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Table 1 Characteristics of out-of-hospital cardiac arrest in Beijing

From: Trend in survival after out-of-hospital cardiac arrest and its relationship with bystander cardiopulmonary resuscitation: a six-year prospective observational study in Beijing

Characteristics

Overall

(n = 5042)

EMS attempted to resuscitate

(N = 2278)

EMS did not attempt to resuscitate

(N = 2764)

Transported to hospital with ROSC (N = 121)

Transported to hospital with ongoing bystander CPR (N = 392)

Age, median (IQR)

78 (63–85)

70 (57–80)

82 (73–87)

69 (55–79)

68 (57–80)

Gender

Male

3032 (60.1)

1574 (69.1)

1458 (52.7)

67 (55.4)

282 (71.9)

Female

2010 (39.9)

704 (30.9)

1306 (47.3)

54 (44.6)

110 (28.1)

Arrest location

At home

4319 (85.7)

1727 (75.8)

2592 (93.8)

83 (68.6)

299 (76.3)

At public place

723 (14.3)

551 (24.2)

172 (6.2)

38 (31.4)

93 (23.7)

Witnessed status

Non-witnessed

2837 (56.3)

854 (37.5)

1983 (71.8)

26 (21.5)

122 (31.1)

Witnessed

2203 (43.7)

1424 (62.5)

779 (28.2)

95 (78.5)

270 (68.9)

Bystander CPR

Yes

484 (9.6)

432 (19.0)

52 (1.9)

37 (30.6)

392 (100.0)

No

4558 (90.4)

1846 (81.0)

2712 (98.1)

84 (69.4)

0

Bystanders trained in CPR

Yes

469 (9.3)

319 (14.0)

150 (5.4)

37 (30.6)

223 (56.9)

No

4573 (90.7)

1959 (86.0)

2614 (94.6)

84 (69.4)

169 (43.1)

First monitored shockable rhythm

Yes

162 (3.2)

149 (6.5)

13 (0.5)

26 (21.5)

50 (12.8)

No

4880 (96.8)

2129 (93.5)

2751 (99.5)

95 (78.5)

342 (87.2)

Etiology

Cardiac

4452 (88.3)

2045 (89.8)

2407 (87.1)

104 (86.0)

358 (91.3)

Non-cardiac

590 (11.7)

233 (10.2)

357 (12.9)

17 (14.0)

34 (8.7)

Previous CVD

     

Yes

3249 (64.8)

1436 (63.0)

1929 (66.1)

58 (47.9)

261 (66.6)

No

1765 (35.2)

842 (37.0)

936 (33.9)

63 (52.1)

131 (33.4)

Response time (min), median (IQR)

15 (12–20)

15 (11–19)

16 (12–20)

14 (11–18)

15 (12–19)

Defibrillated by EMS

359 (7.1)

359 (15.8)

0

42 (35.6)

82 (20.9)

Any ROSC

Yes

95 (1.9)

86 (3.8)

9 (0.3)

19 (15.0)

25 (6.4)

No

4947 (98.1)

2191 (96.2)

2754 (99.7)

102 (85.0)

367 (93.6)

Survived event

Yes

121 (2.4)

118 (5.2)

3 (0.1)

121 (100.0)

37 (9.4)

No

4921 (97.6)

2160 (94.8)

2761 (99.9)

0

355 (90.6)

Survived to admission

Yes

78 (1.5)

78 (3.4)

0

75 (62.0)

24 (6.1)

No

4964 (98.5)

2200 (96.6)

2764 (100.0)

46 (38.0)

368 (93.9)

Survived to discharge

Yes

31 (0.6)

31 (1.4)

0

30 (24.8)

12 (3.1)

No

4983 (98.8)

2219 (97.4)

2764 (100.0)

65 (53.7)

377 (96.2)

Lost to follow-up

28 (0.6)

28 (1.2)

0

26 (21.5)

3 (0.8)

  1. Data are shown as frequency (percentage) or median (interquartile range). CPR, cardiopulmonary resuscitation; CVD, cardiovascular disease; IQR, interquartile range; ROSC, return of spontaneous circulation