Table A4.
4C mortality score for COVID-19 [24]. All points are added up.
| Parameter | 4C Points | |
|---|---|---|
| Age (years) | <50 | 0 |
| 50–59 | 2 | |
| 60–69 | 4 | |
| 70–79 | 6 | |
| ≥80 | 7 | |
| Sex at birth | Female | 0 |
| Male | 1 | |
| Number of comorbidities a | 0 | 0 |
| 1 | 1 | |
| ≥2 | 2 | |
| Respiratory rate (brpm) | <20 | 0 |
| 20–29 | 1 | |
| ≥ 30 | 2 | |
| Peripheral oxygen saturation | ≥92 | 0 |
| on room air (%) | <92 | 2 |
| GCS | 15 | 0 |
| <15 | 2 | |
| BUN (mg/dL)/urea (mmol/L) | <19.6/<7 | 0 |
| ≥19.6–39.2/7–14 | 1 | |
| >39.2/>14 | 3 | |
| C-reactive protein (mg/L) | <50 mg/L | 0 |
| 50–99 | 1 | |
| ≥100 | 2 |
a The number of comorbidities out of chronic cardiac disease, chronic respiratory disease (excluding asthma), chronic renal disease (estimated glomerular filtration rate ≤30), mild to severe liver disease, dementia, chronic neurological conditions, connective tissue disease, diabetes mellitus (diet-, tablet-, or insulin-controlled), HIV or AIDS, and malignancy. Abbreviations: brpm: breaths per minute. GCS: Glasgow Coma Scale. BUN: blood urea nitrogen.