Table 4. Risk Factors for Mortality, Increased Length of Stay, and Blood Loss During Surgery.
| Characteristic | Mortality, aOR (95% CI) | P value | Increase in log of LOS (95% CI), d | P value | EBL, aOR (95% CI) per 1-unit increase in EBL category | P value | Unplanned return to the operating room, aOR (95% CI) | P value |
|---|---|---|---|---|---|---|---|---|
| Hemorrhagic shock | 3.04 (1.44-6.45) | .004 | 1.03 (0.97-1.09) | .30 | 15.51 (10.46-23.00) | <.001 | 1.27 (0.68-2.38) | .46 |
| Surgeon experience, y | ||||||||
| <6 | 1 [Reference] | NA | 1 [Reference] | NA | 1 [Reference] | NA | 1 [Reference] | NA |
| 6-10 | 1.08 (0.59-1.98) | .80 | 1.02 (0.98-1.08) | .21 | 1.04 (0.65-1.68) | .84 | 0.66 (0.40-1.09) | .10 |
| 11-30 | 1.10 (0.48-2.51) | .82 | 0.98 (0.91-1.05) | .82 | 0.85 (0.48-1.52) | .58 | 0.34 (0.13-0.90) | .03 |
| >30 | 0.88 (0.23-3.34) | .85 | 0.65 (0.58-0.72) | <.001 | 1.61 (0.78-3.35) | .20 | 1.11 (0.45-2.75) | .81 |
| Emergency Surgery Score | 1.49 (1.35-1.64) | <.001 | 1.12 (1.11-1.13) | <.001 | NA | NA | 1.12 (1.03-1.21) | .01 |
| Trauma patient | 0.92 (0.46-1.86) | .82 | 1.19 (1.13-1.25) | <.001 | NA | NA | 0.97 (0.56-1.68) | .92 |
| Case complexity | ||||||||
| Level 1 | 1 [Reference] | NA | 1 [Reference] | NA | 1 [Reference] | NA | 1 [Reference] | NA |
| Level 2 | 2.86 (0.36-22.60) | .32 | 1.22 (1.12-1.34) | <.001 | 1.54 (0.91-2.62) | .11 | 1.24 (0.45-3.41) | .68 |
| Level 3 | 3.60 (0.46-28.43) | .22 | 1.35 (1.23-1.47) | <.001 | 3.48 (2.04-5.92) | <.001 | 1.13 (0.41-3.14) | .82 |
| Level 4 | 4.13 (0.45-37.77) | .21 | 1.68 (1.50-1.88) | <.001 | 8.24 (4.03-16.85) | <.001 | 6.98 (2.28-21.36) | <.001 |
Abbreviations: aOR, adjusted odds ratio; EBL, estimated blood loss; LOS, length of stay; NA, not applicable.