.41

Smoking

0.27

0.06–1.16

0.07

Cohort adjusted for ventilation days

Covid-19

5.11

1.73–15.11

< 0.01 *

Age

0.98

0.96–1.01

0.40

Sex (male)

0.91

0.38–2.11

0.83

days in ICU

1.03

1–1.06

0.04 *

ventilation days

1.13

1.04–1.22

< 0.01 *

Lung disease

0.22

0.03–1.67

0.15

Diabetes

0.78

0.26–2.31

0.66

Smoking

0.59

0.13–2.53

0.48