Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Change in croup score
Systematic review	277 children (3 months–12 years) with moderate croup presenting to an emergency department Data from 1 RCT	Mean between-group change from baseline in croup score at discharge 0.38 with oral dexamethasone (138 children) 0.42 with intramuscular dexamethasone (139 children)	WMD 0 95% CI 0 to 0 Potential methodological issue with blinding and population; see Further information on studies		Not significant