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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