
Overuse of rescue medication among asthma patients is associated with increased exacerbations and higher total and asthma-related healthcare costs.

Overuse of rescue medication among asthma patients is associated with increased exacerbations and higher total and asthma-related healthcare costs.

The ratio of controller to total asthma medications can be calculated using 1 or 2 quarters of data; high versus low ratios differentiate patient characteristics.