Scores | Parameters |
---|
PaFI (PaO2/FiO2) | SOFA | DD (ng/mL) |
---|
+ 0 point | > 400 | ≤ 3 | – |
+ 1 point | 300–400 | – | – |
+ 2 points | 200–299 | 3–5 | > 10,000 |
+ 3 points | < 200 | > 5 | – |
- PaFI = partial pressure of arterial blood oxygen/fraction of inspired oxygen ratio; PaO2 = partial pressure of arterial blood oxygen; FiO2 = fraction of inspired oxygen; SOFA = sequential organ failure assessment; DD = D-dimer
- No point was added if patients had a PaFI > 400 or SOFA ≤ 3. One point was added if they presented a PaFI between 300 and 400. If the PaFI was between 200 and 299, SOFA values were between 3 and 5 or D-dimer was > 10,000, 2 points were assigned for each. The absolute value of severity for each patient was obtained by adding the score for each parameter present. The score range was between 0 and 7 points: mild disease included patients with a score between 0 and 3, moderate disease was considered with a score of 4 points, and severe disease included patients with a score superior to 4 points