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Table 2 The characteristics in the patients with neurological favourable outcome

From: Association between low pH and unfavorable neurological outcome among out-of-hospital cardiac arrest patients treated by extracorporeal CPR: a prospective observational cohort study in Japan

 

pH on blood gas analysis before ECPR started

Parameters

Tertile 1

Tertile 2

Tertile 3

(≥ 7.03)

(7.029–6.875)

(< 6.875)

(N = 24)

(N = 9)

(N = 8)

Men

19 (79.2%)

5 (55.6%)

7 (87.5%)

Age, years

62.5 (51.5–68.8)

58.0 (51.5–69.5)

50.5 (33.0–60.0)

  18-65 years

13 (54.2%)

6 (66.7%)

7 (87.5%)

  65–74

8 (33.3%)

3 (33.3%)

1 (12.5%)

≥ 75

3 (12.5%)

0 (0.0%)

0 (0.0%)

Cause of cardiac arrest

 Cardiac

21 (87.5%)

7 (77.8%)

8 (100%)

Pre-hospital information

 Bystander witness

14 (58.3%)

9 (100%)

7 (87.5%)

 Bystander CPR

10 (41.7%)

5 (55.6%)

4 (50%)

 Shockable on initial rhythm

18 (75%)

6 (66.7%)

7 (87.5%)

 Advanced airway

6 (54.5%)

0 (0.0%)

4 (80.0%)

In-hospital information

Cardiac rhythm on arrival

  ROSC

6 (25%)

2 (22.2%)

0 (0%)

  Shockable

15 (62.5%)

4 (44.4%)

6 (75%)

  Non-shockable

3 (12.5%)

3 (33.3%)

2 (25%)

pH value before ECPR start

7.14 (7.10–7.26)

6.96 (6.93–7.00)

6.75 (6.71–6.83)

Time course, min

  E-call to hospital arrival

29.5 (19.3–35.0)

27.5 (19.5–38.8)

25.5 (19.3–33.0)

  E-call to collect BGA

33 (26.8–41.3)

43 (31–51)

36 (32.3–45.8)

  E-call to start ECPR

63 (51–191.5)

48 (45.5–65.0)

49 (46.3–58.5)

  1. Continuous value is described as median and IQR. Categorical variables are number and percentage
  2. IQR interquartile range, CPR cardio-pulmonary resuscitation, ROSC return of spontaneous circulation, PEA pulseless electrical activity, BGA blood gas analysis, E-call call to the emergency service, ECPR extra-corporeal circulatory support during the CPR