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What do systematic reviews say?

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Evidence found and GRADE certainty

6 questions · 6 findings · 1 reviews

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 3 · 50%Moderate 2 · 33.3%High 1 · 16.7%

Heparin vs placebo

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Heparin showed no clear difference in symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with placebo (high certainty).

1 finding from 1 review

DOAC vs placebo

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

DOAC probably leads to lower symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with placebo (moderate certainty).

1 finding from 1 review

Anticoagulants (chosen at investigators' discretion) vs placebo

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Anticoagulants (chosen at investigators' discretion) showed no clear difference in symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with placebo (low certainty).

1 finding from 1 review

Vitamin K antagonists vs heparin

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Vitamin K antagonists showed no clear difference in symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with heparin (low certainty).

1 finding from 1 review

DOAC vs heparin

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

DOAC showed no clear difference in symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with heparin (low certainty).

1 finding from 1 review

Vitamin K antagonists vs placebo

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Vitamin K antagonists showed no clear difference in symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with placebo (moderate certainty).

1 finding from 1 review