Table 3.
Comparison of characteristics of subjects with and without usable CT scans.
| Usable CT (n=327) | No usable CT (n=73) |
p | |
|---|---|---|---|
|
| |||
| Age, years | 38 (24,52) | 28 (22,44) | 0.008 |
| Male sex | 235 (72) | 62 (85) | 0.021 |
| Racea | <0.001c | ||
| Caucasian | 176 (54) | 12 (16) | |
| African American | 141 (43) | 60 (82) | |
| Other | 10 (3) | 1 (1) | |
| BMI (kg/m2) | 26.5 (23.1,30.8) | 26.0 (23.5,29.2) | 0.753 |
| Hypertension | 61 (19) | 6 (8) | 0.031 |
| Diabetes mellitus | 20 (6) | 4 (5) | >0.999 |
| Blunt trauma mechanism | 264 (81) | 21 (29) | <0.001 |
| ISS | 22 (19,29) | 20 (18,25) | 0.003 |
| AIS score abdomen | 2 (0,3) | 3 (0,4) | <0.001 |
| APACHE III | 63 (52,76) | 66 (55,83) | 0.104 |
| First serum Cr (mg/dL) | 1.0 (0.9,1.3) | 1.3 (1.1,1.4) | <0.001 |
| Crystalloid, litersb | 3.0 (1.4,5.5) | 5.5 (3.0,7.8) | <0.001 |
| PRBC, unitsb | 0 (0,3) | 4 (0,9) | <0.001 |
| AKI | 66 (20) | 28 (38) | 0.001 |
| Hospital mortality | 27 (8) | 5 (7) | 0.815 |
Data are shown as n (%) for categorical variables, mean ± standard deviation for normal continuous variables, and median (interquartile range) for non-normal continuous variables. Definition of abbreviations: CT=computed tomography; BMI= body-mass index; ISS= Injury Severity Score; AIS= Abbreviated Injury Scale; APACHE III= Acute Physiology And Chronic Health Evaluation III; PRBC= packed red blood cells; AKI=acute kidney injury.
a
Investigator-identified; “Other” are Asian (n=10) and American Indian (n=1).
b
Total amount during resuscitation prior to ICU admission.
c
Fisher’s exact test comparing 3 categories.