Table 1 Baseline characteristics before and after propensity score matching.

From: The link between initial cardiac rhythm and survival outcomes in in-hospital cardiac arrest using propensity score matching, adjustment, and weighting

Monitored rhythm

Before matching

 

After matching

P-value

Non-shockable

Shockable

P-value

Non-shockable

Shockable

N

1298

218

 

161

161

 

Age(years)

65.074 ± 16.823

66.177 ± 16.238

0.368

65.645 ± 16.736

65.243 ± 17.115

0.832

CPR duration(minutes)

35.547 ± 35.859

28.789 ± 38.614

 < 0.001

61.845 ± 42.571

30.689 ± 42.482

 < 0.001

ECPR

91 (7.011%)

24 (11.009%)

0.039

15 (9.317%)

16 (9.938%)

0.850

Male

780 (60.092%)

139 (63.761%)

0.305

104 (64.596%)

101 (62.733%)

0.728

Heart failure

300 (23.112%)

85 (38.991%)

 < 0.001

66 (40.994%)

54 (33.540%)

0.167

AMI

157 (12.096%)

62 (28.440%)

 < 0.001

37 (22.981%)

34 (21.118%)

0.687

Arrhythmia

203 (15.639%)

61 (27.982%)

 < 0.001

44 (27.329%)

40 (24.845%)

0.612

Hypotension

301 (23.190%)

56 (25.688%)

0.421

30 (18.634%)

42 (26.087%)

0.108

Respiratory insufficiency

945 (72.804%)

148 (67.890%)

0.134

106 (65.839%)

114 (70.807%)

0.338

Renal insufficiency

531 (40.909%)

96 (44.037%)

0.386

65 (40.373%)

75 (46.584%)

0.261

Regular dialysis

  

0.063

  

0.785

Yes

210 (16.179%)

49 (22.477%)

 

33 (20.497%)

35 (21.739%)

 

No

1086 (83.67%)

169 (77.52%)

 

128(79.503)

126(78.261)

 

Not recorded

2 (0.15%)

0

    

Hepatic insufficiency

247 (19.029%)

29 (13.303%)

0.043

21 (13.043%)

25 (15.528%)

0.524

Metabolic or electrolyte abnormality

219 (16.872%)

38 (17.431%)

0.839

19 (11.801%)

33 (20.497%)

0.034

Diabetes

402 (30.971%)

92 (42.202%)

0.001

64 (39.752%)

57 (35.404%)

0.421

Pneumonia

428 (32.974%)

60 (27.523%)

0.111

48 (29.814%)

48 (29.814%)

1.000

Bacteremia

106 (8.166%)

19 (8.716%)

0.785

14 (8.696%)

16 (9.938%)

0.701

Metastatic cancer or any blood borne malignancy

316 (24.345%)

22 (10.092%)

 < 0.001

18 (11.180%)

22 (13.665%)

0.499

Thrombocytopenia

157 (12.096%)

23 (10.550%)

0.514

7 (4.348%)

19 (11.801%)

0.014

Intracranial haemorrhage

32 (2.465%)

2 (0.917%)

0.153

1 (0.621%)

2 (1.242%)

0.562

Acute stroke

56 (4.314%)

11 (5.046%)

0.627

10 (6.211%)

9 (5.590%)

0.813

Arrest at night

816 (62.866%)

127 (58.257%)

0.194

106 (65.839%)

103 (63.975%)

0.726

Arrest on weekend

363 (27.966%)

69 (31.651%)

0.265

55 (34.161%)

53 (32.919%)

0.813

Arrest ___location

  

 < 0.001

  

0.333

ICU

557 (42.912%)

129 (59.174%)

 

78 (48.447%)

89 (55.280%)

 

GW

648 (49.923%)

74 (33.945%)

 

77 (47.826%)

62 (38.509%)

 

ED

41 (3.159%)

5 (2.294%)

 

2 (1.242%)

4 (2.484%)

 

Other locations

52 (4.006%)

10 (4.587%)

 

4 (2.484%)

6 (3.727%)

 

Witnessed arrest

877 (67.565%)

172 (78.899%)

 < 0.001

115 (71.429%)

121 (75.155%)

0.450

Mechanical ventilation

270 (20.801%)

54 (24.771%)

0.186

42 (26.087%)

38 (23.602%)

0.606

Antiarrhythmics

118 (9.091%)

42 (19.266%)

 < 0.001

27 (16.770%)

19 (11.801%)

0.203

Vasopressors

534 (41.140%)

105 (48.165%)

0.052

71 (44.099%)

72 (44.720%)

0.911

Intra-aortic balloon pumping

5 (0.385%)

10 (4.587%)

 < 0.001

0 (0.000%)

1 (0.621%)

 

Percutaneous coronary intervention

28 (2.157%)

30 (13.761%)

 < 0.001

9 (5.590%)

8 (4.969

0.803

  1. Continuous data are summarized as the mean (standard deviation) or median (interquartile range), whilst categorical variables are reported as percentages (%).
  2. ECPR Extracorporeal cardiopulmonary resuscitation; CPR Cardiopulmonary resuscitation; ICU Intensive care unit; GW General ward; ED Emergency department.
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