Table 2.
Characteristics of study population, with comparison of actual to predicted results from the final model with time-varying parameters for the categories shown. LOS=Mean actual LOS, LOSpred=Mean LOS predicted by the model, SURV=Actual percentage surviving, SURVpred=Probability of survival predicted by the model
| CASES | LOS | LOSpred | SURV | SURVpred | |
|---|---|---|---|---|---|
| Age < 55 | 1,830 (69%) | 6.73 | 7.09 | .966 | .968 |
| 55 ≤ Age ≤ 70 | 355 (13%) | 8.63 | 7.93 | .961 | .958 |
| Age > 70 | 461 (17%) | 8.90 | 8.96 | .889 | .902 |
| Penetrating | 143 (5%) | 4.76 | 5.95 | .902 | .911 |
| Burns | 92 (3%) | 15.47 | 15.85 | .978 | .975 |
| Vehicle Crashes | 944 (36%) | 9.69 | 10.02 | .918 | .931 |
| HeadAIS > 2 | 609 (23%) | 10.76 | 11.37 | .865 | .876 |
| FaceAIS > 2 | 19 (1%) | 19.21 | 16.56 | 1.000 | .992 |
| ChestAIS > 2 | 347 (13%) | 12.90 | 13.92 | .841 | .861 |
| AbdomenAIS > 2 | 131 (5%) | 12.77 | 14.84 | .870 | .874 |
| ExtremityAIS > 2 | 557 (21%) | 10.54 | 9.88 | .953 | .955 |
| GeneralAIS > 2 | 15 (1%) | 24.40 | 28.98 | .933 | .935 |
| Best GCS <13 | 250 (9%) | 14.26 | 14.77 | .664 | .707 |
| Worst SBP <90 | 86 (3%) | 10.62 | 13.72 | .709 | .812 |
| All Cases | 2,646 | 7.36 | 7.53 | .952 | .955 |