Severity scoring systems: are they internally valid, reliable and predictive of oxygen use in children with acute bronchiolitis?

Background: Severity scores are commonly used in research and clinically to assess the severity of bronchiolitis. However, there are limitations as few have been validated. The aim of our study was to: (i) determine the validity and reliability of a bronchiolitis scoring system, and (ii) examine if the score predicted the need for oxygen at 12 and 24 hrs.