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Table 1 Patient Characteristic

From: Association between initial body temperature on hospital arrival and neurological outcome among patients with out-of-hospital cardiac arrest: a multicenter cohort study (the CRITICAL study in Osaka, Japan)

Body temperature on arrival to hospital, °C

Overall

Missing

≦35.9

36.0–36.9

37.0≦

 
 

(n = 4468)

(n = 1150)

(n = 1932)

(n = 1100)

(n = 286)

P value*

Age, years, mean (SD)

70.28

(15.0)

71.81

(14.6)

70.1

(14.8)

69.1

(15.2)

69.8

(16.1)

0.001

Men, n (%)

2996

(67.1)

741

(64.4)

1264

(65.4)

781

(71.0)

210

(73.4)

0.001

First documented rhythm at EMS arrival, n (%)

< 0.001

 VF/pulseless VT

1072

(24.0)

269

(23.4)

482

(24.9)

284

(25.8)

37

(12.9)

 

 PEA/Asystole

3075

(68.8)

816

(71.0)

1304

(67.5)

733

(66.6)

222

(77.6)

 

 Others

321

(7.2)

65

(5.7)

146

(7.6)

83

(7.5)

27

(9.4)

 

 Bystander-initiated CPR, n (%)

1760

(39.4)

424

(36.9)

794

(41.1)

453

(41.2)

89

(31.1)

0.004

 Bystander-initiated AED, n (%)

153

(3.4)

27

(2.3)

71

(3.7)

47

(4.3)

8

(2.8)

0.462

Origin

 Cardiac, n (%)

3843

(86.0)

1015

(88.3)

1649

(85.4)

938

(85.3)

241

(84.3)

0.889

Non-Cardiac

0.006

 Cerebrovascular disease, n (%)

187

(4.2)

26

(2.3)

80

(5.9)

69

(9.9)

12

(6.2)

 

 Respiratory disease, n (%)

283

(6.3)

51

(4.4)

141

(10.4)

61

(8.8)

30

(15.4)

 

 Malignancy, n (%)

148

(3.3)

54

(4.7)

49

(3.6)

30

(4.3)

15

(7.7)

 

 Time from call to hospital, min (mean (SD))

35.8

(16. 5)

36.2

(16. 5)

35.1

(15.3)

36.8

(18.5)

34.6

(15.8)

0.018

Season, n (%)

< 0.001

 Spring

1070

(23.9)

250

(21.7)

494

(25.6)

265

(24.1)

61

(21.3)

 

 Summer

916

(20.5)

233

(20.3)

315

(16.3)

292

(26.5)

76

(26.6)

 

 Autumn

1117

(25.0)

299

(26.0)

469

(24.3)

285

(25.9)

64

(22.4)

 

 Winter

1365

(30.6)

368

(32.0)

654

(33.9)

258

(23.5)

85

(29.7)

 

BT measeurement site n, (%)

< 0.001

 Ear

674

(20.6)

N/A

564

(29.6)

78

(7.2)

32

(11.3)

 

 Rectal

71

(2.2)

N/A

28

(1.5)

22

(2.0)

21

(7.4)

 

 Urinary bladder

186

(5.7)

N/A

117

(6.1)

53

(4.9)

16

(5.7)

 

 Axillary

2035

(62.3)

N/A

1083

(56.8)

747

(69.2)

205

(72.7)

 

 Others

302

(9.2)

N/A

115

(6.0)

179

(16.6)

8

(2.8)

 
  1. *P value is caluculated for 3 temperature categories. EMS Emergency medical service, CPR Cardiopulmonary resuscitation, AED Automated external defibrillator, VF Ventricular fibrillation, VT Ventricular tachycardia, PEA Pulseless electrical activityr, SD Standard deviation, BT Body temperature, N/A Not applicable