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Table 2 Variables influencing ED visits and hospital admissions analyzed through logistic regression with the GEE model having a difference-in-difference design

From: Impact of family physician integrated care program on decreasing utilization of emergency department visit and hospital admission: a population-based retrospective cohort study

Variables

ED visits

Hospital admissions

OR

95% C.I.

P-value

OR

95% C.I.

P-value

FPIC or control

  control (ref)

 FPIC

1.01

0.97-

1.06

0.526

0.99

0.93-

1.05

0.625

Joining time

 Before FPIC (ref)

  A1Y

1.01

0.97-

1.05

0.555

1.02

0.96-

1.08

0.467

  A2Y

1.01

0.97-

1.05

0.767

0.99

0.93-

1.05

0.623

  A3Y

1.00

0.96-

1.04

0.988

1.00

0.94-

1.06

0.895

  A4Y

1.05

1.00-

1.09

0.029

0.99

0.93-

1.05

0.671

  A5Y

1.06

1.02-

1.11

0.003

0.96

0.90-

1.02

0.156

  A6Y

1.08

1.03-

1.12

< 0.001

1.03

0.97-

1.09

0.295

  A7Y

1.03

0.99-

1.08

0.121

1.03

0.97-

1.09

0.312

Policy effect

        

 FPIC*A1Y

1.03

0.97-

1.08

0.359

1.11

1.03-

1.20

0.007

 FPIC*A2Y

0.97

0.92-

1.03

0.348

1.00

0.92-

1.08

0.920

 FPIC*A3Y

1.01

0.95-

1.07

0.762

1.02

0.95-

1.11

0.559

 FPIC*A4Y

0.99

0.93-

1.04

0.664

1.01

0.93-

1.09

0.861

 FPIC*A5Y

1.03

0.97-

1.09

0.345

0.96

0.88-

1.04

0.273

 FPIC*A6Y

1.01

0.96-

1.07

0.640

0.92

0.85-

1.00

0.050

 FPIC*A7Y

1.02

0.96-

1.08

0.551

0.92

0.85-

1.00

0.045

Gender

 Female (ref)

        

 Male

1.15

1.12-

1.17

< 0.001

1.01

0.98-

1.03

0.708

Age

  < 45 (ref)

  45–54

0.75

0.73-

0.77

< 0.001

0.59

0.57-

0.61

< 0.001

  55–64

0.68

0.66-

0.70

< 0.001

0.57

0.55-

0.59

< 0.001

  65–74

0.72

0.70-

0.75

< 0.001

0.68

0.65-

0.71

< 0.001

   ≥ 75

0.99

0.95-

1.03

0.728

0.87

0.83-

0.91

< 0.001

Monthly salary

  ≤ 17,280 (ref)

  17,281-22,800

0.94

0.91-

0.98

0.001

1.03

0.98-

1.08

0.264

  22,801-28,800

0.94

0.91-

0.98

0.003

0.99

0.94-

1.04

0.681

  28,801-36,300

0.89

0.85-

0.92

< 0.001

0.97

0.92-

1.03

0.294

  36,301-45,800

0.84

0.80-

0.87

< 0.001

0.94

0.89-

1.00

0.047

  45,801-57,800

0.75

0.71-

0.79

< 0.001

0.84

0.78-

0.90

< 0.001

   ≥ 57,801

0.74

0.70-

0.78

< 0.001

0.76

0.71-

0.82

< 0.001

Urbanization

 1(ref)

  2

1.05

1.02-

1.07

< 0.001

1.09

1.05-

1.12

< 0.001

  3

1.02

0.99-

1.05

0.114

1.16

1.11-

1.20

< 0.001

  4

1.12

1.08-

1.15

< 0.001

1.27

1.22-

1.32

< 0.001

  5

1.05

0.97-

1.13

0.220

1.18

1.08-

1.29

< 0.001

  6

1.18

1.12-

1.25

< 0.001

1.45

1.36-

1.54

< 0.001

  7

1.04

0.98-

1.11

0.174

1.29

1.19-

1.39

< 0.001

CCI

 0 (ref)

  1

1.11

1.09-

1.14

< 0.001

1.27

1.23-

1.31

< 0.001

  2

1.24

1.20-

1.28

< 0.001

1.88

1.80-

1.96

< 0.001

   ≥ 3

1.83

1.75-

1.92

< 0.001

3.96

3.76-

4.17

< 0.001

Frequency of annual outpatient visits

 0 ~ 5 (ref)

  6 ~ 10

1.35

1.32-

1.39

< 0.001

2.34

2.20-

2.49

< 0.001

  11 ~ 15

1.68

1.63-

1.73

< 0.001

4.01

3.77-

4.26

< 0.001

  16 ~ 20

2.03

1.97-

2.10

< 0.001

6.02

5.66-

6.41

< 0.001

  20 ~ 25

2.39

2.31-

2.47

< 0.001

8.03

7.54-

8.56

< 0.001

   ≥ 25

3.25

3.15-

3.35

< 0.001

10.85

10.22-

11.53

< 0.001

Level of medical institutions

 Medical center(ref)

  Regional hospital

1.13

1.09-

1.17

< 0.001

0.99

0.95-

1.03

0.738

  Local hospital

0.91

0.88-

0.94

< 0.001

0.71

0.67-

0.74

< 0.001

  Clinic

0.43

0.42-

0.45

< 0.001

0.23

0.22-

0.23

< 0.001

Ownership of medical institutions

 Public hospital (ref)

        

 Private hospital

1.02

0.99-

1.05

0.313

1.10

1.06-

1.14

< 0.001

  1. AnY = nth year after joining FPIC
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BMC Health Services Research

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