TABLE 2

Estimates of ICS Usage Rates According to Sample Characteristics and Data Source

ICS Usage Rate, %No. of Studies
MinimumMedianMaximum
Asthma severity
    Mild10367214
    Moderate/severe1532949
    Severe3969805
    NHLBI criteria1939784
Race/ethnicity
    No information1740559
    Large proportion of black patients1732807
    Large proportion of Hispanic patients1526785
    Predominately white patients10519412
Age
    Children (0–12 y)2626261
    Nonadults (0–18 y)10358015
    Adults (≥18 y)3152789
    All ages1542948
Data source
    Commercial claims data1740557
    Medicaid claims data1027569
    Medical charts2633805
    Self-reported data26677811
    Self-reported/medical charts9494941
All studies10409433