Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Return hospital visits and re-admission rates
RCT	372 children presenting to the emergency department with moderate croup, Westley Croup Score of 2 or greater (see table 1 ) 2 RCTs in this analysis	Proportion of children needing a return visit or re-admission to hospital 45/184 (24%) with oral dexamethasone 57/188 (30%) with intramuscular dexamethasone	RR 0.80 95% CI 0.58 to 1.12 P = 0.20 Potential methodological issue with blinding and population; see Further information on studies		Not significant