Variables | Univariate analysis | Multivariate analysis | ||||
HR | 95% CI | P values | aHR | 95% CI | P values | |
Age | 1.012 | 1.001 to 1.023 | 0.032* | 1.016 | 1.004 to 1.028 | 0.011* |
Sex, male (reference) | 1.000 | 1.000 | ||||
Female | 1.598 | 1.068 to 2.391 | 0.023* | 1.252 | 0.816 to 1.923 | 0.304 |
SBP at admission | 0.978 | 0.974 to 0.983 | <0.001* | 0.986 | 0.981 to 0.992 | <0.001* |
GCS at admission | 0.82 | 0.785 to 0.856 | <0.001* | 0.887 | 0.838 to 0.938 | <0.001* |
Pelvic AIS | 2.999 | 1.887 to 4.767 | <0.001* | 1.536 | 0.887 to 2.66 | 0.125 |
Head AIS | 1.250 | 1.127 to 1.387 | <0.001* | 1.075 | 0.936 to 1.235 | 0.309 |
Thorax AIS | 1.165 | 1.036 to 1.311 | 0.011* | 0.981 | 0.825 to 1.167 | 0.829 |
Abdomen AIS | 1.126 | 0.997 to 1.270 | 0.055 | 1.153 | 0.986 to 1.348 | 0.075 |
ISS | 1.042 | 1.028 to 1.056 | <0.001* | 1.009 | 0.98 to 1.039 | 0.533 |
Transfer, yes (reference) | 1.000 | 1.000 | ||||
No | 2.241 | 1.486 to 3.380 | <0.001* | 1.485 | 0.93 to 2.47 | 0.097 |
Dataset, NTDB (reference) | 1.000 | 1.000 | ||||
ATDB | 1.321 | 0.868 to 2.010 | 0.194 | 1.562 | 0.992 to 2.46 | 0.054 |
The p value of the time-dependent Cox regression analysis was 0.077, and the −2 log likelihood (-2LL) values were 908.894 for the model.
*Statistically significant (p<0.05).
aHR, adjusted HR; AIS, Abbreviated Injury Scale; ATDB, Ajou Trauma Data Bank; xGCS, Glasgow Coma Scale; xISS, Injury Severity Score; xNTDB, National Trauma Data Bank; xSBP, systolic blood pressure