Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

40 questions · 42 findings · 15 reviews · Vascular

No studies found 8 · 19%GRADE not reported 9 · 21.4%Very low 6 · 14.3%Low 12 · 28.6%Moderate 5 · 11.9%High 2 · 4.8%

Anticoagulant vs different dose of the same anticoagulant

Adverse events (minor bleeding) · non‐hospitalised individuals with COVID‐19 (asymptomatic and mild disease)

Anticoagulant showed no clear difference in adverse events (minor bleeding) compared with different dose of the same anticoagulant (low certainty).

1 finding from 1 review

Low molecular weight heparin vs no prophylaxis

All adverse effects, including allergies at injection site, minor and major bleeding, others ( · adults undergoing KA

Low‐molecular‐weight heparin showed no clear difference in all adverse effects, including allergies at injection site, minor… compared with no prophylaxis (moderate certainty).

1 finding from 1 review

Ultrasound‐assisted catheter‐directed thrombolysis plus standard intravenous heparinisation vs standard intravenous heparinisation

Treatment‐associated minor haemorrhage ( · people with intermediate‐risk (submassive) APE

It is very uncertain whether ultrasound‐assisted catheter‐directed thrombolysis plus standard… changes treatment‐associated minor haemorrhage ( compared with standard intravenous heparinisation (very low certainty).

1 finding from 1 review

Anticoagulant with or without ASA vs ASA only

Minor bleeding · people with antiphospholipid antibodies and no history of thrombosis

Anticoagulant with or without ASA may leads to higher bleeding ‐ minor (not requiring hospital admission) Median compared with ASA only (low certainty).

1 finding from 1 review