Variables

β

$s_{\overline{x}}$

Wald χ²

P value

HR (95% CI)

Time of ECMO (h)

<24

1.00

24 - 48

0.52

0.32

2.73

0.099

1.69 (0.91 - 3.14)

≥48

1.94

0.39

24.47

<0.001

6.99 (3.23 - 15.10)