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What do systematic reviews say?

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Evidence found and GRADE certainty

929 questions · 946 findings · 295 reviews · Headline outcomes only

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No studies found 150 · 15.9%GRADE not reported 47 · 5%Very low 312 · 33%Low 262 · 27.7%Moderate 138 · 14.6%High 37 · 3.9%

Two or more foetal haemoglobin inducers at any dose or duration vs a usual management protocol, placebo or a single foetal haemoglobin inducer

Frequency of transfusion (transfused volume/year) · people with non‐transfusion‐dependent β‐thalassaemia

The review found no eligible studies for this question.

1 finding from 1 review

Two or more foetal haemoglobin inducers at any dose or duration vs a usual management protocol, placebo or a single foetal haemoglobin inducer

Transfusion‐free interval (days) · people with non‐transfusion‐dependent β‐thalassaemia

The review found no eligible studies for this question.

1 finding from 1 review

Two or more foetal haemoglobin inducers at any dose or duration vs a usual management protocol, placebo or a single foetal haemoglobin inducer

Measures of HbF · people with non‐transfusion‐dependent β‐thalassaemia

The review found no eligible studies for this question.

1 finding from 1 review

Steroid therapy in first episode of nephrotic syndrome: 3 months or more vs 2 months of therapy

Frequent relapses · children with nephrotic syndrome

Steroid therapy in first episode of nephrotic syndrome: 3 months or… showed no clear difference in number with frequent relapses by 12 to 24 months compared with 2 months of therapy (moderate certainty).

1 finding from 1 review