Table 2 Baseline characteristics

Age, year, mean (SD)

66.2

(20.2)

 Children aged 0–17 years old, n (%)

15

(2.3)

Male, n (%)

406

(61.8)

Cause, n (%)

 Cardiac

331

(50.4)

  Acute coronary syndrome

159

(24.2)

  Other heart disease

21

(3.2)

  Presumed cardiac cause

151

(23.0)

 Non-cardiac

326

(49.6)

  Cerebrovascular disease

18

(2.7)

  Respiratory disease

31

(4.7)

  Malignant tumor

8

(1.2)

  External

216

(32.9)

   Traffic injury

38

(5.8)

   Fall

54

(8.2)

   Hanging

26

(4.0)

   Drowning

23

(3.5)

   Asphyxia

57

(8.7)

   Drug overuse

5

(0.8)

   Other external cause

13

(2.0)

 Others

53

(8.1)

  SIDS (only for children)

3

(0.5)

Departure of ambulance or helicopter with physicians, n (%)

107

(16.3)

ROSC status, n (%)

 ROSC after hospital arrival

187

(28.5)

 ROSC before hospital arrival

55

(8.4)

 No ROSC

415

(63.2)

First documented rhythm after hospital arrival, n (%)

 VF/pulseless VT

21

(3.2)

 PEA

148

(22.5)

 Asystole

435

(66.2)

 Presence of pulse

53

(8.1)