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Table 1 Baseline characteristics, n = 155

From: Quality of cardiopulmonary resuscitation in out-of-hospital cardiac arrest before and after introduction of a mechanical chest compression device, LUCAS-2; a prospective, observational study

Cardiac arrest background variables
Age in years, mean (SD) 66 (±15), n = 146
Male gender 67% (92/138)
Place of cardiac arrest 81% (99/123)
Home 19% (23/123)
Public 1% (1/123)
EMS vehicle 81% (99/123)
Cardiac arrest witnessed 67% (83/124)
Layperson 53% (66/124)
Health care professional 5% (6/124)
EMS 9% (11/124)
Bystander CPR 74% (93/125)
Rhythm on arrival of EMS  
Asystole 40% (50/126)
PEA 24% (31/126)
VF/VT 33% (41/126)
Other 3% (4/126)
Proportion of AED analysis 98% (152/155)
+ defibrillation 47% (73/155)
- defibrillation 87% (135/155)
Defibrillation with AED before arrival of the EMS 0% (0/155)
  1. Continuous data presented as mean +/− SD, valid cases.
  2. Categorical variables presented as percentage (n/valid cases).
  3. EMS = Emergency medical service. Health care professional = EMS personnel, nurse, physician. CPR = cardiopulmonary resuscitation. PEA = Pulseless electrical activity. VF = Ventricular fibrillation. VT = Ventricular tachycardia. AED = Automated external defibrillator.