Comparison 1. Ribavirin versus no ribavirin.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mortality	4		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
1.1 RCT	1	136	Risk Ratio (M‐H, Random, 95% CI)	1.13 [0.29, 4.32]
1.2 Non‐randomized studies	3	549	Risk Ratio (M‐H, Random, 95% CI)	0.72 [0.41, 1.28]
2 Mortality stratified by severity of disease (Dokuzoguz 2013)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
3 Length of hospital stay (days)	2		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.1 RCT	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
3.2 Non‐randomized studies	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
4 Requirement for transfusion (platelets)	1		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected