Table 2.
Univariate analysis for patients with post-operative complications
| Variable | No complicationa | Complicationa | Significance |
|---|---|---|---|
| n = 266 (80.1 %) | n = 66 (19.9 %) | ||
| Age (years) | 39.1 ± 16.2 | 40.3 ± 17.3 | 0.597 |
| African-American race | 53 (19.7 %) | 15 (22.7 %) | 0.505 |
| Female gender | 82 (31.1 %) | 13 (19.7 %) | 0.070 |
| ISS | 24.5 ± 9.3 | 36.4 ± 15.0 | <0.0005† |
| ASA score | 2.7 ± 0.8 | 3.3 ± 0.9 | 0.020† |
| BMI | 29.5 ± 7.9 | 30.3 ± 7.7 | 0.483 |
| OSH transfer | 113 (42.5 %) | 30 (45.5 %) | 0.679 |
| Time to EAC resuscitation (hours) | 6.29 ± 8.24 | 9.07 ± 10.58 | 0.022† |
| Number of fracturesb | 1.1 ± 0.4 | 1.2 ± 0.4 | 0.331 |
| Presence of a femur fracturec | 138 (51.9 %) | 21 (31.8 %) | 0.005† |
| Presence of an acetabulum fracture | 46 (17.3 %) | 10 (15.2 %) | 0.854 |
| Presence of a pelvic ring fracture | 49 (18.4 %) | 21 (31.8 %) | 0.027† |
| Presence of a cervical spine fracture | 3 (1.1 %) | 3 (4.5 %) | 0.096 |
| Presence of a thoracolumbar spine fracture | 52 (19.5 %) | 21 (31.8 %) | 0.045† |
ISS Injury Severity Score, ASA American Society of Anesthesiologists’ Classification, BMI body mass index, OSH outside hospital transfer
†p < 0.05
aThe values are given as the mean and the standard deviation for continuous variables and as the number of patients in the respective outcome group, with the percentage in parentheses for categorical variables
bCompared with the chi-square test
cTwelve patients sustained bilateral femur fractures. Since the univariate analysis was designed to assess the presence or absence of a femur fracture, the number of individuals with femur fractures (159) is less than and discordant with the number of femur fractures in total (171)