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Schonfeld's criteria [9] (total score > 5 required for diagnosis).
| Criteria | Point |
|---|---|
| Petechiea | 5 |
| Chest X-ray change (diffuse alveolar change) | 4 |
| Hypoxemia (PaO2 < 9.3 kPa) | 3 |
| Fever (temperature > 38°C) | 1 |
| Tachycardia (HR > 120 bpm) | 1 |
| Tachypnea (>30/min) | 1 |
| Confusion | 1 |
