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Table 1 Ventilatory parameters at 24 h and mortality in clinical studies comparing a protective strategy (Vt limitation) versus a control group (top panel), and a strategy of high PEEP versus low PEEP or minimal distension (lower panel) in patients with ARDS

From: Driving pressure: a marker of severity, a safety limit, or a goal for mechanical ventilation?

Author

Year

N

Vt

Ppl

PEEP

DP

Mort

Vt

Ppl

PEEP

DP

Mort

Dif DP

p b

Protective strategy

Control group

 Brochard

1998

108

7.1

25.7

10.7

15

46.6%

10.3

31.7

10.7

21

37.9%

6

NS

 Stewart

1998

120

7.2

22.3

8.6

13.7

48.0%

10.8

26.8

7.2

19.6

46.0%

5.9

NS

 Ranieria

1999

44

7.6

24.6

14.8a

9.8

38.0%

11.1

31

6.5

24.5

58.0%

14.7

0.19

 Brower

1999

52

7.3

27

9.3

17.7

50.0%

10.2

30

8.2

21.8

46.0%

4.1

NS

 Amatoa

1998

53

6

31.8

16.3a

15.5

38.0%

12

34.4

6.9

27.5

71.0%

12

<0.001

 ARDSnet

2000

861

6.1

25

9.4

15.6

31.0%

11.9

33

8.6

24.4

39.8%

8.8

0.007

High PEEP

Low PEEP

 ALVEOLI

2004

549

6.1

27

14.7

12.3

27.5%

6.0

24

9.1

14.9

24.9%

2.6

NS

 Mercat

2008

767

6.1

27.5

15.8

11.7

35.4%

6.1

21.1

8.4

12.7

39.0%

1.0

NS

 Meade

2008

983

6.8

30.2

15.6

14.6

36.4%

6.8

24.9

10.1

14.8

40.4%

0.2

NS

 Talmorc

2008

61

7.1

28

17

11

17%

6.8

25

10

15

39%

4.0

0.055

 Kacmarek

2016

200

5.6

27.9

15.8

11.8

22%

6.2

25.2

11.6

13.8

27%

2.0

0.18

  1. Driving pressure of the respiratory system (DP) is calculated as the difference between the plateau pressure (P pl ) and PEEP. Note that a larger difference in DP between groups (Dif DP) is associated with differences in mortality
  2. a Ranieri [37] and Amato [11] studies also use high PEEP in the protective strategy
  3. b The p value refers to the differences in mortality (Mort) between groups
  4. c Ventilatory parameters at 72 h