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Table 4 New Injury Severity Score (NISS) + Polytrauma + Revised Trauma Score (RTS)

From: Combining the new injury severity score with an anatomical polytrauma injury variable predicts mortality better than the new injury severity score and the injury severity score: a retrospective cohort study

Variable

Category

Coefficient

OR (95 % CI)

P-value

New Injury Severity Score (NISS)

 

0.08

1.08 (1.07, 1.09)

<0.001

Polytrauma (reference no polytrauma)

 

0.68

1.98 (1.53, 2.54)

<0.001

Revised Trauma Score (RTS)

 

−0.80

0.45 (0.42, 0.49)

<0.001

Age

18–44

 

1 (reference)

 
 

45–54

0.25

1.29 (0.82–2.01)

0.272

 

55–64

0.94

2.56 (1.77–3.71)

<0.001

 

65–69

1.36

3.90 (2.46–6.18)

<0.001

 

70–74

1.40

4.04 (2.57–6.34)

<0.001

 

75–84

2.07

7.95 (5.58–11.32)

<0.001

 

85 and above

2.58

13.26 (9.13–19.25)

<0.001

Gender (reference female)

 

0.15

1.17 (0.94,1.45)

0.167

Charlson Comorbidity index

0

 

1 (reference)

 
 

1

0.04

1.04 (0.80–1.35)

0.786

 

2

0.62

1.86 (1.33–2.60)

<0.001

 

3

1.20

3.31 (2.03–5.38)

<0.001

 

4 or more

1.24

3.47 (1.85–6.51)

<0.001

Constant

 

−0.72

0.49 (0.25–0.95)

0.034

  1. Abbreviations: CI 95 % confidence interval, OR odds ratio, NISS New Injury Severity Score, RTS Revised Trauma Score