Comparison 3. Subsidiary descriptive analysis ‐ Ribavirin versus no ribavirin.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mortality stratified study type	14		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 (serious risk of bias)	3	549	Risk Ratio (M‐H, Random, 95% CI)	0.72 [0.41, 1.28]
1.3 Non‐randomized studies (critical risk of bias)	10	1214	Risk Ratio (M‐H, Random, 95% CI)	0.43 [0.22, 0.86]