Table 3 Mortality in the ICU: Cox regression

General characteristics

 Age

1.03

1.02‒1.05

<0.001

Comorbidities

 Chronic lung disease

1.3

0.9-1.8

0.2

 Chronic heart failure

1.4

0.9-2.1

0.13

 Chronic kidney injury

1.1

0.8‒1.8

0.5

 Diabetes

1.1

0.9‒1.4

0.4

 Ischemic heart disease

1.5

1.1‒2.1

0.01

 Hypertension

1.1

0.9‒1.4

0.5

 Immunosuppression

1.3

0.9‒1.8

0.1

Severity of illness

 APACHE II

1

0-9‒1.03

0.3

 SOFA

1.1

1.02‒1.1

0.004

 Shock at admission

0.88

0.7–1.2

0.4

 PaO2/FiO2 ratio

0.99

0.99–0.99

<0.001

Laboratory variables

 LDH (U/L)

1

0.99–1

0.3

 D-dimer (ng/ml)

1

1–1

0.2

 Lactate (mmol/L)

1

0.99–1.002

0.1

 Creatinine (mg/dL)

1

0.9.1.1

0.8

Intubation timing

 Early intubation

0.6

0.5‒0.8

<0.001