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 |