Risk categories for a serious adverse event in patients with acute exacerbation of COPD seen in the emergency department
| Total score | Risk of adverse event, % | Risk category |
|---|---|---|
| 0 | 2.2 | Low |
| 1 | 4.0 | Medium |
| 2 | 7.2 | Medium |
| 3 | 12.5 | High |
| 4 | 20.9 | High |
| 5 | 32.9 | Very high |
| 6 | 47.5 | Very high |
| 7 | 62.6 | Very high |
| 8 | 75.6 | Very high |
| 9 | NA | Very high |
| 10 | 91.4 | Very high |
| > 10 | NA | Very high |
Note: COPD = chronic obstructive pulmonary disease, NA = not applicable (no patient had a score of 9 or >10).