Table 2.
Final 4C Mortality Score for in-hospital mortality in patients with covid-19. Prognostic index derived from penalised logistic regression (LASSO) model
| Variable | 4C Mortality Score |
|---|---|
| Age (years) | |
| <50 | — |
| 50-59 | +2 |
| 60-69 | +4 |
| 70-79 | +6 |
| ≥80 | +7 |
| Sex at birth | |
| Female | — |
| Male | +1 |
| No of comorbidities* | |
| 0 | — |
| 1 | +1 |
| ≥2 | +2 |
| Respiratory rate (breaths/min) | |
| <20 | — |
| 20-29 | +1 |
| ≥30 | +2 |
| Peripheral oxygen saturation on room air (%) | |
| ≥92 | — |
| <92 | +2 |
| Glasgow coma scale score | |
| 15 | — |
| <15 | +2 |
| Urea (mmol/L) | |
| <7 | — |
| 7-14 | +1 |
| >14 | +3 |
| C reactive protein (mg/L) | |
| <50 | — |
| 50-99 | +1 |
| ≥100 | +2 |
Covid-19=coronavirus disease 2019.
*
Comorbidities were defined by using Charlson comorbidity index, with the addition of clinician defined obesity.