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What do systematic reviews say?

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Evidence found and GRADE certainty

2,846 questions · 3,120 findings · 299 reviews · Headline outcomes only

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No studies found 660 · 21.2%GRADE not reported 162 · 5.2%Very low 955 · 30.6%Low 856 · 27.4%Moderate 382 · 12.2%High 105 · 3.4%

Intervention vs no intervention or control intervention (control)

Chronic HCV infection†‐ interferon‐alpha versus no intervention · people with acute hepatitis C infection

It is very uncertain whether intervention changes chronic HCV infection†‐ interferon‐alpha versus no intervention compared with no intervention or control intervention (control) (very low certainty).

1 finding from 1 review

Intervention vs no intervention or control intervention (control)

Chronic HCV infection†‐ interferon‐beta versus no intervention · people with acute hepatitis C infection

It is very uncertain whether intervention changes chronic HCV infection†‐ interferon‐beta versus no intervention compared with no intervention or control intervention (control) (very low certainty).

1 finding from 1 review

Intervention vs no intervention or control intervention (control)

Chronic HCV infection†‐ MTH‐68/B vaccine versus no intervention · people with acute hepatitis C infection

It is very uncertain whether intervention changes chronic HCV infection†‐ MTH‐68/B vaccine versus no intervention compared with no intervention or control intervention (control) (very low certainty).

1 finding from 1 review

Intervention vs no intervention or control intervention (control)

Adverse events (proportion) ‐ interferon‐alpha versus no intervention · people with acute hepatitis C infection

It is very uncertain whether intervention changes adverse events (proportion) ‐ interferon‐alpha versus no intervention compared with no intervention or control intervention (control) (very low certainty).

1 finding from 1 review

Intervention vs no intervention or control intervention (control)

Adverse events (number) ‐ interferon‐beta versus no intervention · people with acute hepatitis C infection

It is very uncertain whether intervention changes adverse events (proportion) ‐ interferon‐beta versus no intervention compared with no intervention or control intervention (control) (very low certainty).

2 findings from 1 review

Skin care intervention vs standard skin care or no skin care intervention

Stinging/allergic reactions to moisturisers (over the intervention period) · infants

Skin care intervention showed no clear difference in stinging/allergic reactions to moisturisers (over the intervention… compared with standard skin care or no skin care intervention (low certainty).

1 finding from 1 review

Dysarthria intervention vs placebo or other interventions

Dysarthria intervention versus any control for stroke subgroup: persisting effects, activity level · adults with dysarthria following stroke or other adult‐acquired, non‐progressive brain injury
2 findings from 1 review

Intervention vs no intervention or control intervention (control)

Serious adverse events (number) ‐ pegylated interferon‐alpha plus ribavirin versus pegylated interferon‐alpha · people with acute hepatitis C infection

It is very uncertain whether intervention changes serious adverse events (proportion) ‐ pegylated interferon‐alpha… compared with no intervention or control intervention (control) (very low certainty).

2 findings from 1 review