Table 5.
Results of Multivariate Logistic Regression Analyses of Factors Associated with In-hospital mortality and Transfer for 16 ≤ ISS < 75*
| Mortality (n=1732)a
AUC = 0.71 |
Transfer (n=708)a
AUC = 0.94 |
|||
|---|---|---|---|---|
| Variable | OR (95% CI) | P-value* | OR (95% CI) | P-value* |
| Age in Years | <0.0001 | 0.9490 | ||
| <1 | 2.53 (1.30, 4.94) | 0.0067 | 0.75 (0.34, 1.67) | 0.4852 |
| 1-3 | 3.81 (2.26, 6.40) | <0.0001 | 0.81 (0.40, 1.64) | 0.5665 |
| 4-6 | 1.46 (0.74, 2.87) | 0.2804 | 0.94 (0.42, 2.09) | 0.8789 |
| 7-9 | 0.92 (0.48, 1.78) | 0.8078 | 0.77 (0.27, 2.17) | 0.6190 |
| 10-15 | REF | REF | ||
| Admitting Hospital Trauma Level |
0.0108 | <0.0001 | ||
| 1 | REF | - | ||
| 2 | 1.52 (1.00, 2.32) | 0.0538 | REF | |
| 3 | 1.72 (0.51, 5.82) | 0.3870 | 50.67 (17.92, 143.28) | <0.0001 |
| NTC | 0.26 (0.08, 0.90) | 0.0343 | 288.72 (108.75, 766.51) |
<0.0001 |
| Motor Vehicle Collision | <0.0001 | 0.0003 | ||
| No | REF | REF | ||
| Yes | 3.07 (1.82, 5.18) | <0.0001 | 0.32 (0.18, 0.59) | 0.0003 |
| Miles to the closest Trauma Centerb |
0.0727 | 0.5039 | ||
| 0-9.9 | 1.52 (0.50, 4.65) | 0.4657 | 0.88 (0.28, 2.74) | 0.8291 |
| 10-29.9 | 0.36 (0.10, 1.34) | 0.1316 | 0.64 (0.27, 1.55) | 0.3277 |
| 30+ | REF | REF | ||
| Type of Trauma | <0.0001 | 0.0005 | ||
| Blunt | REF | REF | ||
| Penetrating | 10.49 (4.87, 22.59) | <0.0001 | 0.10 (0.03, 0.37) | 0.0005 |
| Insurance | 0.0003 | 0.8663 | ||
| Commercial | REF | REF | ||
| Government | 0.81 (0.52, 1.25) | 0.3372 | 1.01 (0.56, 1.80) | 0.9841 |
| Self-Pay | 2.09 (1.21, 3.58) | 0.0080 | 1.44 (0.57, 3.61) | 0.4439 |
| Unknown | 1.68 (0.88, 3.21) | 0.1151 | 0.99 (0.26, 3.81) | 0.9865 |
| Time from injury to admission |
0.2984 | 0.0326 | ||
| <24 hrs | REF | REF | ||
| 24+ hrs | 0.64 (0.28, 1.47) | 0.2984 | 0.40 (0.17, 0.92) | 0.0326 |
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
*
Omnibus p-values are in shaded rows
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.