July 2012: Annals of Emergency Medicine:
Early Administration of Systemic Corticosteroids Reduces
Hospital Admission Rates for Children With Moderate and Severe
In this study of children with moderate or severe asthma, administration of systemic corticosteroids within 75 minutes of triage decreased hospital admission rate and length of active treatment, suggesting that early administration of systemic corticosteroids may allow for optimal effectiveness.
Sounds like will be one of the core measurement in the future.