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7-point ordinal scale used in BACC, COVACTA, EMPACTA and TOCIBRAS trials
| 1 | Discharged or ready for discharge |
| 2 | In hospital, no supplemental oxygen |
| 3 | In hospital, receiving supplemental oxygen |
| 4 | In hospital receiving NIV or high flow oxygen (ICU or non ICU) |
| 5 | In ICU, mechanically ventilated |
| 6 | In ICU, mechanically ventilated with additional organ support, or ECMO |
| 7 | Dead |
