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What do systematic reviews say?

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Evidence found and GRADE certainty

62 questions · 130 findings · 31 reviews · asked by two or more reviews

No studies found 32 · 24.6%GRADE not reported 5 · 3.8%Very low 27 · 20.8%Low 41 · 31.5%Moderate 24 · 18.5%High 1 · 0.8%

iMRI image‐guided surgery vs surgery

Overall survival · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

iMRI image‐guided surgery vs surgery

Progression‐free survival · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

iMRI image‐guided surgery vs surgery

Quality of life · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

5‐ALA image‐guided surgery vs surgery

Adverse events · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

5‐ALA image‐guided surgery vs surgery

Overall survival · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

5‐ALA image‐guided surgery vs surgery

Progression‐free survival · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

5‐ALA image‐guided surgery vs surgery

Quality of life · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

Neuronavigation image‐guided surgery vs surgery

Adverse events · high‐grade glioma

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

Metformin vs placebo or no treatment

Clinical pregnancy rate · women with polycystic ovary syndrome

It is very uncertain whether metformin changes clinical pregnancy rate per woman ‐ short protocol GnRH‐antagonist compared with placebo or no treatment (very low certainty).

2 findings from 2 reviews · compare the 2 reviews

Metformin vs placebo or no treatment

Miscarriage · women with polycystic ovary syndrome

Metformin showed no clear difference in miscarriage rate per woman compared with placebo or no treatment (low certainty).

2 findings from 2 reviews · compare the 2 reviews

CBT vs treatment

Reduction in anxiety symptoms (parent report) post‐treatment · children and adolescents with anxiety disorders
2 findings from 2 reviews · compare the 2 reviews

CBT vs WAIT LIST

Reduction in anxiety symptoms (parent report) post‐treatment · children and adolescents with anxiety disorders
3 findings from 2 reviews · compare the 2 reviews

Interdental brushing plus toothbrushing vs Toothbrushing alone

Gingivitis · Adults, 16 years and older (dentate)

It is very uncertain whether interdental brushing plus toothbrushing changes gingivitis (gingival index) compared with toothbrushing alone (very low certainty).

3 findings from 2 reviews · compare the 2 reviews

Interdental brushing plus toothbrushing vs Toothbrushing alone

Plaque · Adults, 16 years and older (dentate)

Interdental brushing plus toothbrushing may leads to lower plaque compared with toothbrushing alone (low certainty).

2 findings from 2 reviews · compare the 2 reviews

Interdental brushing plus toothbrushing vs Flossing plus toothbrushing

Gingivitis · Adults, 16 years and older (dentate)

Interdental brushing plus toothbrushing may leads to lower gingivitis (proportion of bleeding sites) compared with flossing plus toothbrushing (low certainty).

4 findings from 2 reviews · compare the 2 reviews
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Interdental brushing plus toothbrushing vs Flossing plus toothbrushing

Plaque · Adults, 16 years and older (dentate)

It is very uncertain whether interdental brushing plus toothbrushing changes plaque compared with flossing plus toothbrushing (very low certainty).

3 findings from 2 reviews · compare the 2 reviews

Interdental brushing plus toothbrushing vs Toothbrushing alone

Interproximal caries · Adults, 16 years and older (dentate)

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

Interdental brushing plus toothbrushing vs Flossing plus toothbrushing

Interproximal caries · Adults, 16 years and older (dentate)

The review found no eligible studies for this question.

2 findings from 2 reviews · compare the 2 reviews

Alternative lipid emulsion (LE) vs S‐LE

Rate of weight gain (g/kg/day) · Parenterally fed preterm infants
2 findings from 2 reviews · compare the 2 reviews

Alternative lipid emulsion (LE) vs S‐LE

Bronchopulmonary dysplasia/chronic lung disease · Parenterally fed preterm infants

Alternative lipid emulsion (LE) showed no clear difference in any BPD – OS‐LE vs S‐LE (sensitivity analysis) compared with soybean oil‐based LE (S‐LE) (low certainty).

2 findings from 2 reviews · compare the 2 reviews