Table 4.
Results of Multivariate Logistic Regression Analyses of Factors Associated with In-hospital mortality and Transfer for Unknown ISS and ISS <15
| Mortality (n=15008)a
AUC=0.78 |
Transfer (n=11255) AUC = 0.88 |
|||
|---|---|---|---|---|
| Variable | OR (95% CI) | P-value* | OR (95% CI) | P-value* |
| Age in Years | 0.0043 | <0.0001 | ||
| <1 | 2.24 (0.92, 5.43) | 0.0760 | 1.62 (1.17, 2.24) | 0.0039 |
| 1-3 | 3.08 (1.59, 5.99) | 0.0010 | 1.90 (1.55, 2.34) | <0.0001 |
| 4-6 | 1.56 (0.76, 3.19) | 0.2297 | 1.72 (1.40, 2.11) | <0.0001 |
| 7-9 | 0.76 (0.28, 2.02) | 0.5813 | 1.21 (1.00, 1.46) | 0.0575 |
| 10-15 | REF | REF | ||
| Admitting Hospital Trauma Level |
0.0001 | <0.0001 | ||
| 1 | REF | - | ||
| 2 | 0.86 (0.43, 1.74) | 0.6828 | REF | |
| 3 | 0.62 (0.22, 1.71) | 0.3595 | 24.03 (15.33, 37.66) | <0.0001 |
| NTC | 0.16 (0.07, 0.38) | <0.0001 | 59.73 (42.64, 83.65) | <0.0001 |
| Motor Vehicle Collision | 0.2517 | 0.0007 | ||
| No | REF | REF | ||
| Yes | 1.43 (0.78, 2.60) | 0.2517 | 1.32 (1.12, 1.54) | 0.0007 |
| Miles to the closest Trauma Centerb |
0.5030 | 0.0105 | ||
| 0-9.9 | 1.42 (0.54, 3.77) | 0.4838 | 0.62 (0.43, 0. 90) | 0.0124 |
| 10-29.9 | 0.86 (0.33, 2.28) | 0.6789 | 0.74 (0.58, 0.93) | 0.0109 |
| 30+ | REF | REF | ||
| Type of Trauma | 0.0312 | 0.9923 | ||
| Blunt | REF | REF | ||
| Penetrating | 2.09 (1.07, 4.08) | 0.0312 | 1.00 (0.77, 1.29) | 0.9923 |
| Insurance | 0.0231 | 0.1903 | ||
| Commercial | REF | REF | ||
| Government | 2.61 (1.35, 5.05) | 0.0044 | 0.97 (0.82, 1.15) | 0.7381 |
| Self-Pay | 3.08 (1.25, 7.64) | 0.0154 | 1.23 (0.96, 1.57) | 0.1028 |
| Unknown | 2.02 (0.88, 4.65) | 0.1001 | 1.32 (0.86, 2.05) | 0.2066 |
| Time from injury to admission |
0.0827 | <0.0001 | ||
| <24 hrs | REF | REF | ||
| 24+ hrs | 0.34 (0.10, 1.15) | 0.0827 | 0.55 (0.43, 0.72) | <0.0001 |
*
Omnibus p-values are in shaded rows
a
records with missing distance to the closest TC, missing time from injury to admission were removed; records with missing transfer information were removed from the analysis of Transfer
b
Two categories of distance to TC (“0” and “0.1-9.9”) were merged together into “0-9.9” to avoid singular design matrix in the regression model fit. The effect of TC level 1 is accounted for by the type of admitting hospital.