Table 1.

The variables needed to calculate each predictive score

Predictive scores	Age	Initial rhythm upon arrival of EMS	Time from cardiac arrest to CPR	Time from CPR start to ROSC	pH of arterial blood	Lactate	Motor score on the GCS upon arrival at the hospital	Other
OHCA score		○	○	○		○		Serum creatinine
NULL-PLEASE score	○	○		○	○	○		Witness of cardiac arrest
								Bystander CPR
								CPR upon arrival at the hospital
								Cause of cardiac arrest
								End stage renal failure
CAST score		○		○	○	○	○	Serum albumin
								Hemoglobin
								Attenuation on brain CT
rCAST score		○			○	○	○	Time from witnessed time to ROSC
CAHP score	○	○	○	○	○			Epinephrine dose
								Site where cardiac arrest occurred

All laboratory data (pH, lactate, albumin, hemoglobin, serum creatinine) were taken on arrival at the hospital

OHCA score out-of-hospital cardiac arrest score, NULL-PLEASE score non-shockable rhythm, unwitnessed arrest, long no-flow or long low-flow period, blood pH < 7.2, lactate > 7.0 mmol/L, end-stage chronic kidney disease, age ≥ 85 years, still resuscitation, and extracardiac cause score

CAST score post-cardiac arrest syndrome for therapeutic hypothermia score, rCAST score revised post-cardiac arrest syndrome for therapeutic hypothermia score, CAHP score cardiac arrest hospital prognosis score, EMS emergency medical services, CPR cardiopulmonary resuscitation, ROSC return of spontaneous circulation, GCS Glasgow coma scale, CT computed tomography