Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

21 questions · 21 findings · 10 reviews

No studies found 6 · 28.6%GRADE not reported 2 · 9.5%Very low 3 · 14.3%Low 10 · 47.6%Moderate 0 · 0%High 0 · 0%

Subcutaneous unfractionated heparin vs low molecular weight heparin

All‐cause mortality (7 days ‐ 3 months) · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in all‐cause mortality (7 days ‐ 3 months) compared with low molecular weight heparin (low certainty).

1 finding from 1 review

Subcutaneous unfractionated heparin vs unfractionated heparin

All‐cause mortality (5 days to 12 months) · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in all‐cause mortality (5 days to 12 months) compared with intravenous unfractionated heparin (low certainty).

1 finding from 1 review

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

All‐cause mortality (90‐day) · people with intermediate‐risk (submassive) APE

It is very uncertain whether ultrasound‐assisted catheter‐directed thrombolysis plus standard… changes all‐cause mortality (90‐day) compared with standard intravenous heparinisation (very low certainty).

1 finding from 1 review

Heparin vs no treatment

All‐cause mortality at 100 days post‐transplant · People undergoing autologous or HLA identical allogeneic bone marrow transplant with a variety of malignant diseases or aplastic anaemia

Summary of findings: Heparin showed no clear difference in all‐cause mortality at 100 days post‐transplant ( compared with no treatment (low certainty).

1 finding from 1 review

Low molecular weight heparin vs vitamin K antagonist (VKA)

All‐cause mortality (up to 3 months) · people with cancer with thrombosis prophylaxis and central venous catheters

Low‐molecular‐weight heparin (LMWH) showed no clear difference in all‐cause mortality (up to 3 months) compared with vitamin K antagonist (VKA) (low certainty).

1 finding from 1 review

Low molecular weight heparin vs vitamin K antagonist secondary prophylaxis

All‐cause mortality (time‐to‐event) · patients with cancer with venous thromboembolism

Low molecular weight heparin secondary prophylaxis showed no clear difference in all‐cause mortality (time‐to‐event) compared with vitamin K antagonist secondary prophylaxis (low certainty).

1 finding from 1 review