Table 1 Intensive care scores and mechanical ventilation variables at the time of ICU admission

Age (yr)

51.7 (38.0–69.0)

43.1 (28.0–62.0)

56.4 (42.5–70.0)

<0.001

Male (n, %)

111 (72.1)

35 (64.8)

76 (76)

0.103

Charlson score

0.8 (0–1.0)

0.6 (0–1.0)

1.0 (0–1.0)

0.18

Body mass index >30 kg/m² (n, %)

23 (14.9)

7 (13.0)

16 (16.0)

0.79

Immunocompromised (n, %)

19 (12.3)

5 (9.3)

14 (14.0)

0.55

 pH

7.11 (6.97–7.24)

7.20 (7.07–7.31)

7.06 (6.92–7.18)

<0.001

 PaO₂/FiO₂ (mmHg)

144.9 (60.0–209.0)

146.7 (62.0–190.0)

144.0 (52.5–212.5)

0.21

 PaCO₂ (mmHg)

47.3 (32.0–59.0)

40.1 (31.0–51.0)

51.3 (32.5–67.5)

0.007

 HCO₃ ^- (mmol/L)

13.7 (10.2–17.7)

15.6 (13.2–18.4)

12.7 (9.1–16.6)

0.001

 Plateau pressure (cmH₂O)

29.5 (27.0–32.0)

28.5 (26.0–30.0)

30.0 (27.0–33.0)

0.06

 Lactate (mg/dL)

97.4 (56.0–125.1)

64.9 (40.0–75.0)

115.2 (75.3–144.4)

<0.001

 Hct (%)

39.4 (35.0–45.0)

39.6 (35.7–44.2)

39.3 (34.3–45.4)

0.93

Platelet count (× 10³/μL)

196.1 (147.0–242.0)

216.8 (153.0–280.0)

184.9 (124.5–224.0)

0.036

 Creatinine (mg/dL)

1.97 (1.09–1.95)

1.75 (0.98–1.90)

2.09 (1.14–2.06)

0.06

 Bilirubin (mg/dL)

1.02 (0.50–0.91)

0.80 (0.50–0.81)

1.13 (0.50–0.93)

0.09

 CRP

3.25 (0.31–2.15)

2.52 (0.22–1.21)

3.65 (0.33–3.28)

0.06

Vasopressors before ECMO (n, %)

134 (87.0)

26 (48.1)

81 (81.0)

0.21

 IHCA (n, %)

62 (40.3)

18 (33.3)

44 (44.0)

0.09

 OHCA (n, %)

53 (34.4)

12 (22.2)

41 (41.0)

0.031

SOFA score

9.8 (7.0–13.0)

8.7 (6.0–12.0)

10.5 (8.0–13.0)

0.004

SAVE score

–6.5 (–10.0– –3.0)

–3.2 (–7.0–2.0)

–8.3 (–11.0– –5.0)

<0.001