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Table 2 Characteristics of the ROSC (–) versus ROSC ( +) patients with traumatic prehospital cardiac arrest

From: Outcomes of prehospital traumatic cardiac arrest managed by helicopter emergency medical service personnel in Japan: a registry data analysis

Characteristicsa

ROSC (–)b

(n = 569)

ROSC ( +)b

(n = 153)

p-valuec

Age, median (IQR), years

67 (47, 79)

61.5 (43, 75)

0.10

Sex, n (%)

  

0.69

 Male

296 (76.3)

78 (78.8)

 

 Female

92 (23.7)

21 (21.2)

 

Type of injury, n (%)

  

0.24

 Blunt

350 (90.4)

90 (88.2)

 

 Penetrating

27 (7.0)

6 (5.9)

 

 Others

10 (2.6)

6 (5.9)

 

Time, median (IQR), minute

 HEMS call ~ HEMS contact patients

21 (17, 28)

23 (18, 30)

0.43

 HEMS stay at scene

22 (16, 27)

22.5 (16, 28)

0.64

 HEMS call ~ hospital arrival

53 (45, 66)

54 (46, 66)

0.62

AIS, median (IQR)

 Head (n = 281)

2 (0, 5)

1 (0, 4)

0.53

 Face (n = 279)

0 (0, 0)

0 (0, 0)

0.50

 Chest (n = 284)

4 (0, 5)

3 (0, 5)

0.94

  Abdomen (n = 290)

0 (0, 2)

0 (0, 3)

0.52

  Limbs (n = 288)

0 (0, 3)

2 (0, 3)

0.04

 Skin (n = 282)

0 (0, 1)

0 (0, 1)

0.27

Interventions, n (%)

 EMS crew

   

  Intravenous route

97/538 (18.0)

31/144 (21.5)

0.34

  Epinephrine

57/536 (10.6)

11/142 (7.7)

0.35

  Endotracheal intubation

17/535 (3.2)

6/145 (4.1)

0.60

 HEMS crew

   

  Chest drainage

131/569 (23.0)

12/153 (7.8)

 < 0.001

  Vasopressor agentsd

441/569 (77.5)

96/153 (62.7)

 < 0.001

  Bicarbonate

4/569 (0.7)

4/153 (2.6)

0.07

  Hemostatic agentse

43/569 (7.6)

21/153 (13.7)

0.02

  Endotracheal intubation

445/565 (78.8)

106/153 (69.3)

0.02

  Resuscitative Thoracotomy

195/569 (34.3)

20/153 (13.1)

 < 0.001

  Blood transfusion

10/569 (1.8)

2/153 (1.3)

1.00

  1. AIS abbreviated injury scale, EMS emergency medical service, HEMS helicopter emergency medical service, IQR interquartile range, ROSC return of spontaneous circulation
  2. aCategorical variables are presented as counts and percentages (%), whereas numerical variables are presented as medians and interquartile ranges (IQR)
  3. bFifty-nine out of 781 cases had missing data for ROSC
  4. cThe results were statistically significant based on p < 0.05
  5. dVasopressor agents included epinephrine, norepinephrine, phenylephrine, and dopamine
  6. eHemostatic agents included tranexamic acid and carbazochrome sodium sulfonate