Table 2

Criteria for determining minor and major exacerbations

Minor exacerbationAsthma score 2Duration: 2 or more days
Major exacerbationAsthma score 3Duration: 2 or more days OR 1 day within the context of a minor exacerbation
Major exacerbation/medical emergencyAsthma score 4Duration: 1 or more days
Conclusion of exacerbationAsthma score has returned to 0 or 1Duration: for 3 or more days, otherwise exacerbation is deemed to be continuing