Real-time feedback, debriefing, and retraining system of cardiopulmonary resuscitation for out-of-hospital cardiac arrests: a study protocol for a cluster parallel-group randomized controlled trial

Table 3 Treatment assignment and data collection

	Assessments and procedures	Before starting trial	Enrollment (location of CPR)	During CPR	Hospitalization
Fire department	Treatment assigned	X
Emergency ambulance crew profile	Experience (years)	X^a
Emergency ambulance crew profile	Qualification as emergency medical technician	X^a
Patient profile	Informed consent		X^b	X^b	X ^b
	Sex				X
	Age				X
	Witnessing cardiac arrest				X
	Site of cardiac arrest				X
	Bystander CPR				X
	Initial electrocardiogram waveform				X
	Survival confirmation				X
	Discharge from hospital				X
	CPC				X
Quality of CPR	Chest compression fraction			Automatically collected during resuscitation
	Depth and speed of chest compressions
	Ventilation-related data

ISSN: 1745-6215