Table 2 The characteristics of patients on day 1

Age (years)

78 ± 6

76 ± 3

80 ± 2

0.228

Male (n (%))

14 (67)

5 (63)

9 (69)

<0.01

Height (cm)

169 ± 8

170 ± 9

169 ± 8

0.866

PBW (kg)

66 ± 7

66 ± 8

65 ± 7

0.866

SOFA

13 ± 2.6

10 ± 2

15 ± 2

<0.01

PEEP (cm H₂O)

10 ± 3

8 ± 2

11 ± 3

0.036

Crs (mL/cm H₂O)

34 ± 8

39 ± 8

31 ± 6

0.013

P/F (mmHg)

160 ± 42

184 ± 23

145 ± 45

0.019

VT (ml/kg PBW)

6.6 ± 0.5

6.4 ± 0.5

6.7 ± 0.5

0.109

LIS

2.8 ± 0.4

2.4 ± 0.3

3 ± 0.3

0.001

LUS

18.1 ± 5.3

15 ± 5

20 ± 5

0.022

EVLWI

16.8 ± 4.4

13 ± 3.6

19 ± 3

<0.01