Table 2 Characteristics of 48-h unscheduled related return patients discharged from the ED

Incidence of return visits with subsequent admission

44.5

41.1

 − 5.05 to 11.78

Age

  15–30 years

  31–45 years

  45–60 years

  61–75 years

   > 75 years

20.8

16.6

19.6

24.9

18.1

26.7

16.7

16.3

23.3

17.1

 − 1.39 to 13.14

 − 6.29 to 6.52

 − 3.31 to 9.86

 − 5.73 to 8.89

 − 5.56 to 7.53

Sex

  Male

  Female

46

54

46.9

53.1

 − 7.59 to 9.37

 − 7.59 to 9.37

Initial diagnosis category

  Trauma

  Circulatory

  Respiratory

  Digestive

  Genitourinary

  Skin and subcutaneous tissue

  Infectious

  Musculoskeletal

  Neurological

  Others

3.8

5.7

19.2

26.8

11.7

3.0

10.9

1.1

6.0

11.7

8.1

3.0

10.1

19.4

15.5

2.7

20.2

3.9

8.1

7.0

0.20 to 8.6

 − 0.92 to 6.48

3.03 to 15.13

0.16 to 14.52

 − 2.10 to 9.74

 − 2.84 to 3.44

3.09 to 15.51

0.03 to 6.00

 − 2.37 to 6.68

 − 0.34 to 9.79

Length of stay in ED at 1st visit

   < 24 h

  24–48 h

   > 48 h

94.3

3.8

1.9

93.8

5.0

1.2

 − 3.69 to 4.75

 − 2.47 to 4.99

 − 1.76 to 3.28

ED visits within the past 12 months

  0

  1

   >  = 2

66.8

23.8

9.4

73.3

22.9

3.9

 − 1.35 to 14.23

 − 6.35 to 8.12

1.20 to 9.97

Hospitalizations within the past 12 months

  0

  1

   >  = 2

68.7

23.4

7.9

75.2

19.4

5.4

 − 1.20 to 14.08

 − 3.05 to 10.98

 − 1.88 to 6.94

Charlson comorbidity index

  0–1

   >  = 2

59.2

40.8

63.6

36.4

 − 3.92 to 12.63

 − 3.92 to 12.63

Severity based on 1st visit triage

  ESI V (white)

  ESI IV (green)

  ESI III (yellow)

  ESI II (orange)

6.4

15.5

66.8

11.3

3.9

12.8

71.7

11.6

 − 1.41 to 6.52

 − 3.32 to 8.70

 − 3.00 to 12.71

 − 5.21 to 5.84

Patient deposition at 2nd visit

  Discharge home

  Observation unit

  Hospital floor

  Refer

  Critical care unit

50.2

5.3

38.5

2.6

3.4

53.9

5.0

34.9

3.5

2.7

 − 4.83 to 12.15

 − 3.68 to 4.26

 − 4.64 to 11.76

 − 2.25 to 4.19

 − 2.50 to 3.94