Comparison 2. Nebulised magnesium sulfate + standard care versus placebo + standard care.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
2.1 Proportion of people with hospital admissions (from the emergency room)	1		Odds Ratio (M‐H, Random, 95% CI)	Totals not selected
2.2 Proportion of people who need ICU admission	2	281	Odds Ratio (M‐H, Random, 95% CI)	0.39 [0.15, 1.00]
2.3 Proportion of people who need ventilatory support (non‐invasive ventilation or assisted ventilation)	1		Odds Ratio (M‐H, Random, 95% CI)	Totals not selected
2.4 Length of hospital stay (days)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
2.5 All‐cause mortality	1		Odds Ratio (M‐H, Random, 95% CI)	Totals not selected
2.6 FEV 1 at 60 min (L)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
2.7 PEFR change from baseline at 60 min (L/min)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
2.8 PEFR at 60 min (L/min)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
2.9 Change in dyspnoea score	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
2.10 Change in SaO 2 (%)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected