Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Lung function
[55] Systematic review	445 people 10 RCTs in this analysis	Proportion of people with at least a 20% improvement in baseline FEV1 with oral corticosteroid with placebo Absolute results not reported	WMD 10% 95% CI 2% to 18% When 5 RCTs not meeting all quality criteria were included in the analysis, the difference in effect size was 11% (95% CI 4% to 18%)	Effect size not calculated	oral corticosteroid