Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,703 questions · 15,007 findings · 1,416 reviews

No studies found 2,881 · 19.2%GRADE not reported 1,551 · 10.3%Very low 3,111 · 20.7%Low 3,881 · 25.9%Moderate 2,669 · 17.8%High 914 · 6.1%

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Immunoglobulin vs placebo

Adverse events of any severity or seriousness · children with respiratory syncytial virus infection

Summary of findings table ‐ Immunoglobulins showed no clear difference in adverse events of any severity or seriousness compared with placebo (low certainty).

1 finding from 1 review

Hormonal therapy vs placebo or no intervention

Effect on later sexual function · symptomatic or early postmenopausal women1.
4 findings from 1 review
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Hormonal therapy vs placebo or no intervention

Effect on later sexual function · Postmenopausal women
5 findings from 1 review
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Methylphenidate vs placebo or no intervention

ADHD symptoms · Children and adolescents with ADHD

It is very uncertain whether methylphenidate changes ADHD symptoms: all parallel‐group trials and first‐period cross‐over… compared with placebo or no intervention (very low certainty).

1 finding from 1 review

Methylphenidate vs placebo or no intervention

Proportion of participants with one or more serious adverse events · Children and adolescents with ADHD

It is very uncertain whether methylphenidate changes proportion of participants with one or more serious adverse events compared with placebo or no intervention (very low certainty).

1 finding from 1 review

Methylphenidate vs placebo or no intervention

Adverse events considered non‐serious (penicillin versus doxycycline) · Children and adolescents with ADHD

It is very uncertain whether methylphenidate changes proportion of participants with one or more adverse events… compared with placebo or no intervention (very low certainty).

1 finding from 1 review

Methylphenidate vs placebo or no intervention

General behaviour: all parallel‐group trials and first‐period cross‐over trials General behaviour rating scales (Teacher‐rated) · Children and adolescents with ADHD

It is very uncertain whether methylphenidate changes general behaviour: all parallel‐group trials and first‐period… compared with placebo or no intervention (very low certainty).

1 finding from 1 review

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