Table 2.
Arterial blood gas and biomarkers in patients with hyperoxemia and non-hyperoxemia
| Hyperoxemia | Non-hyperoxemia | P value | |||
|---|---|---|---|---|---|
| Arterial blood gas on arrival, median (IQR) | |||||
| PaO2, mmHg | 355 | (304–413) | 112 | (78–192) | < 0.001 |
| FiO2 | 1.0 | (0.8–1.0) | 0.6 | (0.3–1.0) | < 0.001 |
| P/F ratio, mmHg | 389 | (308–481) | 251 | (139–391) | < 0.001 |
| PaCO2, mmHg | 40 | (36–44) | 38 | (34–44) | 0.256 |
| Arterial blood gas at 3 h, median (IQR) | |||||
| PaO2, mmHg | 205 | (127–311) | 104 | (82–163) | < 0.001 |
| FiO2 | 0.5 | (0.4–0.6) | 0.4 | (0.2–0.5) | < 0.001 |
| P/F ratio, mmHg | 424 | (321–527) | 344 | (229–446) | < 0.001 |
| PaCO2, mmHg | 40 | (37–45) | 40 | (35–45) | 0.517 |
| Biomarkers on arrival, median (IQR) | |||||
| sRAGE, pg/mL | 1446 | (596–2786) | 1046 | (724–2216) | 0.530 |
| HMGB-1, ng/mL | 20.6 | (11.0–46.6) | 13.7 | (8.7–22.1) | 0.023 |
| SPD, ng/mL | 32.0 | (17.2–47.6) | 30.5 | (17.4–47.6) | 0.952 |
| CCSP, ng/mL | 13.6 | (8.5–22.0) | 9.2 | (6.5–17.5) | 0.086 |
| IL-8, pg/mL | 18.2 | (8.0–29.4) | 11.4 | (8.0–29.8) | 0.230 |
P/F PaO2/FiO2, IQR interquartile range, sRAGE soluble receptor for advanced glycation end-products, HMGB-1 high mobility group box-1, SPD surfactant protein D, CCSP Clara cell secretory protein, IL interleukin