| 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 |