Table 4.
Multivariable analysis of factors associated with the risk of infection
| Risk Factor | Multivariable Odds Ratio (95 per cent CI) | P value |
|---|---|---|
| Blast injury | 2.6 (1.4 – 4.8) | 0.001 |
| Any traumatic amputation | 1.5 (0.9 – 2.4) | 0.124 |
| Any fracture | 1.6 (0.9 – 3.0) | 0.094 |
| Admission to the ICUa | ||
| LRMC only | 1.4 (0.7 – 2.7) | 0.320 |
| U.S. MTF ± LRMC | 3.3 (1.8 – 6.2) | <0.001 |
| PRBC transfusions within 24 hours of injuryb | ||
| ≥ 10 units | 2.4 (1.5 – 4.0) | <0.001 |
| Shock indexc | ||
| 0.57–0.69 | 0.5 (0.3 – 1.1) | 0.079 |
| 0.69–0.82 | – | – |
| >0.82 | – | – |
| Tranexamic acid use | 1.3 (0.8 – 1.9) | 0.243 |
CI – confidence interval; ICU – intensive care unit; LRMC – Landstuhl Regional Medical Center; MTFs – military treatment facilities; PRBC – packed red blood cells plus whole blood
a
The reference value was non-ICU.
b
The reference was transfusion of <10 units.
c
The reference value was shock index of <0.57.