Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Length of stay
Systematic review	37 children with moderate croup in an inpatient setting Data from 1 RCT	Mean length of stay (hours) 59 with nebulised racemic adrenaline (16 children) 91 with placebo (21 children)	MD –32.00 95% CI –59.14 to –4.86	Effect size not calculated	epinephrine
Systematic review	54 children with moderate croup in an outpatient setting Data from 1 RCT	Mean length of stay (hours) 11.5 with nebulised racemic adrenaline (25 children) 13.3 with placebo (29 children)	MD –1.80 95% CI –4.07 to +0.47		Not significant