Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,721 questions · 19,640 findings · 2,039 reviews · Headline outcomes only

No studies found 3,754 · 19.1%GRADE not reported 1,273 · 6.5%Very low 4,859 · 24.7%Low 5,568 · 28.4%Moderate 3,240 · 16.5%High 946 · 4.8%

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LMWH prophylaxis vs UFH

Adverse effects sufficient to stop treatment · pregnant women at increased risk of VTE during pregnancy and the early postnatal period

It is very uncertain whether antenatal (± postnatal) prophylaxis: LMWH changes adverse effects sufficient to stop treatment compared with UFH (very low certainty).

1 finding from 1 review

Heparin prophylaxis vs no treatment/placebo

Symptomatic thromboembolic events ( · pregnant women at increased risk of VTE during pregnancy and the early postnatal period

It is very uncertain whether antenatal (± postnatal) prophylaxis: heparin (LMWH or UFH) changes symptomatic thromboembolic events ( compared with no treatment/placebo (very low certainty).

1 finding from 1 review

Heparin prophylaxis vs no treatment/placebo

Symptomatic PE · pregnant women at increased risk of VTE during pregnancy and the early postnatal period

It is very uncertain whether antenatal (± postnatal) prophylaxis: heparin (LMWH or UFH) changes symptomatic PE ( compared with no treatment/placebo (very low certainty).

1 finding from 1 review

Heparin prophylaxis vs no treatment/placebo

Symptomatic DVT · pregnant women at increased risk of VTE during pregnancy and the early postnatal period

It is very uncertain whether antenatal (± postnatal) prophylaxis: heparin (LMWH or UFH) changes symptomatic DVT ( compared with no treatment/placebo (very low certainty).

1 finding from 1 review

Heparin prophylaxis vs no treatment/placebo

Adverse effects sufficient to stop treatment · pregnant women at increased risk of VTE during pregnancy and the early postnatal period

It is very uncertain whether antenatal (± postnatal) prophylaxis: heparin (LMWH or UFH) changes adverse effects sufficient to stop treatment compared with no treatment/placebo (very low certainty).

1 finding from 1 review

LMWH prophylaxis vs UFH

Symptomatic thromboembolic events ( · pregnant women at increased risk of VTE during pregnancy and the early postnatal period

It is very uncertain whether antenatal (± postnatal) prophylaxis: LMWH changes symptomatic thromboembolic events ( compared with UFH (very low certainty).

1 finding from 1 review

High MCT formula vs low MCT formula

Weight gain · promoting short‐term growth of preterm infants
2 findings from 1 review

Antihypertensive drug therapy vs placebo

Number of cases of dementia Range of · participants without prior cerebrovascular disease for prevention of cognitive impairment and dementia

It is very uncertain whether antihypertensive therapy changes number of cases of dementia Range of compared with placebo (very low certainty).

1 finding from 1 review