Table 1 Characteristics of the samples studied

EDLOS

 < 2 h

1521

2.5

 ≧ 2 and < 6 h

9740

16.3

 ≧ 6 and < 24 h

23,864

41.1

 ≧ 24 and < 48 h

14,219

23.8

 ≧ 48 h

9729

16.3

Gender

 Female

23,350

39.5

 Male

35,723

60.5

Age (years)

 20–34

4933

8.4

 35–49

8467

14.3

 50–65

16,533

28

 >=65

29,140

49.3

Triage Classification Levels

 Lv.1

6990

11.8

 Lv.2

18,433

31.2

 Lv.3

31,733

53.7

 Lv.4

1703

2.9

 Lv.5

214

0.4

Way of Arrival to Emergency Department

 Self-Arrival

34,351

58.2

 Referred Self-Arrival

13,565

23

 119 Ambulance

5117

8.7

 Private Ambulance

961

1.6

 Transferred from Outpatient Department

5036

8.5

Other

41

0.1

Comorbidity

 Y

20,398

34.5

 N

38,675

65.5

Experience for Specialist Attending Physician

 <=5 years

676

1.1

 6–10 years

13,936

23.6

 11–15 years

15,241

25.8

 >=16 years

29,114

49.5

Patient Arrival Time

 Weekday

43,377

73.4

 Holiday

15,696

26.6

Emergency Department Shift

 Day Shift

30,757

52.1

 Night shift

21,274

36

 Graveyard shift

7042

11.9