Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

50 questions · 50 findings · 2 reviews · Vascular

No studies found 10 · 20%GRADE not reported 0 · 0%Very low 0 · 0%Low 20 · 40%Moderate 14 · 28%High 6 · 12%

Extended prophylaxis vs another VTE extended prophylaxis

Clinically relevant non‐major bleeding Treatment duration 28 ‐ 42 days · patients with unprovoked venous thromboembolism

VTE extended prophylaxis showed no clear difference in clinically relevant non‐major bleedingf compared with another VTE extended prophylaxis (moderate certainty).

1 finding from 1 review

Extended prophylaxis vs placebo

Clinically relevant non‐major bleeding Treatment duration 28 ‐ 42 days · patients with unprovoked venous thromboembolism

Extended prophylaxis showed no clear difference in clinically relevant non‐major bleedingh compared with placebo (low certainty).

1 finding from 1 review

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

Vitamin K antagonists vs placebo

Major bleeding · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Vitamin K antagonists showed no clear difference in bleeding ‐ major Treatment duration 28 ‐ 42 days compared with placebo (low certainty).

1 finding from 1 review

Vitamin K antagonists vs placebo

Clinically relevant non‐major bleeding Treatment duration 28 ‐ 42 days · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

The review found no eligible studies for this question.

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

DOAC vs placebo

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

DOAC leads to lower symptomatic DVT (proximal or distal) Treatment duration 28 ‐ 42 days compared with placebo (high certainty).

1 finding from 1 review