Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Borg dyspnoea scale
[17] Systematic review	Adults with acute asthma 4 RCTs in this analysis	Borg dyspnoea scale with iv magnesium sulfate with placebo	MD –0.22 95% CI –0.55 to +0.12		Not significant