TABLE 2

Treatment steps for the exhaled nitric oxide fraction algorithm

ICS treatment step#β2-agonist treatment step
Step 1: 0Step 1: terbutalin as required
Step 2: budesonide 100 µg twice dailyStep 2: formoterol 4.5 µg twice daily
Step 3: budesonide 200 µg twice dailyStep 3: formoterol 9 µg twice daily
Step 4: budesonide 400 µg twice dailyStep 4: formoterol 2×9 µg twice daily
Step 5: budesonide 800 µg twice daily

ICS: inhaled corticosteroid. #: based on exhaled nitric oxide fraction concentration; : based on asthma control questionnaire score.