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Table 1 Patient characteristics by study group classified using first monitored rhythm

From: The influence of excluding patients with bystander return of spontaneous circulation in the current OHCA database

Characteristics

All (n = 91,995)

Unknown rhythm (n = 2626)

Shockable group (n = 20,673)

Non-shockable group (n = 68,696)

Year, no. (%)

 2011

22,339

(24.3)

665

(25.3)

5077

(24.6)

16,597

(24.2)

 2012

22,566

(24.5)

575

(21.9)

5121

(24.8)

16,870

(24.6)

 2013

23,285

(25.3)

696

(26.5)

5252

(25.4)

17,337

(25.2)

 2014

23,805

(25.9)

690

(26.3)

5223

(25.3)

17,892

(26.0)

Age, median (25%, 75%)

 

79

(67, 86)

78

(66, 86)

67

(56, 77)

81

(72, 88)

Age category, no. (%)

 0–15 years

513

(0.6)

68

(2.6)

126

(0.6)

319

(0.5)

 16–45 years

4338

(4.7)

152

(5.8)

2328

(11.3)

1858

(2.7)

 45–74 years

31,562

(34.3)

820

(31.2)

11,770

(56.9)

18,972

(27.6)

 75 years

55,582

(60.4)

1586

(60.4)

6449

(31.2)

47,547

(69.2)

Sex, no. (%)

 Male

55,993

(60.9)

1503

(57.2)

16,348

(79.1)

38,142

(55.5)

Types of bystanders, no. (%)

 Family member

57,600

(62.6)

1099

(41.9)

10,882

(52.6)

45,619

(66.4)

Bystander interventions, no. (%)

 Conventional CPR

9219

(10.0)

449

(17.1)

2766

(13.4)

6004

(8.7)

 Chest-compression-only CPR

37,756

(41.0)

1482

(56.4)

9698

(46.9)

26,576

(38.7)

 PAD

3210

(3.5)

0

(0.0)

3210

(15.5)

0

(0.0)

Dispatcher’s intervention, no. (%)

 Dispatcher assistance

43,671

(47.5)

1087

(41.4)

10,148

(49.1)

32,436

(47.2)

Response interval, median (25%, 75%)

 

8

(7, 10)

8

(6, 10)

8

(6, 10)

9

(7, 11)

Outcomes, no. (%)

 Field ROSC

15,472

(16.8)

1765

(67.2)

7509

(36.3)

6198

(9.0)

 Favourable CPC

6932

(7.5)

1030

(39.2)

5003

(24.2)

899

(1.3)

  1. Abbreviations: CPR, cardiopulmonary resuscitation; PAD, public-access defibrillation; ROSC, return of spontaneous circulation; CPC, cerebral performance category
  2. Conventional CPR, CPR with rescue breathing; chest-compression-only CPR, CPR without rescue breathing
  3. Response interval: the time from 119 call to EMS contact with patients