Early Warning Score characteristics
| qCSI | NEWS2 | MEWS | qSOFA | SIRS | CURB-65 | |
| Temperature | √ | √ | √ | |||
| Heart rate | √ | √ | √ | |||
| Systolic blood pressure | √ | √ | √ | √ | ||
| Respiratory rate | √ | √ | √ | √ | √ | √ |
| Oxygen saturation | √ | √ | ||||
| Use of supplemental oxygen | √ | √ | ||||
| Mental status | √ | √ | √ | √ | ||
| Leucocyte count | √ | |||||
| Age | √ | |||||
| Cut-off score/total sumscore | 3/12 | 5 or 6/23 | 3/15 | 2/3 | 2/4 | 3/5 |
MEWS, Modified Early Warning Score; NEWS2, National Early Warning Score 2; qCSI, Quick COVID-19 Severity Index; qSOFA, quick Sequential Organ Failure Assessment; SIRS, systemic inflammatory response syndrome.