Table 1. Disease severity classification system for COVID-19, Republic of Korea, 2020.
| Criteria | Score |
|||
|---|---|---|---|---|
| 0 | 1 | 2 | 3 | |
| Pulse, beats per min | 51–100 | 41–50 or 101–110 | ≤ 40 or 111–130 | ≥ 131 |
| Systolic blood pressure, mmHg | 101–199 | 81–100 | 71–80 or ≥ 200 | ≤ 70 |
| Respiratory rate, breaths per min | 9–14 | 15–20 | ≤ 8 or 21–29 | ≥ 30 |
| Body temperature, °C | 36.1–37.4 | 35.1–36.0 or ≥ 37.5 | ≤ 35.0 | NA |
| Level of consciousness | Normal | Voice reaction | Pain reaction | Non-reaction |
COVID-19: coronavirus disease 2019; NA: not applicable.
Notes: Patients with a total score of 0–4 were classified as mild cases, moderate cases had a total score of 5–6, and severe and very severe cases had a score ≥ 7. Very severe cases were patients needing renal replacement therapy or extracorporeal membrane oxygenation.