Table 1 Patient characteristics stratified by fluid responders and non-responders at baseline

General characteristics

 Age, years

60 ± 17

61 ± 15

59 ± 18

0.50

 APACHE II score

23 ± 4

24 ± 4

22 ± 4

0.10

 Sex, male/female

34/16

19/8

15/8

0.70

Vital signs

 HR, beats/min^a

89 (68–100)

89 (68–116)

88 (64–95)

0.32

 SBP, mm Hg

92 ± 21

86 ± 23

99 ± 16

0.04

 CVP, mm Hg^a

5 (4–6)

5 (4–6)

5 (5–7)

0.40

Echocardiographic measurements

 LVEF, %

61.1 ± 11.9

62.2 ± 13.8

60.0 ± 9.5

0.33

 VTI, cm

30.9 ± 12.8

25.6 ± 13.8

37.1 ± 8.1

<0.01

 SV, ml^a

78.8 (50.8-97.4)

66.7 (39.5-83.1)

83.1 (74.1-119.7)

<0.01

 CO, l/min^a

8.2 (6.0-12.7)

7.2 (5.5-9.7)

9.7 (7.0-15.5)

0.05