Panel 1.

National emergency department performance index (EPI)

Index	Data necessary of calculation	The method used for calculation
The percentages of patients were disposed during 6-hour	the number of patients were disposed in 6 hours; the total number of patients hospitalized temporarily; the time of admission into the emergency ward; the time of disposition	the ratio of patients hospitalized temporarily in the emergency ward, whose cases were disposed in 6 hours to the total number of patients hospitalized temporarily in the emergency ward
The percentage of patients leaving the ED 1 in a 12-hour	the number of patients hospitalized temporarily in the emergency ward; the times of admission into and discharge from the emergency ward	the ratio of patients hospitalized temporarily in the emergency ward, whose cases were disposed in 12 hours from the admission and discharged to the total number of patients hospitalized temporarily in the emergency ward
Unsuccessful CPRs 2	The total number of CPRs; the number unsuccessful CPRs	the ratio of the number of unsuccessful CPRs to the total number of CPRs at a time interval; successful CPR was defined as cases in which the patient had spontaneous circulation and did not need CPR again for at least 20 minutes
Discharge against medical advice	the number of patients hospitalized temporarily; the number of patients discharge against medical advice	the ratio of patients discharge against medical advice despite the advice of the emergency physician to the total number of patients hospitalized temporarily in the emergency ward
Mean time of triage	duration of triage; triage level; the total number of the patients in the same triage level	the ratio of the total duration of patient triage to the total number of patients in the same triage level

¹: Emergency department;

²: Cardiopulmonary resuscitations