Table 4.
Majority rules model selection results and final Prediction of Acute Coagulopathy of Trauma (PACT) score
| Variable | Models containing candidate predictor | In final prediction model? | Regression coefficient | SE | Standardized regression coefficienta | Value | Points per unit |
|---|---|---|---|---|---|---|---|
| First prehospital shock index ≥1 | Forced into model | Yes | 0.933 | 0.249 | 0.324 | Yes/no | 90 |
| Age | 100 % | Yes | 0.0119 | 0.006 | 0.275 | Age, rounded to nearest decade | 1 |
| Mechanism of injury not motor vehicle, motorcycle, or bicycle crash | 100 % | Yes | 0.514 | 0.215 | 0.256 | Yes/no | 50 |
| Number of GCS points below 15 | 98 % | Yes | 0.0705 | 0.032 | 0.171 | 15 – GCS | 7 |
| Prehospital CPR | 100 % | Yes | 1.198 | 0.461 | 0.188 | Yes/no | 120 |
| Prehospital intubation or advanced airway | 74 % | Yes | 0.510 | 0.315 | 0.219 | Yes/no | 50 |
| Prehospital chest decompression | 0 % | No | — | — | — | — | — |
| Time from injury to emergency department | 6 % | No | — | — | — | — | — |
| Constant | N/A | Yes | -4.256 | 0.334 | — | — | — |
aStandardized regression coefficients represent the change in the log-odds of acute traumatic coagulopathy for a 1 standard deviation increase in the value of the predictor. CPR cardiopulmonary resuscitation, GCS Glasgow Coma Score, N/A not applicable