Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Return visit or re-admission to hospital
Systematic review	60 children (6 months–14 years) with stridor and chest wall retractions at rest and croup score 3 or greater (see table 1 ) Data from 1 RCT	Proportion of children requiring return visit or re-admission to hospital by 7–10 days 2/31 (6%) with single oral dexamethasone dose of 0.6 mg/kg 1/29 (3%) with single oral dexamethasone dose of 0.3 mg/kg	RR 1.87 95% CI 0.18 to 19.55 P = 0.60		Not significant
Systematic review	60 children (6 months–14 years) with stridor and chest wall retractions at rest and croup score 3 or greater Data from 1 RCT	Proportion of children requiring return visit or re-admission to hospital by 7–10 days 1/31 (3%) with single oral dexamethasone dose of 0.3 mg/kg 0/29 (0%) with single oral dexamethasone dose of 0.15 mg/kg	RR 2.81 95% CI 0.12 to 66.40 P = 0.52		Not significant
Systematic review	130 children (3 months–9 years) with moderate croup (Westley Croup Score 2 or greater) in an outpatient setting 2 RCTs in this analysis	Return visits and/or (re-)admissions 18/63 (29%) with oral dexamethasone 0.6 mg/kg 18/67 (27%) with oral dexamethasone 0.15 mg/kg	RR 1.04 95% CI 0.62 to 1.75 P = 0.88		Not significant