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Table 4 Multinomial regression model – relative risk of exposure variables comparing Indirect and No transfer to SCIU, with reference of direct admission to SCIU

From: A geospatial examination of specialist care accessibility and impact on health outcomes for patients with acute traumatic spinal cord injury in New South Wales, Australia: a population record linkage study

Triage Patterns

RRRa

Std. Err

P-value

95% Confidence Interval

Direct SCIU

(as base outcome for No SCIU)

No SCIU

 age (years)

1.02

0.01

0.034

1.002–1.039

 SCIU > 60 min

0.281

0.119

0.003

0.123–0.646

 Female sex

0.959

0.44

0.928

0.391–2.355

Injury Mechanism

 Other (reference)

  Falls

0.629

0.343

0.388

0.21–1.83

  Transport

0.559

0.343

0.344

0.17–1.86

  Self-harm /Assault

11.449

16.289

0.087

0.70–186.13

Injury level

 Cervical (reference)

  Thoracic

1.838

0.983

0.255

0.64–5.24

  Lumbar

3.917

5.142

0.298

0.29–51.33

Extent of spinal cord Injury

 Not coded (reference)

  Complete

0.061

0.044

< 0.001

0.015–0.25

  Incomplete

0.288

0.159

0.024

0.09–0.85

  Conus/cauda-equina

0.108

0.136

0.077

0.01–1.27

Arrival Mode

 Missing (reference)

  Road Ambulance

8.139

6.273

0.007

1.79–36.86

  Air ambulance

0.61

0.606

0.619

0.09–4.27

ICISS Score

  < 0.7 (base)

  0.7 to < 0.83

0.696

0.471

0.592

0.18–2.62

  0.83 to < 0.89

1.558

1.154

0.55

0.36–6.66

  0.89 to < 0.95

2.275

1.929

0.332

0.43–11.99

  0.95 to 1.00

10.125

11.045

0.034

1.19–85.88

Multiple trauma

 0 (base)

  One additional injury

0.35

0.158

0.02

0.15–0.85

  Two or more

0.942

0.503

0.911

0.33–2.68

Direct SCIU

(as base outcome for Indirect SCIU)

Indirect SCIU

 Age (years)

0.998

0.01

0.84

0.98–1.02

 SCIU > 60 min

0.511

0.22

0.11

0.22–1.17

 Female sex

0.96

0.45

0.93

0.38–2.43

Injury Mechanism

 Other (reference)

  Falls

0.51

0.28

0.22

0.17–1.49

  Transport

0.56

0.34

0.34

0.17–1.84

  Self-harm/Assault

9.02

12.77

0.12

0.56–144.74

Injury level

 Cervical (reference)

  Thoracic

0.61

0.32

0.35

0.22–1.69

  Lumbar

0.23

0.27

0.22

0.02–2.48

Extent of Injury

 Missing (reference)

  Complete

1.774

1.21

0.40

0.46–6.77

  Incomplete

1.625

1.03

0.44

0.47–5.62

  Conus/cauda-equina

0.502

0.59

0.56

0.05–5.01

Arrival Mode

 Other (reference)

  Road ambulance

20.148

18.13

0.001

3.45–117.52

  Air ambulance

1.768

1.84

0.58

0.23–13.55

ICISS Score

  < 0.7 (reference)

  0.7 to < 0.83

2.04

1.52

0.34

0.47–8.79

  0.83 to < 0.89

9.98

8.14

0.005

2.02–49.38

  0.89 to < 0.95

18.69

17.09

0.001

3.11–112.25

  0.95 to 1.00

33.87

39.64

< 0.001

24.14–58.76

Multiple trauma

 0 (reference)

  One additional injury

0.65

0.29

0.35

0.26–1.59

  Two or more

5.18

2.77

0.002

1.82–14.75

  1. aRelative Risk Ratios
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BMC Health Services Research

ISSN: 1472-6963

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