Table 4.
Baseline laboratory and radiographic data in trauma and nontrauma patients with acute lung injury
| Parameter | Trauma (n = 141) | Nontrauma (n = 1307) | p Value |
|---|---|---|---|
| Hematocrit, % | 28.1 (4.7) | 30.0 (5.9) | <.001 |
| Platelets, median (IQR), thousands/μL | 89 (67–130) | 147 (84–233) | <.001 |
| White blood cells, median (IQR), thousands/μL | 11.5 (8.2–15.1) | 13 (8.9–18.5) | .004 |
| Creatinine, median (IQR), mg/dLa | 0.9 (0.8–1.1) | 1.2 (0.8–2.0) | <.001 |
| Bicarbonate, mEq/Lb | 23.6 (4.3) | 21.3 (5.6) | <.001 |
| Bilirubin, median (IQR), mg/dLc | 0.9 (0.6–1.6) | 0.9 (0.5–1.8) | .29 |
| Albumin, g/dLd | 2.0 (0.5) | 2.2 (0.6) | .006 |
| Radiographic lung injury score, median (IQR) | 4 (3–4) | 4 (4–4) | .18 |
| Pneumothorax, no. (%) | 10 (7.1) | 32 (2.4) | .0018 |
| Subcutaneous emphysema, no. (%) | 22 (15.8) | 20 (1.5) | <.001 |
| Pneumomediastinum, no. (%) | 5 (3.6) | 19 (1.5) | .06 |
| Pneumatoceles, no. (%) | 5 (3.5) | 33 (2.5) | .47 |
| Tube thoracostomy, no. (%) | 76 (53.9) | 113 (8.6) | <.001 |
IQR, interquartile range.
a
To convert to μmol/L, multiply by 88.4
b
equivalent to mmol/L
c
to convert to μmol/L, multiply by 17.1
d
to convert to g/L, multiply by 10. All values represent mean (sd) except where indicated. Comparisons made with chi-square test, Student's t-test with unequal variance assumption, or Mann-Whitney U test where appropriate.