Summary of studies selected
| Study | Task | Training cohort—reported from study | Validation cohort—reported from study |
| Gong et al15 | Predict progression to severe pneumonia in 15 days | 189 inpatients with COVID-19 | External 1: 165 inpatients with COVID-19 |
| External 2: 18 inpatients with COVID-19 | |||
| Zhou et al8 | Predict no progression to severe pneumonia in 1 day | 250 inpatients with COVID-19 | Internal: 127 inpatients with COVID-19 |
| Zou et al9 | Predict 7.5-day survival rate | 445 inpatients with COVID-19 | Internal: 224 inpatients with COVID-19 |
| Xie et al5 | Predict in-hospital mortality | 299 inpatients with COVID-19 | External: 145 inpatients with COVID-19 |
| Yan et al6 | Predict in-hospital mortality | 375 inpatients with severe COVID-19 | Internal: 110 inpatients with severe COVID-19 |
| Levy et al10 | Predict 14-day survival for hospitalised patients with COVID-19 | 5233 inpatients with COVID-19 | Cross-validation |
| Zhang et al11 | Task 1: predict in-hospital mortality | 775 inpatients with COVID-19 | External: 220 inpatients with COVID-19 |
| Task 2: predict in-hospital deterioration | |||
| Guo et al12 | Predict in-hospital deterioration | 818 inpatients with mild or moderate COVID-19 | External: 320 inpatients with mild or moderate COVID-19 |
| Hu et al13 | Predict in-hospital mortality | 182 inpatients with COVID-19 | External: 64 inpatients with COVID-19 |
| Carr et al14 | Predict 14-day deterioration | 452 inpatients with COVID-19 | External: 256 inpatients with COVID-19 |