Table 7 Model 4: Association of clinical, demographic and process factors with Prolonged length of stay

Demographic

Age group (years)

1 and Under

1.00

-

-

1.00

-

-

ref

-

-

2 to 5

0.71

0.59, 0.86

0.001

0.62

0.49, 0.79

<0.001

−0.34

−0.56, −0.11

0.003

6 to 10

0.72

0.54, 0.95

0.019

0.71

0.51, 0.99

0.045

−0.3

−0.61, 0.008

0.056

11 to 16

0.88

0.64, 1.20

0.421

0.58

0.39, 0.86

0.007

−0.31

−0.65, 0.03

0.077

Distance (overall quartiles)*

1st (closest)

1.00

-

-

1.00

2nd

0.70

0.85, 1.31

0.002

0.77

0.58, 1.01

0.059

−0.23

−0.50, 0.03

0.086

3rd

0.82

0.56, 0.88

0.094

0.78

0.59, 1.02

0.073

−0.31

−0.57, −0.05

0.021

4th (furthest away)

0.95

0.75, 1.21

0.707

1.03

0.77, 1.37

0.844

−0.15

−0.43, 0.12

0.271

Clinical

Specialty

Medical

1.00

-

-

1.00

-

-

ref

-

-

Surgical

0.68

0.48, 0.96

0.030

0.75

0.48, 1.17

0.206

−0.32

−0.68, 0.05

0.088

Diagnosis

allergy

1.00

-

-

1.00

-

-

ref

-

-

cardiac

1.21

0.29, 5.10

0.796

0.90

0.18, 4.47

0.902

0.84

−0.86, 2.53

0.332

endocrine

1.25

0.34, 4.70

0.736

1.30

0.29, 5.73

0.729

0.79

−0.77, 2.35

0.321

gastro

0.84

0.26, 2.71

0.765

0.55

0.14, 2.10

0.382

0.02

−1.35, 1.40

0.972

haemoncology

1.81

0.54, 6.09

0.341

1.48

0.37, 5.87

0.576

0.8

−0.62, 2.23

0.270

infection

1.16

0.36, 3.71

0.807

0.61

0.16, 2.32

0.471

0.23

−1.14, 1.60

0.742

MSK

0.69

0.18, 2.61

0.581

0.38

0.08, 1.93

0.245

0.19

−1.35, 1.73

0.809

neurology

0.75

0.23, 2.46

0.631

0.61

0.16, 2.39

0.481

0.23

−1.16, 1.63

0.742

other

0.92

0.26, 3.26

0.891

0.45

0.10, 1.98

0.292

−0.02

−1.51, 1.46

0.976

psychosocial

0.41

0.10, 1.62

0.202

0.27

0.05, 1.60

0.150

−0.24

−1.79, 1.32

0.767

respiratory

1.09

0.34, 3.50

0.885

0.60

0.16, 2.27

0.450

0.27

−1.10, 1.64

0.700

surgical GIT

4.76

1.21, 18.70

0.026

1.88

0.43, 8.29

0.405

1.09

−0.48, 2.66

0.174

trauma

0.46

0.14, 1.52

0.205

0.28

0.07, 1.13

0.073

0.14

−1.25, 1.53

0.845

urogenital

1.32

0.39, 4.44

0.652

0.72

0.18, 2.89

0.647

0.26

−1.16, 1.69

0.720

Maxfax/Dental/ENT

0.97

0.27, 3.53

0.960

0.38

0.08, 1.75

0.212

0.37

−1.10, 1.84

0.621

congenital

1.20

0.14, 10.06

0.863

1.63

0.18, 14.64

0.662

0.18

−2.12, 2.48

0.876

Dermatology

1.55

0.44, 0.96

0.499

0.80

0.19, 3.42

0.769

0.24

−1.26, 1.73

0.756

Admissions per year

1

1.00

-

-

1.00

-

-

2

1.01

0.81, 1.25

0.950

1.18

0.91, 1.53

0.217

0.25

0.002, 0.50

0.048

3

1.50

1.07, 2.11

0.020

1.32

0.89, 1.96

0.166

0.24

−0.16, 0.63

0.237

4 or more

1.21

0.89, 1.64

0.228

1.90

1.36, 2.66

<0.001

0.24

−0.12, 0.59

0.194

Process

Time of admission

9.00 to 16.59

1.00

-

-

1.00

-

-

ref

-

-

17.00 to 21.59

1.19

0.97, 1.46

0.087

1.32

1.04, 1.68

0.023

0.18

−0.06, 0.41

0.151

22.00 to 08.59

0.61

0.51, 0.75

<0.001

0.81

0.64, 1.03

0.084

−0.46

−0.68, −0.24

<0.001

Day of admission

weekday

1.00

-

-

1.00

-

-

ref

-

-

weekend

0.76

0.60, 0.97

0.027

0.72

0.53, 0.97

0.033

−0.17

−0.44, 0.10

0.209

Source of admission

elective

1.00

-

-

1.00

-

-

ref

-

-

emergency via ED

4.59

2.80, 7.51

<0.001

2.14

1.97, 3.81

0.010

0.53

0.10, 0.97

0.017

emergency via other

2.34

1.38, 3.97

0.002

1.72

0.93, 3.18

0.084

0.19

−0.30, 0.67

0.452

other

8.68

4.16, 18.14

<0.001

6.96

3.18, 15.23

<0.001

3.01

2.24, 3.79

<0.001

Season of admission

spring

1.00

-

-

1.00

-

-

ref

-

-

summer

0.83

0.66, 10.4

0.113

0.92

0.70, 1.21

0.541

−0.36

−0.62, −0.11

0.006

autumn

1.06

0.85, 1.32

0.607

1.22

0.94, 1.60

0.134

−0.02

−0.27, 0.24

0.887

winter

0.87

0.69, 1.09

0.216

0.97

0.74, 1.28

0.836

−0.18

−0.44, 0.08

0.167