“…8 Used sequentially, the HEDIS and Leidy criteria effectively identify persistent asthma patients. 5,8,10 Relying on patterns of medication use to categorize patients as having moderate and severe persistent asthma is consistent with GINA guidelines. 18 Use of oral corticosteroids, a commonly used indicator of asthma exacerbations, for acute sinusitis is unlikely to explain differences between the 2 populations because the exacerbation group also had more asthma-related ED visits, hospitalizations, and outpatient visits.…”