Criteria for determining minor and major exacerbations
| Minor exacerbation | Asthma score 2 | Duration: 2 or more days |
|---|---|---|
| Major exacerbation | Asthma score 3 | Duration: 2 or more days OR 1 day within the context of a minor exacerbation |
| Major exacerbation/medical emergency | Asthma score 4 | Duration: 1 or more days |
| Conclusion of exacerbation | Asthma score has returned to 0 or 1 | Duration: for 3 or more days, otherwise exacerbation is deemed to be continuing |