AED	automated external defibrillator
ALS	advanced life support
bCPR	CPR with ventilation and chest compressions
BLS	basic life support
CCs	chest compressions
CI	confidence interval
CPC	cerebral performance category
DNAR	do not attempt resuscitation
DNS	did not survive
EMS	emergency medical service
EuReCa TWO	European Registry of Cardiac Arrest Two
GDP	gross domestic product
IBM SPSS	International Business Machines Corporation Statistical Package for the Social Sciences
ID CA	identified cardiac arrest
ILCOR	International Liaison Committee on Resuscitation
OHCA	out-of-hospital cardiac arrest
PEA	pulseless electrical activity
ROSC	return of spontaneous circulation
S	survived
SD	standard deviation
STROBE	Strengthening the Reporting of Observational Studies in Epidemiology
Vent	ventilation
VF	ventricular fibrillation