Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,756 questions · 13,493 findings · 1,305 reviews · Headline outcomes only

No studies found 2,594 · 19.2%GRADE not reported 728 · 5.4%Very low 2,868 · 21.3%Low 3,777 · 28%Moderate 2,620 · 19.4%High 906 · 6.7%

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Zinc vs placebo

BMD Z score (total hip/femoral neck) · children and adults with β‐thalassaemia major and low bone mass

Summary of findings – zinc probably leads to higher BMD Z score (total hip/femoral neck) compared with placebo (moderate certainty).

1 finding from 1 review

Zinc vs placebo

BMD Z score (lumbar spine) · children and adults with β‐thalassaemia major and low bone mass

Summary of findings – zinc probably leads to higher BMD Z score (lumbar spine) compared with placebo (moderate certainty).

1 finding from 1 review