Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Lung function
[17] Systematic review	Adults with acute asthma 4 RCTs in this analysis	FEV1 (% predicted) with iv magnesium sulfate with placebo	MD 4.41 95% CI 1.75 to 7.06 P = 0.0011	Effect size not calculated	iv magnesium sulfate
[17] Systematic review	Adults with acute asthma 8 RCTs in this analysis	PEF (L/minute) with iv magnesium sulfate with placebo	MD 17.40 95% CI 8.64 to 26.17 P <0.0001 Statistically significant heterogeneity was identified in the analysis (I2 = 50%; P = 0.05) See Further information on studies	Effect size not calculated	iv magnesium sulfate