Objective: The authors hypothesized that adherence to anti-inflammatory treatment could reduce overall cost of asthma care, as higher spending on drugs would be offset by reductions in hospital and emergency care.
Methods: A retrospective observational study using 2 years of claims data for 41,234 commercially insured asthmatics on monotherapy with either leukotriene inhibitors (LI) or inhaled corticosteriods (ICS). Patients were grouped into adherence quartiles based on the percentage of days per year they had prescriptions filled (medication possession ratio).
We conducted a review of 164 relevant publications to consolidate the evidence on gaps in the quality of asthma care, the impact of those gaps, and the costs and benefits of closing those gaps. Researchers used a wide variety of definitions for measures of quality asthma care, clinical and utilization end points, and disease severity. Gaps in care were most evident for pharmacologic treatment, particularly the underuse of inhaled corticosteroids, with median usage rates of 40%; however, in studies with large proportions of black subjects, the inhaled corticosteroid usage rate was only 32%, compared with 51% for nonminority populations.
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