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Table 5 Operating characteristics of the Prediction of Acute Coagulopathy of Trauma (PACT) score in the validation cohort

From: Development and validation of a prehospital prediction model for acute traumatic coagulopathy

PACT score ≥100 ≥150 ≥200 ≥250 ≥300
 Patients
  True positive 25 25 18 11 3
  False positive 186 125 67 27 9
  True negative 73 134 192 232 250
  False negative 1 1 8 15 23
 Operating characteristics
  Sensitivity (%) 96.2 96.2 69.2 42.3 11.5
  Specificity (%) 28.2 51.7 74.1 89.6 96.5
  Positive likelihood ratio 1.34 1.99 2.68 4.06 3.32
  Negative likelihood ratio 0.14 0.07 0.42 0.64 0.92
COAST score ≥1 ≥2 ≥3 ≥4 ≥5
 Patients
  True positive 23 15 7 1 0
  False positive 177 89 36 2 0
  True negative 82 170 223 257 259
  False negative 3 11 19 25 26
 Operating characteristics
  Sensitivity (%) 88.5 57.7 26.9 3.9 0
  Specificity (%) 31.7 65.6 86.1 99.3 100
  Positive likelihood ratio 1.29 1.68 1.94 4.98
  Negative likelihood ratio 0.36 0.64 0.85 0.97 1
  1. PACT score Prediction of Acute Coagulopathy of Trauma score, COAST score Coagulopathy of Severe Trauma score