TABLE IV.
Multivariate Regression Model of Likelihood of Infection
| All Infections |
Major Infections |
|||
| Unadjusted* | Adjusted† | Unadjusted* | Adjusted† | |
| Patients admitted directly to trauma center | ||||
| ≤2 hr | Reference | Reference | Reference | Reference |
| >2 hr | 4.3‡ | 5.4‡ (2.5 to 11.5) | 2.7‡ | 3.1‡ (1.4 to 7.0) |
| Patients transferred to trauma center | ||||
| 1 to 3 hr | Reference | Reference | Reference | Reference |
| 4 to 10 hr | 1.1 | 1.5 (0.6 to 3.6) | 0.8 | 0.9 (0.3 to 3.1) |
| 11 to 24 hr | 1.6§ | 1.9§ (0.9 to 4.3) | 2.2§ | 2.6‡ (1.1 to 6.2) |
| Bone loss | ||||
| ≤2 cm | Reference | Reference | Reference | Reference |
| >2 cm | 2.2§ | 1.7§ (0.8 to 3.7) | 3.3‡ | 3.0‡ (1.3 to 6.5) |
| Tibial fracture | ||||
| Grade IIIA/B | Reference | Reference | Reference | Reference |
| Grade IIIC | 2.8‡ | 1.9‡ (1.0 to 6.3) | 1.4 | 1.5 (0.4 to 4.7) |
| Compartment syndrome | ||||
| Absent | Reference | Reference | Reference | Reference |
| Present | 2.0§ | 1.7§ (1.1 to 7.3) | 1.7 | 1.5 (0.4 to 5.3) |
| Fixation device | ||||
| Nail | Reference | Reference | Reference | Reference |
| External fixator/plate | 2.3§ | 1.6§ (1.1 to 3.0) | 2.2§ | 2.0§ (0.8 to 4.9) |
| Education | ||||
| No college | Reference | Reference | Reference | Reference |
| Some college | 0.6§ | 0.7 (0.3 to 1.2) | 0.7 | 0.8 (0.4 to 1.8) |
| Smoking | ||||
| Nonsmoker | Reference | Reference | Reference | Reference |
| Smoker | 1.7§ | 1.7§ (0.8 to 3.3) | 1.7 | 1.5 (0.6 to 3.4) |
*
The values are given as odds ratios.
†
The values are given as odds ratios, with 95% confidence intervals in parentheses.
‡
p < 0.01.
§
p < 0.1.