Table 1 Blood gas analyses and partitioned respiratory mechanics of the AE-ILD-UIP and the ARDS population at different PEEP levels. Data are presented as median value and IQR

44.4 (39.7–50.7)

17.9 (9.9–23.3)

 < 0.0001

3.2 (2.5–5.7)

5.4 (4–7.4)

0.12

49 (43.9–54.7)

22 (16.8–28)

 < 0.0001

16.7 (14.8–19)

4.4 (2.9–6.3)

 < 0.0001

 − 4.3 (− 7.6– − 2.3)

 − 4.1 (− 7.6– − 2.9)

0.66

16.8 (13.8–19.3)

14.4 (11.5–21.2)

0.56

21.1 (17.8–23.6)

9.3 (7–11.5)

 < 0.0001

7.42 (7.41–7.42)

7.4 (7.37–7.41)

0.07

74 (66.5–80)

83 (75–89)

0.3

39.5 (38–45)

39 (36.8–40)

0.06

43.3 (36.8–53)

14.6 (12.2–19.1)

 < 0.0001

3.4 (2.3–5.6)

5.7 (4.3–8.3)

0.09

48.5 (40–56.8)

22.1 (19.1–25.2)

 < 0.0001

15.3 (11.3–18.7)

10.5 (5–14)

0.01

 − 2.6 (− 4.3– − 1.2)

 − 2.5 (− 4.6– − 0.5)

0.75

16.8 (14.3–18.6)

15.1 (11.9–21.4)

0.9

18.4 (15.6–21.8)

12.3 (8.5–16.6)

0.02

4 (4–4)

4 (4–5)

0.2

7.41 (7.38–7.42)

7.4 (7.36–7.42)

0.3

93.5 (73.3–107)

74.5 (68.3–80.5)

0.1

41 (38.5–42)

42 (39.8–47)

0.18

48.8 (59–42.8)

15.2 (12.4–19.7)

 < 0.0001

3.7 (3.2–5.9)

5.7 (4.7–7.2)

0.1

55.3 (45.9–62.5)

20.6 (19–24.5)

 < 0.0001

23.3 (21.3–26.7)

16.9 (13.5–19.2)

0.001

0.8 (0.3–1.5)

2.4 (0.6–4.9)

0.04

19.1 (16.1–21.6)

15.3 (9.4–17)

0.01

22.6 (20.8–25.8)

13.9 (6.6–16.5)

0.0001

12 (10–14)

14 (12––17.5)

0.03

7.38 (7.35–7.4)

7.37 (7.34–7.4)

0.34

80 (58–93)

105 (80–134)

0.01

42 (39.5–43.3)

45 (40–48)

0.08