A Retrospective Study: Quick Scoring of Symptoms to Estimate the Risk of Cardiac Arrest in the Emergency Department

Table 1

Variables collected from the electronic health records of Peking University Third Hospital.

Patient variables	Age
	Gender
	Hospitalization information such as time of first medical contact and visiting pattern
	Underlying diseases
Arrest variables	Vital signs before CA, including temperature, heart rate, blood pressure, and blood oxygen saturation
	Laboratory tests such as routine blood test, coagulation function, and inflammatory factors
	Exact time and location of the attack
	Initial ECG rhythms (shockable rhythm and nonshockable rhythm)
	Witness or bystander CPR
	Rescue measures, including CPR, defibrillation, auxiliary ventilation, and resuscitation drugs
Outcome variables	Admission survival, ROSC, and survival to discharge
	Neurological outcome at discharge
	Presumed etiology of CA or preliminary diagnosis of non-CA patients
Prodromal symptoms	Dyspnea, chest pain, abdominal pain, backache, syncope, cold sweat, and palpitation