Primary endpoint was the annualized rate of asthma exacerbations per patient
Secondary endpoint was the number of severe exacerbations
^An exacerbation was defined as worsening asthma that resulted in one or more of the following: an urgent medical care consultation (e.g., a primary care visit, an emergency department [ED] visit, or hospital admission); a prescription of systemic glucocorticoids for any duration; or an episode of high beta2-agonist use, which was defined as more than 16 actuations of salbutamol** or more than 8 actuations of Symbicort® over the course of 24 hours12
*Severe exacerbation was defined as worsening asthma leading to systemic glucocorticoid treatment for ≥3 days, hospitalisation or emergency room visit leading to systemic glucocorticoid treatment.
**In the study, salbutamol was referred to as ‘albuterol’, which is its US non-proprietary name.