Table 2 Association between surge and risk of invasive mechanical ventilation

Age (+ 10 years)^a

0.92

0.912

2.75

2.69–2.81

0.84

0.83–0.84

Male sex

1.23

1.20–1.26

1.08

1.03–1.13

0.84

0.83–0.86

Arterial hypertension

1.24

1.21–1.27

0.75

0.72–0.78

0.95

0.93–0.96

Diabetes mellitus

1.03

0.99–1.08

1.30

1.20–1.42

0.92

0.87–0.96

Heart disease

0.96

0.92–0.99

1.11

1.05–1.17

0.96

0.93–0.99

Lung disease

1.01

0.98–1.04

1.16

1.08–1.23

0.94

0.92–0.97

Cirrhosis

0.84

0.76–0.93

2.33

1.92–2.82

0.89

0.80–0.99

Cancer

0.51

0.47–0.56

2.13

1.93–2.36

1.09

1.02–1.16

Hematological malignancies

0.88

0.82–0.94

1.21

1.07–1.36

0.97

0.90–1.05

Chronic kidney disease

0.67

0.65–0.70

1.21

1.13–1.29

1.19

1.15–1.24

Immunosuppression

0.83

0.79–0.87

1.88

1.73–2.05

0.90

0.86–0.95

Modified SAPS II

 ≤ 14

Ref

Ref

Ref

 15–20

2.14

2.06–2.23

1.30

1.23–1.38

0.63

0.62–0.64

 21–28

3.70

3.56–3.85

1.51

1.42–1.61

0.41

0.40–0.42

 ≥ 28

6.96

6.71–7.22

1.70

1.60–1.81

0.18

0.17–0.18

Surge

 First

Ref

Ref

Ref

 Second

0.64

0.62–0.66

1.24

1.17–1.32

1.27

1.24–1.30

 Third

0.62

0.61–0.64

1.47

1.39–1.55

1.22

1.19–1.25