Comparison 2. Route of administration (Admission).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 IV vs placebo	7	529	Odds Ratio (M‐H, Random, 95% CI)	0.68 [0.39, 1.21]
2 Oral vs Placebo	4	291	Odds Ratio (M‐H, Random, 95% CI)	0.24 [0.11, 0.53]