Table 3 Univariate and multivariate analyses of factors associated with in-ICU mortality among the 139 patients supported by peripheral VA ECMO

Age (years)

52 [45;59]

62 [57;67]

< 0.01

1.07 [1.03–1.11]

< 0.001

SAPS2 score

56 [45;67]

72 [48;81]

< 0.01

-

-

SOFA score

10 [7;12]

11 [8;13]

0.23

-

-

Center case-volume (VA ECMO/year)

< 30

20/87

12/52

0.28

30–100

52/87

36/52

-

-

> 100

15/87

4/52

ECMO duration (days)

6 [4;9]

7 [4;8]

0.6

-

-

F_SO_{2  day 1} (%)

65 [60;80]

70 [60;90]

0.11

-

-

F_SO_{2 day 2} (%)

65 [50;78]

70 [60;80]

0.02

-

-

F_SO_{2 day 3} (%)

70 [51;75]

75 [65;84]

< 0.01

-

-

F_SO_{2 mean (day 1−3)} (%)

67 [54;75]

72 [65;85]

< 0.01

1.03 [1.00-1.06]

0.039

F_SO_{2 day 1} > 70%*

51/87

34/52

0.48

-

-

F_SO_{2 day 2} > 70%*

49/87

37/49

0.03

-

-

F_SO_{2 day 3} > 70%*

47/86

35/46

0.02

-

-

F_SO_{2 day 1−3} > 70%*

39/87

33/52

0.04

-

-

Right radial P_aO_{2  day 1} (mmHg)

120 [88;183]

165 [82;242]

0.21

-

-

Right radial P_aO_{2  day 2} (mmHg)

99 [77;128]

114 [86;156]

0.06

-

-

Right radial P_aO_{2  day 3} (mmHg)

94 [81;120]

109 [82;162]

0.08

-

-

Right radial P_aO_{2  mean (day 1−3)} (mmHg)

111 [90;146]

141 [100;197]

0.01

1.03 [1.00-1.02]

0.023