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Table 1 Patient characteristics in the original cohort

From: In-hospital extracorporeal cardiopulmonary resuscitation for patients with out-of-hospital cardiac arrest: an analysis by time-dependent propensity score matching using a nationwide database in Japan

 

Initial shockable rhythm

Initial non-shockable rhythm

Characteristics

ECPR (N = 942)

Without ECPR (N = 2,108)

SMD

ECPR (N = 376)

Without ECPR (N = 29,855)

SMD

Sex (men)

811 (86%)

1,652 (78%)

0.20

289 (77%)

17,167 (58%)

0.42

Age

59 (48, 68)

69 (58, 79)

-0.68

60 (47, 69)

79 (68, 86)

-1.2

Witnessed

738 (78%)

1,465 (69%)

0.20

290 (77%)

11,232 (38%)

0.87

Bystander CPR

522 (55%)

1,076 (51%)

0.09

164 (44%)

14,350 (48%)

-0.09

Initial cardiac rhythm

  

0.00

  

0.80

Initial VF/VT

942 (100%)

2,108 (100%)

 

-

-

 

PEA

-

-

 

241 (64%)

8,141 (27%)

 

Asystole

-

-

 

135 (36%)

21,714 (73%)

 

Bystander AED

79 (8.4%)

114 (5.4%)

0.12

22 (5.9%)

260 (0.9%)

0.28

Physician-staffed heli/ambulance

249 (26%)

383 (18%)

0.20

87 (23%)

2,723 (9.1%)

0.39

Shock by paramedic

936 (99%)

2,046 (97%)

0.17

135 (36%)

1,315 (4.4%)

0.85

Advanced airway

  

0.12

  

0.03

Intubation

122 (13%)

201 (9.5%)

 

36 (9.6%)

3,084 (10%)

 

None

364 (39%)

905 (43%)

 

153 (41%)

12,361 (41%)

 

SGA

456 (48%)

1,002 (48%)

 

187 (50%)

14,410 (48%)

 

Number of IV adrenaline

  

0.10

  

0.17

0

554 (59%)

1,356 (64%)

 

231 (61%)

21,534 (72%)

 

1

123 (13%)

255 (12%)

 

38 (10%)

2,474 (8.3%)

 

2

102 (11%)

197 (9.3%)

 

45 (12%)

2,094 (7.0%)

 

3

91 (9.7%)

157 (7.4%)

 

36 (9.6%)

1,943 (6.5%)

 

4

36 (3.8%)

73 (3.5%)

 

21 (5.6%)

927 (3.1%)

 

5

36 (3.8%)

70 (3.3%)

 

5 (1.3%)

883 (3.0%)

 

Pre-hospital ROSC

73 (7.7%)

238 (11%)

-0.12

30 (8.0%)

1,048 (3.5%)

0.19

Time from call to hospital

31 (26, 39)

32 (26, 40)

-0.08

33 (27, 40)

33 (27, 40)

0.00

Initial cardiac rhythm on arrival

  

0.72

  

1.1

Asystole

154 (16%)

770 (37%)

 

111 (30%)

22,622 (76%)

 

PEA

167 (18%)

658 (31%)

 

172 (46%)

6,776 (23%)

 

VF/VT

621 (66%)

680 (32%)

 

93 (25%)

457 (1.5%)

 

Shock in hospital

724 (77%)

991 (47%)

0.65

200 (53%)

2,014 (6.7%)

1.2

Adrenaline in hospital

855 (91%)

1,915 (91%)

0.00

351 (93%)

26,191 (88%)

0.19

Intubation in hospital

809 (86%)

1,679 (80%)

0.17

334 (89%)

19,236 (64%)

0.60

ECPR case volume

  

0.51

  

0.55

High volume

688 (73%)

1,122 (53%)

 

274 (73%)

15,765 (53%)

 

Middle volume

209 (22%)

579 (27%)

 

85 (23%)

7,874 (26%)

 

Low volume

45 (4.8%)

407 (19%)

 

17 (4.5%)

6,216 (21%)

 
  1. Continuous variables are expressed as medians and interquartile ranges, and categorical variables are expressed as number and percentage (%)
  2. SMD, standardized mean difference; ECPR, extracorporeal cardiopulmonary resuscitation; CPR, cardiopulmonary resuscitation; VF, ventricular fibrillation; VT, ventricular tachycardia; PEA: pulseless electrical activity; ROSC, return of spontaneous circulation; AED, automated external defibrillator; SGA, supraglottic airway; IV, intravenous
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