Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Hospital admissions
[25] Systematic review	Adults with severe asthma (FEV1 or PEFR <50% predicted) 2 RCTs in this analysis Subgroup analysis	Proportion of people with severe asthma admitted to hospital timeframe unclear 13/47 (28%) with adding nebulised magnesium sulfate to beta2 agonists 18/40 (45%) with beta2 agonists alone	RR 0.62 95% CI 0.38 to 1.02 P = 0.06		Not significant